Octagonal Quasi-Photonic Crystal Single-Defect Microcavity With Whispering Gallery Mode and Condensed Device Size

Lee, Po Tsung; Lu, Tsan-Wen; Tsai, Feng

doi:10.1109/lpt.2007.895054

Cited by 13 publications

(4 citation statements)

References 18 publications

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“…In particular is very interesting to apply the anisotropic property to dielectric rings (DR) illustrated in Figure 1(a). In fact the circular dielectric patterns, 6 10-14 arranged in ring configuration, are suitable for practical applications in which whispering gallery modes (WGM) 11 are requested for high quality factors in large geometrical dimensions. This configuration is also suitable for devices in which the localized bound states, supported by cavity defects, generate different wavelength emissions associated to modes correlated to the polarization.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimisation of WDM Circular Photonic Crystals Characterised by Induced Anisotropy

Massaro¹,

Cingolani²,

Vittorio³

et al. 2010

Jnl of Comp & Theo Nano

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In this work we analyze the birefringence effect in circular photonic crystals such as dielectric rings (DR) and photonic crystals with air holes arranged in circular patterns. The dielectric concentric circular patterns admit two preferred electric fields orthogonal components defined by an extraordinary and an ordinary refractive index. These electric fields, localized in the central region of the circular photonic crystal (CPC) will be radiated at different wavelengths. This behaviour allows to characterize the analysed structures as wavelength division multiplexers. We first analyze the induced anisotropy of the multiplexers, and, then, we study the wavelength selectivity. Similar emitted wavelengths related to a air-hole CPC and to a corresponding DR structure are observed. The multiplexing behaviour is numerically modelled by the finite element method approach which provides the emitted resonant wavelengths and the quality Q-factors for a membrane-type optical wavelength division multiplexer obtained by the CPC design.

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Section: Introductionmentioning

confidence: 99%

Design and Optimisation of WDM Circular Photonic Crystals Characterised by Induced Anisotropy

Massaro¹,

Cingolani²,

Vittorio³

et al. 2010

Jnl of Comp & Theo Nano

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“…1(a) and (b). In fact, the circular dielec-tric patterns [6], [10]- [14], arranged in ring configuration, are suitable for practical applications in which whispering gallery modes (WGMs) [11] (modes with high quality factor) are requested. This configuration is also suitable for devices in which the localized bound states, supported by cavity defects, generate different wavelength emissions associated to degenerate modes correlated to the polarization [6], [15].…”

Section: Introductionmentioning

confidence: 99%

Artificial Anisotropy in Circular Photonic Crystals and Applications

Massaro

Cingolani

Vittorio

et al. 2010

IEEE Trans. Nanotechnology

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In this paper, we analyze the birefringence effect in circular photonic crystals (CphCs). The studied CphCs are dielectric rings (DRs) and photonic crystals with cylindrical air holes arranged in circular patterns. The dielectric concentric circular patterns admit two preferred propagation directions defined by an extraordinary and an ordinary refractive index, representing two electric field polarizations. These electric fields are diffracted inside the crystal or are localized in a central microcavity region. We prove the induced artificial anisotropy in DRs through the geometrical equivalence with the corresponding thin-film multilayer structure. The equivalence is obtained through the geometrical synthesis of the wavefront propagation inside the artificial anisotropic structure. As applications, we analyze a Si/SiO 2 DR Bragg reflector and a GaAs CphC microcavity resonator. The Bragg theory is validated by numerical time-domain approaches that are well suited to solve scattering problems. The microcavity resonance analysis and the Q-factor evaluation are performed by the finite-element method modeling.

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“…The form birefringence performs the important function of separating an incident beam into two orthogonally polarized outgoing parallel beams. Such function can be accomplished by isotropic periodic dielectric structures that can split an incident beam into two preferred directions as in a uniaxial crystal, Bragg reflectors, and polarization splitters [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Previous works have analyzed the form birefringence effect generated in thin dielectric parallel plates [2,5] or in an oblique deposited film composed of dielectric microcolumns and voids [4].…”

Section: Introductionmentioning

confidence: 99%