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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Vyunishev A. M., Aleksandrovsky A. S., Zaitsev A. I., Slabko V. V.
Заглавие : Cerenkov nonlinear diffraction of femtosecond pulses in random nonlinear photonic crystal
Коллективы : Russia-Taiwan School-Seminar on Nonlinear Optics and Photonics (3; 2013 ; Jun. ; 14-18; Владимир/ Суздаль)
Место публикации : Third Russia-Taiwan School-Seminar on Nonlinear Optics and Photonics : Program and Book of Abstracts. - 2013. - Ст.S1-11-O30. - P.20
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Popov A. K., Myslivets S. A., Shalaev M. I., Slabko V. V.
Заглавие : Photonic amplification and switching through nonlinear coupling with negative phonons
Коллективы : International Conference on Photonics in Switching (6; 2012 ; Sept ; 11-14; Ajaccio, France)
Место публикации : Int. Conf. Phot. Switch., PS 2012. - 2012. - Ст.6608287. - P. - ISBN 9782912328618 (ISBN)
Ключевые слова (''Своб.индексиров.''): extraordinary stimulated raman scattering--negative group velocity--nonlinear optical wave mixing--optical phonos--photonic components and devices
Аннотация: A family of switching photonic devices and amplifiers are proposed which mimic and utilize extraordinary coherent nonlinear-optical frequency conversion processes commonly attributed to plasmonic metamaterials. В© 2012 SEE.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Popov A. K., Shalaev M. I., Myslivets S. A., Slabko V. V.
Заглавие : Photonic devices with negative phonons: a concept, extraordinary properties and materials
Коллективы : Национальный исследовательский университет ИТМО, Оптическое общество им. Д.С. Рождественского, Optics Design Group of Optical Society of Japan, JSAP, International Conference on Optics-Photonics Design and Fabrication (ODF12) (8; 2012 ; July ; 2-5; S.-Petersburg)
Место публикации : 8th International Conference on Optics-Photonics Design and Fabrication (ODF12): Book of abstracts. - 2012. - P.4S4-02
Аннотация: A family of readily available optical materials and photonic devices are proposed which mimic extraordinary coherent nonlinear-optical frequency conversion processes commonly attributed to plasmonic metamaterials that are very challenging to make.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Slabko V. V., Tsipotan A. S., Aleksandrovsky A. S.
Заглавие : Resonant light-controlled self-assembly of ordered nanostructures
Коллективы : International Workshop on Theoretical and Computational Nano-Photonics (4th; 26-28 Oct 2011; Bad Honnef, Germany)
Место публикации : Photonics Nanostruct.: Elsevier Science BV, 2012. - Vol. 10, Is. 4. - P.636-643. - ISSN 1569-4410, DOI 10.1016/j.photonics.2012.06.002
Примечания : Cited References: 15. - This work has been supported by the Ministry of Education and Science of Russian Federation (Contract 16.740.11.0150 and Grant 2.1.1/3455), by RAS Projects 29 and 31, by PSB RAS Project 3.9.5, by SB RAS Projects 43 and 101, and by SFU Grant F12.
Ключевые слова (''Своб.индексиров.''): metal nanoparticles--semiconductor nanoparticles--self-assembly--light-induced processes
Аннотация: The possibility of light-controllable formation of heterogeneous nanostructures containing resonant metallic and semiconductor nanoparticles is considered. Interaction energy between light-induced dipole polarization of nanoparticles at modest light intensity can be much more than the thermal motion energy. The configuration of self-assembled nanostructure can be controlled by the frequency and polarization of the light.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chernov A. I., Fedotov P. V., Krylov A. S., Vtyurin A. N., Obraztsova E. D.
