Fano resonance in a cholesteric liquid crystal with dye

Gevorgyan, A. H.

doi:10.1103/physreve.99.012702

Cited by 8 publications

(3 citation statements)

References 35 publications

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“…This corresponds to the chaotic orientation of the dipole moment of the dye molecules transition. In this case, the presence of dye molecules in the CLC matrix causes the frequency dependence of the main values of the local dielectric tensor, and we assume the Lorentz form of this frequency dependence [ 37 ]. In addition, a small volume concentration of the dye molecules in the CLC matrix is suggested, since the coupling of oscillators through a local field is not taken into account.…”

Section: Description Of the Modelmentioning

confidence: 99%

“…In a dye-doped CLC, a distributed feedback lasing with the lowest laser pumping threshold can be implemented [ 33 , 34 , 35 , 36 ]. The presence of dye molecules can lead to the qualitative rearrangement of the band structure of the CLC spectrum, specifically, to splitting of the photonic band gap (PBG) into several PBGs [ 37 ]. Embedding of a resonant defect layer doped with metal nanoparticles into a CLC adds new features to the spectral and polarization properties of the latter [ 38 ].…”

Section: Introductionmentioning

confidence: 99%

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Chiral Optical Tamm States at the Interface between a Dye-Doped Cholesteric Liquid Crystal and an Anisotropic Mirror

et al. 2020

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The resonant splitting of optical Tamm state numerically is demonstrated. The Tamm state is localized at the interface between a resonant chiral medium and a polarization-preserving anisotropic mirror. The chiral medium is considered as a cholesteric liquid crystal doped with resonant dye molecules. The article shows that the splitting occurs when dye resonance frequency coincides with the frequency of the Tamm state. In this case the reflectance, transmittance, and absorptance spectra show two distinct Tamm modes. For both modes, the field localization is at the interface between the media. The external field control of configurable optical and structural parameters paves the way for use in tunable chiral microlaser.

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Section: Description Of the Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chiral Optical Tamm States at the Interface between a Dye-Doped Cholesteric Liquid Crystal and an Anisotropic Mirror

et al. 2020

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“…So, various systems, including optical cavities, [ 36–39 ] nanoclusters, [ 40–43 ] photonic crystals, [ 44–45 ] gratings, [ 46–49 ] metamaterials, [ 50–53 ] metasurfaces, [ 54–57 ] and many others, [ 58–63 ] have been proposed theoretically and observed experimentally to exhibit Fano resonance. Inspired by recent progress in numerous novel materials, [ 64–69 ] including 2D materials with exotic optoelectronic properties, [ 70–72 ] superconducting materials, [ 73,74 ] phase‐changed materials, [ 75,76 ] low loss dielectric materials [ 77,78 ] and quantum dots, [ 79–82 ] many opportunities to investigate Fano resonance are anticipated.…”

Section: Introductionmentioning

confidence: 99%

Fano Resonance in Artificial Photonic Molecules

Cao

Dong

Zhou

et al. 2020

Advanced Optical Materials

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photonic applications, such as optical switching, [6][7][8][9] sensing, [10][11][12][13][14][15] nonreciprocal propagation, [16][17][18][19][20][21] modulation, [22][23][24][25][26] optical logic gates, [27][28][29] and light buffering and storage. [3,[30][31][32][33][34][35] The Fano line shape profiles are related to the system's structural parameters and the electromagnetic parameters of ambient media. So, various systems, including optical cavities, [36][37][38][39] nanoclusters, [40][41][42][43] photonic crystals, [44][45] gratings, [46][47][48][49] metamaterials, [50][51][52][53] metasurfaces, [54][55][56][57] and many others, [58][59][60][61][62][63] have been proposed theoretically and observed experimentally to exhibit Fano resonance. Inspired by recent progress in numerous novel materials, [64][65][66][67][68][69] including 2D materials with exotic optoelectronic properties, [70][71][72] superconducting materials, [73,74] phase-changed materials, [75,76] low loss dielectric materials [77,78] and quantum dots, [79][80][81][82] many opportunities to investigate Fano resonance are anticipated.It is well-known that the macroscopically arrayed structures are typically too bulky for highly integrated on-chip optical circuits, thus, compact photonic structures are in high demand. [83][84][85] Optical microcavities, with high quality (high-Q) factors, convenient all-optical control, and compatibility with on-chip fabrication, have been used extensively for sophisticated optical devices, such as isolators, [86] lasers, [87] circuits, [88] sensors, [89][90][91] and buffers, [92,93] with distinctive properties. Based on the similarities between the classical electromagnetism and quantum mechanics, a single cavity and coupled-cavity can be referred to as artificial photonic atom and photonic molecule, [94][95][96] respectively. Analogous to the single atom molecule, a single cavity can also be referred to as a photonic molecule. The spectral response arising from the coherent interaction of optical modes depends heavily on the configuration of the artificial photonic molecules. [97][98][99] Over the years, sorts of photonic molecules have been implemented as key building blocks for realizing Fano resonance, [83,85,[88][89][90][91]100,101] thanks to the interactions between optical modes as illustrated in Figure 1a. The Fano profiles have been both experimentally and theoretically studied with numerous interesting physical phenomena revealed by the coupled oscillator model, [83,86,102] temporal coupled-mode theory, [103][104][105][106][107] transfer matrix method, [108][109][110] and quantumoptics approach. [111,112] In this work, we focus on reviewing the Fano resonance in artificial photonic molecules. We first introduce the properties of Fano resonance. Specifically, we discussThe spectral signatures of chemical molecules are dependent on the hybridization of electronic states. The artificial photonic molecules formed by structured optical microcavities, exhibiting Fano features with sharp asymmetric line shape a...

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