Polarization-dependent filters based on chiral photonic structures with defects

Chen, Jiun-Yeu; Chen, Lien-Wen

doi:10.1088/1464-4258/7/10/007

Cited by 16 publications

(9 citation statements)

References 26 publications

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“…In this study we consider the proposed photonic structure is lossless, therefore, the energy flux is conserved at the resonant wavelength and the group velocity is inversely related to the energy density [14,15,46,47]. Group velocity also provides information of time delay of the light transmission at resonant modes; the smaller the group velocity is, the longer time the response may take [44].…”

Section: Energy Density Distribution and Group Velocitymentioning

confidence: 99%

Phase Shift Defect Modes in One-Dimensional Asymmetrical Photonic Structures Consisting of Two Rugate Segments With Different Periodicities

Liu¹,

Lu²

2011

PIER

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Abstract-A theoretical study of optical properties of phase shift defects in one-dimensional asymmetrical photonic structures consisting of two rugate segments with different periodicities at both normal and oblique incidence is presented. Using the propagation matrix method we numerically calculated transmittance spectra, defect wavelengths, energy density distributions, and group velocities for TE and TM waves, respectively. Our study shows that by adjusting the periodicity of one rugate segment, the defect wavelengths can be shifted toward either a shorter wavelength or a longer wavelength. The differences of the energy density distributions of TE and TM waves at different angles of incidence are explained with the help of group velocity. Effects of the change of the period of one rugate segment on the peak energy densities of defect modes and minimum group velocities at different angles of incidence are also investigated.

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Section: Energy Density Distribution and Group Velocitymentioning

confidence: 99%

Phase Shift Defect Modes in One-Dimensional Asymmetrical Photonic Structures Consisting of Two Rugate Segments With Different Periodicities

Liu¹,

Lu²

2011

PIER

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“…Defect modes in CLCs have received much attention because they are known to play the key part in photonic devices such as low-threshold lasers [14,15,16,17] and polarization dependent filters [18]. But, in the bulk of studies, a major focus of interest is the case of normal incidence where the waves propagate along the helical axis, whereas effects due to oblique incidence (off-axis propagation ) have not yet been adequately explored.…”

Section: Introductionmentioning

confidence: 99%

Conoscopic patterns in photonic band gap of cholesteric liquid crystal cells with twist defects

Egorov

Kiselev

2010

Appl. Phys. B

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We theoretically investigate into the effects of the incidence angles in light transmission of cholesteric liquid crystal two-layer sandwich structures with a twist defect created by rotation of the one layer about the helical axis. The conoscopic images and polarization resolved patterns are obtained for thick layers by computing the intensity and the polarization parameters as a function of the incidence angles. In addition to the defect angle induced rotation of the pictures as a whole, the rings of defect mode resonances are found to shrink to the central point and disappear as the defect twist angle varies from zero to its limiting value π/2 and beyond.

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“…Recently, CPCs having various types of defects have been considered, namely: a thin layer of an isotropic substance installed between two CPC layers [12][13][14][15][16][17]; a defect caused by the helix phase jump on the boundary of two CPC layers [14,[18][19][20]; a defect caused by a local change of the helix pitch [21][22][23]; and defects caused by spatially varying helix pitch [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Tuning of emission wavelength in chiral photonic crystals with an anisotropic defect layer

Gevorgyan

Harutyunyan

2009

Journal of Modern Optics

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We considered some properties of defect modes in chiral photonic crystals with an anisotropic defect layer at oblique light incidence. The problem was solved by Ambartsumian's layer addition method. We investigated some peculiarities of the discussed system's reflection spectra and also the polarization plane rotation spectra and polarization ellipticity spectra of the oblique light incidence for both the minimum and essential influence of the dielectric borders. Our investigations show that there is a possibility of rather a wide change of the emission wavelength in the subject system by changing the incidence angle, or by changing the doped dye concentration, or by changing the pumping wave intensity. We also investigated absorption (emission) peculiarities at different dye molecule concentration and at different chiral photonic crystal thicknesses.

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Polarization-dependent filters based on chiral photonic structures with defects

Cited by 16 publications

References 26 publications

Phase Shift Defect Modes in One-Dimensional Asymmetrical Photonic Structures Consisting of Two Rugate Segments With Different Periodicities

Phase Shift Defect Modes in One-Dimensional Asymmetrical Photonic Structures Consisting of Two Rugate Segments With Different Periodicities

Conoscopic patterns in photonic band gap of cholesteric liquid crystal cells with twist defects

Tuning of emission wavelength in chiral photonic crystals with an anisotropic defect layer

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