Заглавие : Heat-induced transformations in coronene - Single-walled carbon nanotube systems
Коллективы : International Workshop on Nanocarbon Photonics and Optoelectronics (4th; 28 July - 1 August, 2014; Polvijärvi, North Karelia, Finland)
Место публикации : J. Nanophoton.: SPIE-Int. Soc. Optical Engineering, 2016. - Vol. 10, Is. 1: Special Section on Nanocarbon Photonics and Optoelectronics. - Ст.012504. - ISSN 19342608 (ISSN), DOI 10.1117/1.JNP.10.012504
Примечания : Cited References: 14
Предметные рубрики: Graphene nanoribbons
Encapsulation
Reactor
Ключевые слова (''Своб.индексиров.''): graphene nanoribbons--coronene molecules--coronene stacks--columns--single-walled carbon nanotubes--nanoreactor
Аннотация: Coronene molecules are used as filler for single-walled carbon nanotubes. Variation of the synthesis temperature regimes leads to formation of different types of carbon nanostructures inside the nanotubes. Accurate determination of the structures by optical spectroscopy methods remains an important issue in composite materials. Clear distinction between adsorbed organic molecules on the surface of the tubes and filled structures may be accessed by Raman and photoluminescence spectroscopies. We perform additional heat treatment after the initial synthesis procedure and show the evolution of the optical spectral features corresponding to the filled structures and adsorbed materials on the surface of single-walled carbon nanotubes. © 2015 Society of Photo-Optical Instrumentation Engineers (SPIE).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tsipotan A. S. , Slabko V. V., Aleksandrovsky A. S., Gerasimova M. A.
Заглавие : Wavelength-controlled manipulation of colloidal quasi-resonant quantum dots under pulsed laser irradiation
Коллективы : Photonics Asia
Место публикации : Photonics Asia: Asia’s premier event on nanophotonics, biomedicine, lasers,optical design, plasmonics, sensors, optoelectronics infrared/terahertz, and more : advance technical program. - 2016. - Ст.10027-35. - P.39
Аннотация: Electrodynamical interaction between excited NPs is rather universal and allows formation of wide variety of nanostructures both of homo- and heterogeneous content. Experimental results are obtained for CdTe QDs with the excitonic resonance at 520 nm. Six different samples of the same colloid solution were irradiated at wavelengths from 540 to 570 nm. Modifications of absorption spectra of solutions after irradiation was detected, being most prominent at 555 and 560 nm irradiation wavelengths. Analysis of spectra shows that up to 47% of QDs were assembled into pairs. Therefore, possibility of precise QDs manipulation via laser-induced electrodynamical interaction is demonstrated.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Piatnov M. V., Vetrov S. Ya., Timofeev I. V.
Заглавие : Optical localized states in the liquid crystal structure bordering on the metal
Коллективы : Workshop on Liquid Crystals for Photonics
Место публикации : 6th Workshop on Liq. Cryst. for Photon./ program-book. - 2016. - Ст.PO11. - P. 53
Примечания : Библиогр.: 2
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Ignatchenko V. A., Tsikalov D. S.
Заглавие : Local density of states in one-dimensional photonic crystals and sinusoidal superlattices
Коллективы : International Conference on Photonics of Nano- and Bio-Structures, International Conference on Photonics of Nano- and Micro-Structures
Место публикации : Physics Procedia: Elsevier, 2017. - Vol. 86. - P.113-116. - , DOI 10.1016/j.phpro.2017.01.030
Примечания : Cited References: 14
Ключевые слова (''Своб.индексиров.''): photonic crystals--green's function--ldos--sinusoidal modulation--chain fractions
Аннотация: We have calculated the local density of states (LDOS) for four Brillouin zones of a superlattice for a plane source depending on its location relative to the change in the profile of dielectricpermeability (z) of the superlattice. It is shown that the LDOS for the cases of sinusoidal and rectangular profiles of (z) are close to each other in the first and second Brillouin zones, and sharp differences between them appear beginning with the third zone. Radical changes in the LDOS occur in a rectangular superlattice with different thicknesses of adjacent layers. In this case, the function LDOS has a sharp jump at the edges of the allowed bands in the transition from one layer to another. The effects studied theoretically in this paper, can be detected and studied experimentally by the intensively developing currently methods of nanooptics. © 2017 The Authors.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Ignatchenko V. A., Polukhin D. S.
Заглавие : Green's functions of polaritons in a medium with zero-mean inhomogeneous coupling parameter
Коллективы : International Conference on Photonics of Nano- and Bio-Structures, International Conference on Photonics of Nano- and Bio-Structures
Место публикации : Physics Procedia: Elsevier, 2017. - Vol. 86. - P.117-121. - , DOI 10.1016/j.phpro.2017.01.031
Примечания : Cited References: 10
Ключевые слова (''Своб.индексиров.''): electromagnetic waves--optical phonons--crossing resonance--polaritons--green's functions--self-consistent approximation
Аннотация: Dynamic susceptibilities (Green's functions) of the interacting electromagnetic waves G”e(ω) and optical phonons G”u(ω) in a medium with zero-mean inhomogeneous coupling parameter have been considered. The calculation was performed using a self-consistent approximation for the two stochastically interacting wave fields. It is shown that on the tops of the resonance maxima of the imaginary parts of the Green functions the fine structure is formed: a minimum (dip) on the top of G”e(ω) and narrow maximum (peak) on the top of G”u(ω). With increasing the correlation wavenumber of inhomogeneities kc (i.e., with decreasing the size of inhomogeneities), the width of the peak on G”u(ω) decreases, and two resonance maxima in the function G”e(ω) are formed. Because of the large difference in the speeds of light and optical phonons, the fine structure of the polaritons is manifested itself more clearly and saved to a much larger values of kc, than for the studied earlier crossing resonance of spin and elastic waves.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov A. K., Nefedov I. S., Myslivets S. A.
