Tunable hybrid optical modes in a bounded cholesteric liquid crystal with a twist defect

Pyatnov, Maxim V.; Vetrov, S. Ya.; Timofeev, Ivan V.

doi:10.1103/physreve.97.032703

Cited by 7 publications

(4 citation statements)

References 49 publications

(42 reference statements)

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“…Insertion of defects into the structure of a PC may expand the possibilities of controlling electromagnetic radiation. As has been shown, the systems that consist of CLCs separated by defects of various kinds can emit at the frequencies corresponding to defect-localized photonic states [20,[29][30][31][32]. This circumstance is used when creating low-threshold lasers.…”

Section: Introductionmentioning

confidence: 99%

“…For example, volume many-directional bandgap reflection of light by PCs is used in wide-angle optical splitters [4,5], which is critical while creating tightly packed optical microcircuits. Also it is possible to create on the basis of PCs the frequency splitters [6,7], optical logic gates [8], lasers [9,10], sensors, optical filters [11][12][13][14][15][16][17] and other devices [18][19][20]. Recently, a significant amount of interest has been evoked by chiral PC microstructured fibers [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Topological charge conversion and localization in defected heterogeneous multihelicoidal optical fibers

Alexeyev¹,

Barshak²,

Lapin³

et al. 2019

J. Opt.

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In this paper, we have theoretically studied the processes of topological charge conversion in heterogeneous, that is, with an alternating chirality, multihelicoidal fibers in the presence of twist defects. We have shown that two-part and three-part multihelicoidal fibers of that type can be used as compact topological charge all-fiber inverters and comb filters for optical vortices. Also, we have studied the emergence of topologically charged states localized on twist defects in such fibers. We have demonstrated that such states can emerge only in multihelicoidal fibers comprising three parts with alternating chirality. The obtained results can be readily scaled to the terahertz range.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Topological charge conversion and localization in defected heterogeneous multihelicoidal optical fibers

Alexeyev¹,

Barshak²,

Lapin³

et al. 2019

J. Opt.

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“…OTS is a surface wave that is confined on the interface of two different media. It has grabbed the attention of researchers due to its strong locality to light and being easily excited [21][22][23][24][25]. In this paper, we proposed a novel structure consists of graphene and optical lattice; it can realize the enhancement of reflected group delay and switch between positive reflected group delay and negative reflected group delay of optical pulse.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror Configuration

Tang

Zhou

et al. 2019

Advances in Condensed Matter Physics

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Group delay of the optical pulse reflected from the structure composed of graphene and one dimensional photonic crystal (1D PC) is studied. It is shown that the large negative group delay in this configuration can be realized due to the excitation of the optical Tamm state (OTS) at a graphene-dielectric interface. The reflected group delay can be enlarged negatively and can be switched from positive to negative or vice versa. We show that the conductivity of graphene has a significant influence on reflected group delay, making the graphene-PC structure be a good candidate for dynamic tunable optical delay device in the THz frequencies. Furthermore, the influences of the relaxation time of graphene, the incident angel, and the dispersion characteristics of top layer on group delay are clarified.

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“…The Tamm modes can be strongly coupled with each other or with resonances of a different nature, e.g., the cavity modes, exciton polaritons, and surface plasmons [17][18][19][20][21]. Such hybrid modes are characterized by the resonance quasi-crossing at the detuning of the position of one of the resonances, which is widely used in sensors [22,23].…”

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confidence: 99%

Model of a tunable hybrid Tamm mode–liquid crystal device

et al. 2020

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A concept of an easily tunable device based on hybrid Tamm modes is proposed. The device can be controlled using a high-sensitivity chiral liquid crystal serving as a mirror. The coupling of the chiral optical Tamm state with the Tamm plasmons is predicted. The Tamm plasmons are excited at different frequencies for the orthogonal linear polarizations, while the chiral Tamm state is excited at only one frequency. The properties of the proposed model are analytically and numerically calculated. The possibility of creating a two-and three-mode laser with tunable characteristics on the basis of the proposed model are discussed.

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Tunable hybrid optical modes in a bounded cholesteric liquid crystal with a twist defect

Cited by 7 publications

References 49 publications

Topological charge conversion and localization in defected heterogeneous multihelicoidal optical fibers

Topological charge conversion and localization in defected heterogeneous multihelicoidal optical fibers

Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror Configuration

Model of a tunable hybrid Tamm mode–liquid crystal device

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