A Tunable Multichannel Filter Based on Photonic Crystal

Hu, Cong; Ji, Jinyue; Tian, Zhong‐Qun; Wan, Chunting; Xu, Chuanpei; Zhu, Aijun

doi:10.1007/s12633-022-02159-8

Cited by 11 publications

(4 citation statements)

References 26 publications

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“…In another promising work by Cong et al [110] a hexagonal resonator made of GSST 2241 , GSST 2241 embedded in a Si photonic crystal structure was proposed. The device covering an area of 74.05 um 2 operates in a 1310-1510 nm window with transmission efficiency greater than 99% and Q-factor as high as 10 3 .…”

Section: Loading On Nanostructured Componentsmentioning

confidence: 99%

Recent developments in Chalcogenide phase change material-based nanophotonics

Tripathi,

Vyas,

Kumar

et al. 2023

Nanotechnology

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There is now a deep interest in actively reconfigurable nanophotonics as they will enable the next generation of optical devices. Of the various alternatives being explored for reconfigurable nanophotonics, Chalcogenide phase change materials (PCMs) are considered highly promising owing to the nonvolatile nature of their phase change. Chalcogenide PCM nanophotonics can be broadly classified into integrated photonics (with guided wave light propagation) and Meta-optics (with free space light propagation). Despite some early comprehensive reviews, the pace of development in the last few years has shown the need for a topical review. Our comprehensive review covers recent progress on nanophotonic architectures, tuning mechanisms, and functionalities in tunable PCM Chalcogenides. In terms of integrated photonics, we identify novel PCM nanoantenna geometries, novel material utilization, the use of nanostructured waveguides, and sophisticated excitation pulsing schemes. On the meta-optics front, the breadth of functionalities has expanded, enabled by exploring design aspects for better performance. The review identifies immediate, and intermediate-term challenges and opportunities in (1) the development of novel chalcogenide PCM, (2) advance in tuning mechanism, and (3) formal inverse design methods, including machine learning augmented inverse design, and provides perspectives on these aspects. The topical review will interest researchers in further advancing this rapidly growing subfield of nanophotonics.

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Section: Loading On Nanostructured Componentsmentioning

confidence: 99%

Recent developments in Chalcogenide phase change material-based nanophotonics

Tripathi,

Vyas,

Kumar

et al. 2023

Nanotechnology

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“…[33,34] A microcavity [35] refers to a microresonator with a size in the order of wavelength. The study of microcavities has made it possible to integrate devices such as optical filters, [36] optical modulators/demodulators, and optical logic gates, enabling a wide range of applications in fundamental physics research and device applications. [37,38] However, micro-resonant cavities can suffer from increased losses due to fabrication defects and disorder.…”

Section: Introductionmentioning

confidence: 99%

Topological resonators based on hexagonal-star valley photonic crystals

Wan 万,

Peng 彭,

Li 李

et al. 2023

Chinese Phys. B

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In valley photonic crystals, topological edge states can be gained by breaking the spatial inversion symmetry without breaking time-reversal symmetry or creating pseudo-spin structures, making highly unidirectional light transmission easy to achieve. This paper presents a novel physical model of a hexagonal-star valley photonic crystal. Simulations based on the finite element method (FEM) are performed to investigate the propagation of TM polarized mode and its application to ring resonators. The results show that such a topologically triangular ring resonator exhibits an optimum quality factor Q of about 1.25 × 104, and Q has a maximum value for both frequency and the cavity length L. Our findings are expected to have significant implications for developing topological lasers and wavelength division multiplexers.

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“…Signi cant attempts have been made to study the theoretical and experimental properties of optical devices based on photonic crystal couplers with the aim of achieving shorter coupling lengths and improved performance [4][5][6][7]. Photonic crystal couplers play a crucial role in many optical communication systems such as optical logic gates [8,9] ,optical splitter [10,11] ,optical switches [12][13][14],sensors [15,16], lters [17,18],and demultiplexers [19][20][21][22]. These devices provide advantages such as reduced crosstalk, compact size and high e ciency.…”

Section: Introductionmentioning

confidence: 99%

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

Chergui,

Labbani

2023

Silicon

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In this paper, a novel method to diminish the coupling length and enhance the coupling coe cient in a two-dimensional (2D) photonic crystal (PC) directional coupler (DC)is investigated. The DC comprises two closely spaced linear waveguides separated by one row of silicon columns. In this new approach, we used core/shell (C/S) rods between the waveguides to reduce the coupling length. The C/S rod is obtained by etching a hole in the middle of the silicon rod. This modi cation leads to a very short coupling length of 5a, where a is the lattice constant of the structure. Simulation results show that increasing the inner core radius increases the coupling coe cient. The coupling properties have been numerically simulated and analyzed using the nite difference time domain (FDTD) and the plane-wave expansion (PWE) methods. Based on the modi ed structure, we analyzed the output spectrum of a very compact channel drop lter. The proposed modi ed design would offer signi cant potential for novel ultrasmall devices based on photonic crystal couplers.

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A Tunable Multichannel Filter Based on Photonic Crystal

Cited by 11 publications

References 26 publications

Recent developments in Chalcogenide phase change material-based nanophotonics

Recent developments in Chalcogenide phase change material-based nanophotonics

Topological resonators based on hexagonal-star valley photonic crystals

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

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