Заглавие : Hyperbolic carbon nanoforest for phase matching of ordinary and backward electromagnetic waves: Second harmonic generation
Место публикации : ACS Photonics: American Chemical Society, 2017. - Vol. 4, Is. 5. - P.1240-1244. - ISSN 23304022 (ISSN), DOI 10.1021/acsphotonics.7b00146
Примечания : Cited References: 14. - This material is based on work supported in part by the U.S. Army Research Laboratory through the U.S. Army Research Office under Grant Number W911NF-14-1-0619 and by the Russian Foundation for Basic Research under Grant RFBR 15-02-03959A.
Ключевые слова (''Своб.индексиров.''): backward electromagnetic waves--carbon nanotubes--hyperbolic metamaterials--second harmonic generation
Аннотация: We show that a deliberately engineered dispersive metamaterial slab can enable the coexistence and phase matching of ordinary fundamental and contra-propagating backward second harmonic electromagnetic waves. Energy flux and phase velocity are contra-directed in the backward waves, which is the extraordinary phenomenon that gives rise to unique nonlinear optical propagation processes. We demonstrate that frequencies, phase, and group velocities, as well as the losses inherent to the guided electromagnetic modes supported by such metamaterial, can be tailored to maximize the conversion of frequencies and to reverse the propagation direction of the generated second harmonic wave. Such a possibility, which is of paramount importance for nonlinear photonics, is proven using a numerical model describing the hyperbolic metamaterial made of carbon nanotubes standing on the metal surface. Extraordinary properties of the backward-wave second harmonic generation in the reflection direction and of the corresponding frequency doubling metareflector in the THz are investigated with a focus on the pulsed regime. © 2017 American Chemical Society.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yang Z. -Y., Ishii S., Yokoyama T., Dao T. D., Sun M. -G., Pankin P. S., Timofeev I. V., Nagao T., Chen K. -P.
Заглавие : Narrowband wavelength selective thermal emitters by confined tamm plasmon polaritons
Место публикации : ACS Photonics: American Chemical Society, 2017. - Vol. 4, Is. 9. - P.2212-2219. - ISSN 23304022 (ISSN), DOI 10.1021/acsphotonics.7b00408
Примечания : Cited References: 41. - This work was supported by the Ministry of Science and Technology (MOST), Taiwan, ROC (MOST 104-2221-E-009-130-MY3)
Ключевые слова (''Своб.индексиров.''): narrowband absorber--tamm plasmon polaritons--thermal emission
Аннотация: This study experimentally demonstrates infrared wavelength selective thermal emission based on Tamm plasmon polaritons (TPPs). Unlike conventional TPP structures, which have a thin metal layer on a distributed Bragg reflector (DBR), the proposed structure has a thick metal under a DBR that is more robust for thermal radiation. The number of DBR pairs is a critical factor in maximizing the narrowband emission needed to satisfy the impedance matching condition, which varies with the choice of metal film. Optimum designs for four different metals, aluminum, gold, molybdenum, and tungsten, are presented. The temporal coupled-mode theory was introduced to explain the origin of the high Q-factor of the proposed structure, which can achieve a twice higher Q-factor for the measured emissivity compared to typical plasmonic thermal emitters. The structure is one-dimensional, consisting of only multilayers and free from nanopatterning, offering a practical design in applications such as gas sensing, narrowband IR sources, and thermophotovoltaics. © 2017 American Chemical Society.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nemtsev I. V., Tambasov I. A., Ivanenko A. A., Zyryanov V. Ya.
