Single channel tunable wavelength demultiplexer using nonlinear one dimensional defect mode photonic crystal

Sharma, Sanjeev; Kumar, Rajendra; Singh, Kuldeep; Kumar, Vipin; Kumar, Arun

doi:10.1016/j.ijleo.2014.04.034

Cited by 11 publications

(1 citation statement)

References 17 publications

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“…Normally, the transmission properties of the defect mode can be easily modified by appropriately altering the optical thickness of Bragg reflectors. It has been shown that the increased number of periods in Bragg reflectors enables a significant improvement in the Q-factor and light confinement effect of the defect mode, yielding an enhancement of nonlinear optical properties [14][15][16]. However, by doing this, the structure volume is bound to increase; meanwhile, the transmission coefficient will inevitably decline to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

Bistable Switch Based on Tunable Fano Resonance in Coupled Resonator-Cavity Structure

et al. 2023

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We report a side-coupled resonator-cavity configuration with a tunable Fano-type interference effect for a novel subwavelength switch. A defective microstrip photonic crystal (PC) structure is designed to provide a continuum state, while a split ring resonator (SRR) is introduced to offer a narrow discrete resonance. The SRR is conductively side-coupled with the microstrip PC cavity in a subwavelength volume. Interactions between them result in Fano-type transmitting spectra with a sharp and asymmetric spectral line profile. A varactor diode serving as the nonlinear medium inclusion is integrated into the slit of the SRR for active control of the sharp Fano resonance. The strongly localized field produced by Fano resonance plays a role in improving the nonlinear properties of the microstrip PC cavity. It is found that a significant blue shift of 94 MHz on the Fano resonance frequency can be achieved by increasing the input power levels from −25 dBm to 8 dBm. We also found that the maximum transmission contrast exceeding 15.9 dB can take place between two bistable states existing at 3.05 dBm and 4.32 dBm for a bidirectional sweep of input power under a monochromatic signal frequency of 1.27 GHz. The findings may benefit the exploitation of metamaterials-assisted active photonic nanocircuits.

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Section: Introductionmentioning

confidence: 99%

Bistable Switch Based on Tunable Fano Resonance in Coupled Resonator-Cavity Structure

et al. 2023

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Numerical analysis of tunable defect mode in cylindrical photonic crystals configuration

El‐Naggar

Nguyen

Dhasarathan

2020

Micro & Optical Tech Letters

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In contrast to most of the previous publications that has addressed the dependency of the defect mode on temperature in planner one‐dimensional photonic crystal, we study this dependency in cylindrical photonic crystal taking into consideration both thermal‐optical and thermal expansion effects. Our analysis, based on the cylindrical transfer matrix, is conducted for both types of polarized electric and magnetic waves. Our structure is composed of arrays of cylindrical coaxial shells of TiO2 and Al2O3 with single defect layer. Numerical results show that the defect mode's wavelength can be effectively tuned, following a linear relation, by changing the temperature for both types of polarized waves. In addition, the peak transmittance is dependent on the number of periods and the starting inner radius. Moreover, decreasing the inner radius is associated with separation between the two polarizations.

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Optimizing and Validating Performance of 40 Gbps Optical System

Gupta¹,

Choudhary²,

Babulal

et al. 2023

Lecture Notes in Electrical Engineering

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Single channel tunable wavelength demultiplexer using nonlinear one dimensional defect mode photonic crystal

Cited by 11 publications

References 17 publications

Bistable Switch Based on Tunable Fano Resonance in Coupled Resonator-Cavity Structure

Bistable Switch Based on Tunable Fano Resonance in Coupled Resonator-Cavity Structure

Numerical analysis of tunable defect mode in cylindrical photonic crystals configuration

Optimizing and Validating Performance of 40 Gbps Optical System

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