Заглавие : Angle-resolved reflection spectroscopy of high-quality PMMA opal crystal
Место публикации : Photonics Nanostruc. Fundam. Appl. - 2018. - Vol. 28. - P.37-44. - ISSN 15694410 (ISSN), DOI 10.1016/j.photonics.2017.11.007
Примечания : Cited References: 72. - This study was supported by the Russian Foundation for Basic Research (Grant No. 16-32-00302 мол_а ), by the Council for Grants of the President of the Russian Federation ( SP-317.2015.1 ), by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 16-42-243059 р_мол_а and No. 16-48-242092 р_офи_м, and by the Program of Foundation for Promotion of Small Enterprises in Science and Technology (No.6662ГУ2015) (“УМНИК” program). We acknowledge the support of Krasnoyarsk Regional Center for Collective Use of SB of RAS for equipment and technique. We thank A. V. Shabanov and O. V. Shabanova for assistance in dispersion preparation. We also thank V. G. Myagkov for useful discussion of the results.
Ключевые слова (''Своб.индексиров.''): pmma opal--photonic crystal--electron microscopy--angular resolved reflective spectroscopy
Аннотация: PMMA opal crystal was prepared by a simple hybrid method, which includes sedimentation, meniscus formation and evaporation. We investigated three surfaces of this crystal by angle-resolved reflective light spectroscopy and SEM study. The angle-resolved reflective measurements were carried out in the 400–1100 nm range. We have determined the high-quality ordered surface of the crystal region. Narrow particle size distribution of the surface has been revealed. The average particle diameter obtained with SEM was nearly 361 nm. The most interesting result was that reflectivity of the surface turned out up to 98% at normal light incidence. Using a fit of dependences of the maximum reflectivity wavelength from an angle based on the Bragg–Snell law, the wavelength of maximum 0° reflectivity, the particle diameter and the fill factor have been determined. For the best surface maximum reflectivity wavelength of a 0° angle was estimated to be 869 nm. The particle diameter and fill factor were calculated as 372 nm and 0.8715, respectively. The diameter obtained by fitting is in excellent agreement with the particle diameter obtained with SEM. The reflectivity maximum is assumed to increase significantly when increasing the fill factor. We believe that using our simple approach to manufacture PMMA opal crystals will significantly increase the fabrication of high-quality photonic crystal templates and thin films
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13.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Molchanova A. D., Boldyrev K. N., Erofeev A. S., Moshkina E. M., Bezmaternykh L. N.
Заглавие : Magnetic phase transitions and linear magnetic dichroism in manganese-doped copper metaborate (Cu,Mn)B2O4
Коллективы : International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures
Место публикации : J. of Phys.: Conf. Ser.: IOP, 2017. - Vol. 917. - Ст.072003. - DOI 10.1088/1742-6596/917/7/072003
Примечания : Cited References: 10. - This work was supported by the Russian Foundation for Basic Research (Grant No 15-02-07451a) and the President of the Russian Federation (Grant МК-3577.2017.2)
Аннотация: The work presents a study of manganese-doped copper metaborate (Cu,Mn)B2O4 using optical spectroscopy. The temperature of the antiferromagnetic phase transition TN = 19 K has been defined according to the absorption spectra. Polarization studies (Cu,Mn)B2O4 in isotropic ab-plane show the presence of linear antiferromagnetic dichroism in the magnetically ordered state previously observed in pure copper metaborate CuB2O4.This measurement allows to find the magnetic phase transition into an elliptical structure at the temperature T* = 7.0 K.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Khodenkov S. A., Yushkov I. A.
Заглавие : Band-pass filters based on photonic crystal
Коллективы : International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures, Saint Petersburg OPEN, International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures
Место публикации : J. Phys. Conf. Ser. - 2017. - Vol. 917, Is. 6. - Ст.062043. - ISSN 17426588 (ISSN), DOI 10.1088/1742-6596/917/6/062043
Примечания : Cited References: 5. - This study was supported by the Ministry of Education and Science of the Russian Federation, grant МК-9119.2016.8.
Ключевые слова (''Своб.индексиров.''): amplitude frequency characteristics--connection coefficients--glass substrates--high contrast--high frequency hf--periodic interchange--relative bandwidth--ultra-wideband filters
Аннотация: Multilayer photonic crystal structures with bleaching layers are being investigated. In order to calculate the characteristics of ultra-wideband filters on their basis, T-lines lossless model was used. Amplitude-frequency characteristics for the synthesized filters of 5th, 11th and 17th orders are given. It is proved that by a significant increase in filter N order, the difference between the connection coefficients of central resonators' layers' becomes negligible. This makes it possible to develop 27-order filter, in which almost half of the layers are realized by periodic interchange of only two identical high-contrast materials. The investigated band-pass filters, including the ones on a glass substrate, have high frequency-selective properties at a relative bandwidth of 80%.
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Popov A. K., Nefedov I. S., Myslivets S. A.
Заглавие : Backward-wavphase-matching in spatially dispersive metamaterials
Коллективы : International Conference on Nano-photonics and Nano-electronics
Место публикации : Int. Conf. on Nano-photonics and Nano-electronics (ICNN2017). - 2017. - Ст.P01
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zakomirnyi V. I., Rasskazov I. L., Gerasimov V. S., Ershov A. E., Polyutov S. P., Karpov S. V., Agren H.
Заглавие : Titanium nitride nanoparticles as an alternative platform for plasmonic waveguides in the visible and telecommunication wavelength ranges
Место публикации : Photonics Nanostruc. Fundam. Appl. - 2018. - Vol. 30. - P.50-56. - ISSN 15694410 (ISSN), DOI 10.1016/j.photonics.2018.04.005
Примечания : Cited References: 85. - This work was supported by the RF Ministry of Education and Science, the State contract with Siberian Federal University for scientific research in 2017–2019 and SB RAS Program No II.2P (0358-2015-0010).
Ключевые слова (''Своб.индексиров.''): nanoparticle--titanium nitride--surface plasmon polariton--plasmon waveguide--refractory plasmonics
Аннотация: We propose to utilize titanium nitride (TiN) as an alternative material for linear periodic chains (LPCs) of nanoparticles (NPs) which support surface plasmon polariton (SPP) propagation. Dispersion and transmission properties of LPCs have been examined within the framework of the dipole approximation for NPs with various shapes: spheres, prolate and oblate spheroids. It is shown that LPCs of TiN NPs support high-Q eigenmodes for an SPP attenuation that is comparable with LPCs from conventional plasmonic materials such as Au or Ag, with the advantage that the refractory properties and cheap fabrication of TiN nanostructures are more preferable in practical implementations compared to Au and Ag. We show that the SPP decay in TiN LPCs remains almost the same even at extremely high temperatures which is impossible to reach with conventional plasmonic materials. Finally, we show that the bandwidth of TiN LPCs from non-spherical particles can be tuned from the visible to the telecommunication wavelength range by switching the SPP polarization, which is an attractive feature for integrating these structures into modern photonic devices.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov A. K., Myslivets S. A., Slabko V. V., Tkachenko V. A., George T. F.
Заглавие : Shaping light in backward-wave nonlinear hyperbolic metamaterials
Коллективы : U. S. Army Research Office [W911NF-14-1-0619]; Ministry of Education and Science of the Russian Federation [3.6341.2017/6.7]
Место публикации : Photonics. - 2018. - Vol. 5, Is. 2. - Ст.8. - ISSN 2304-6732, DOI 10.3390/photonics5020008
Примечания : Cited References: 46. - Alexander K. Popov acknowledges support by the U. S. Army Research Office under grant number W911NF-14-1-0619. Vitaly V. Slabko acknowledges support by the Ministry of Education and Science of the Russian Federation (project # 3.6341.2017/6.7).
Предметные рубрики: NEGATIVE-INDEX METAMATERIALS
OPTICAL PARAMETRIC OSCILLATOR
Ключевые слова (''Своб.индексиров.''): optical metamaterials--fundamental concepts in photonics--light-matter--interactions at the subwavelength and nanoscale--fundamental--understanding of linear and nonlinear optical processes in novel metamaterials underpinning photonic devices and components--advancing the frontier of nanophotonics with the associated nanoscience and nanotechnology--nanostructures that can serve as building blocks for nano-optical systems--use of nanotechnology in photonics--nonlinear nanophotonics--plasmonics and excitonics--subwavelength components and negative index materials--slowing, store, and processing light pulses--materials for optical sensing, for tunable optical delay lines, for optical buffers, for high extinction optical switches, for novel image processing hardware, and for highly-efficient wavelength converters
Аннотация: Backward electromagnetic waves are extraordinary waves with contra-directed phase velocity and energy flux. Unusual properties of the coherent nonlinear optical coupling of the phase-matched ordinary and backward electromagnetic waves with contra-directed energy fluxes are described that enable greatly-enhanced frequency and propagation direction conversion, parametrical amplification, as well as control of shape of the light pulses. Extraordinary transient processes that emerge in such metamaterials in pulsed regimes are described. The results of the numerical simulation of particular plasmonic metamaterials with hyperbolic dispersion are presented, which prove the possibility to match phases of such coupled guided ordinary and backward electromagnetic waves. Particular properties of the outlined processes in the proposed metamaterial are demonstrated through numerical simulations. Potential applications include ultra-miniature amplifiers, frequency changing reflectors, modulators, pulse shapers, and remotely actuated sensors.
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18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zakomirnyi V. I., Rasskazov I. L., Gerasimov V. P., Ershov A. E., Ågren H., Polyutov S. P., Karpov S. V.
Заглавие : Ultra-narrow surface lattice resonances in periodic structures of refractory titanium nitride nanodiscs
Коллективы : Novel Optical Materials and Applications, Topical Meeting, OSA Optics and Photonics Congress
Место публикации : 14th Topical Meeting Novel Optical Materials and Applications: program. - 2018. - Polaritonics. - Ст.NOW4J.3. - P.85
Аннотация: We show that regular arrays of TiN nanodiscs support high-Q surface lattice resonances at telecom range. The obtained data open new prospects for utilization of refractory TiN in new photonics interconnects operating at high temperatures.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bikbaev R. G., Vetrov S. Ya., Timofeev I. V.
Заглавие : Two types of localized states in a photonic crystal bounded by an epsilon near zero nanocomposite
Место публикации : Photonics. - 2018. - Vol. 5, Is. 3. - Ст.22. - ISSN 23046732 (ISSN), DOI 10.3390/photonics5030022
Примечания : Cited References: 53
Ключевые слова (''Своб.индексиров.''): photonic crystal--nanocomposite--epsilon near zero material--tamm plasmon polariton
Аннотация: The spectral properties of a one-dimensional photonic crystal bounded by a resonant absorbing nanocomposite layer with the near-zero permittivity have been studied. The problem of calculating the transmittance, reflectance, and absorptance spectra of such structures at the normal and oblique incidence of light has been solved. It is shown that, depending on the permittivity sign near zero, the nanocomposite is characterized by either metallic or dielectric properties. The possibility of simultaneous formation of the Tamm plasmon polariton at the photonic crystal/metallic nanocomposite interface and the localized state similar to the defect mode with the field intensity maximum inside the dielectric nanocomposite layer is demonstrated. Specific features of field localization at the Tamm plasmon polariton and defect mode frequencies are analyzed. © 2018 by the authors.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Wu, Po-Chang, Wu, Guan-Wei, Timofeev I. V., Zyryanov V. Ya., Lee, Wei
Заглавие : Electro-thermally tunable reflective colors in a self-organized cholesteric helical superstructure
Коллективы : Ministry of Science and Technology, Taiwan (MOST) [106-2923-M-009-002-MY3, 107-2112-M-009-012-MY3]
Место публикации : Photonics Res. - 2018. - Vol. 6, Is. 12. - P.1094-1100. - ISSN 2327-9125, DOI 10.1364/PRJ.6.001094
Примечания : Cited References: 23. - Ministry of Science and Technology, Taiwan (MOST) (106-2923-M-009-002-MY3, 107-2112-M-009-012-MY3).
Предметные рубрики: LIQUID-CRYSTALS
BAND-GAP
Аннотация: We propose to dynamically control the reflective color of a cholesteric liquid crystal (CLC) by electrically tuning the center wavelength (��c) of the bandgap. The CLC, sandwiched in a planar-aligned cell with indium–tin-oxide electrodes, possesses negative dielectric anisotropy and thermo-responsive spectral properties. The helix in the Grandjean planar state, which is subject to vertically applied voltage, should be undisturbed in that the long molecular axis is initially perpendicular to the direction of the electric field. Surprisingly, when the frequency of the applied voltage is higher than a critical value, ��c of the CLC cell varies as a function of the voltage. The underlying mechanism is the voltage-induced temperature change through dielectric heating in the frequency regime of pseudo-dielectric relaxation, attributable to the significant equivalent resistance–capacitance circuit of the cell due to the use of electrode layers with finite conductance. The driving voltage enabling the tuning of ��c in the entire visible spectrum is as low as 12 Vrms in a 5 μm thick cell at a frequency of 2 MHz. The proposed CLC cell, exhibiting a broad electrically tunable spectral range from the near-infrared to ultraviolet, holds great promise for developing tunable photonic devices such as multicolor reflectors, filters, and sensors.
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