Single-Port Coherent Perfect Loss in a Photonic Crystal Nanobeam Resonator

We numerically demonstrated single-port coherent perfect loss (CPL) with a Fabry–Perot resonator in a photonic crystal (PC) nanobeam by using a perfect magnetic conductor (PMC)-like boundary. The CPL mode with even symmetry can be reduced to a single-port CPL when a PMC boundary is applied. The boundary which acts like a PMC boundary, here known as a PMC-like boundary, and can be realized by adjusting the phase shift of the reflection from the PC when the wavelength of the light is within the photonic bandgap wavelength range. We designed and optimized simple Fabry–Perot resonator and coupler in nanobeam to get the PMC-like boundary. To satisfy the loss condition in CPL, we controlled the coupling loss in the resonator by modifying the lattice constant of the PC used for coupling. By optimizing the coupling loss, we achieved zero reflection (CPL) in a single port with a PMC-like boundary.

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Supercontinuum generation in photonic crystal fibers infiltrated with tetrachloroethylene

Optical and Quantum Electronics ◽

10.1007/s11082-021-02820-3 ◽

2021 ◽

Vol 53 (4) ◽

Author(s):

Hieu Van Le ◽

Van Thuy Hoang ◽

Hue Thi Nguyen ◽

Van Cao Long ◽

Ryszard Buczynski ◽

...

Keyword(s):

Photonic Crystal ◽

Lattice Constant ◽

Wavelength Range ◽

Pump Pulse ◽

Filling Factor ◽

Photonic Crystal Fibers ◽

Fused Silica ◽

Anomalous Dispersion ◽

Central Wavelength ◽

Crystal Fibers

AbstractThis study proposes a photonic crystal fiber made of fused silica glass, with the core infiltrated with tetrachloroethylene (C2Cl4) as a new source of supercontinuum (SC) spectrum. We studied numerically the guiding properties of the several different fiber structures in terms of characteristic dispersion, mode area, and attenuation of the fundamental mode. Based on the results, the structural geometries of three C2Cl4-core photonic crystal fibers were optimized in order to support the broadband SC generations. The first fiber structure with lattice constant 1.5 μm and filling factor 0.4 operates in all-normal dispersion. The SC with a broadened spectral bandwidth of 0.8–2 μm is generated by a pump pulse with a central wavelength of 1.56 μm, 90 fs duration and energy of 1.5 nJ. The second proposed structure, with lattice constant 4.0 μm and filling factor 0.45, performs an anomalous dispersion for wavelengths longer than 1.55 μm. With the same pump pulse as the first fiber, we obtained the coherence SC spectrum in an anomalous dispersion range with wavelength range from 1 to 2 μm. Meanwhile, the third selected fiber (lattice constant 1.5 μm, filling factor 0.55) has two zero dispersion wavelengths at 1.04 μm and 1.82 μm. The octave-spanning of the SC spectrum formed in this fiber was achieved in the wavelength range of 0.7–2.4 μm with an input pulse whose optical properties are 1.03 μm wavelength, 120 fs duration and energy of 2 nJ. Those fibers would be good candidates for all-fiber SC sources as cost-effective alternatives to glass core fibers.

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High-Directivity Patch Antenna with both Perfect Magnetic Conductor Substrate and Photonic Bandgap Cover

2005 Asia-Pacific Microwave Conference Proceedings ◽

10.1109/apmc.2005.1606209 ◽

2006 ◽

Author(s):

Fangming Zhu ◽

Qingchun Lin

Keyword(s):

Patch Antenna ◽

Photonic Bandgap ◽

Magnetic Conductor ◽

Perfect Magnetic Conductor

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Construction of Optical Topological Cavities Using Photonic Crystals

Frontiers in Physics ◽

10.3389/fphy.2021.697719 ◽

2021 ◽

Vol 9 ◽

Author(s):

Meng Yuan ◽

Tao Xu ◽

Zhi Hong Hang

Keyword(s):

Photonic Crystal ◽

Photonic Crystals ◽

Cavity Mode ◽

Photonic Bandgap ◽

Optical Cavity ◽

Mode Selection ◽

Interface State ◽

Interface States ◽

Reflection Phase ◽

Fabry Perot

A novel design of the Fabry–Pérot optical cavity is proposed, utilizing both the topological interface state structures and photonic bandgap materials with a controllable reflection phase. A one-to-one correspondence between the traditional Fabry–Pérot cavity and optical topological cavity is found, while the tunable reflection phase of the photonic crystal mirrors provides an extra degree of freedom on cavity mode selection. The relationship between the Zak phase and photonic bandgap provides theoretical guidance to the manipulation of the reflection phase of photonic crystals. The dispersions of interface states with different topology origins are explored. Linear interfacial dispersion emerging in photonic crystals with the valley–spin Hall effect leads to an extra n = 0 cavity mode compared to the Zak phase–induced deterministic interface states with quadratic dispersion. The frequency of the n = 0 cavity mode is not affected by the cavity length, whose quality factor can also be tuned by the thickness of the photonic crystal mirrors. With the recent help of topology photonics in the tuning reflection phase and dispersion relationship, we hope our results can provide more intriguing ideas to construct topological optical devices.

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Wideband Visible Wavelength Range MEMS Fabry-Perot Tunable Filter with Ag Alloy Mirror

IEEJ Transactions on Sensors and Micromachines ◽

10.1541/ieejsmas.132.25 ◽

2012 ◽

Vol 132 (2) ◽

pp. 25-30 ◽

Cited By ~ 2

Author(s):

Nozomu Hirokubo ◽

Hiroshi Komatsu ◽

Nobuaki Hashimoto ◽

Makoto Sonehara ◽

Toshiro Sato

Keyword(s):

Wavelength Range ◽

Tunable Filter ◽

Visible Wavelength ◽

Visible Wavelength Range ◽

Fabry Perot

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Self-Assembled Silica Photonic Crystal as a Liquid-Crystal Alignment Layer and its Electro-optic Applications in Fabry-Perot Cavity Structures

Advanced Materials ◽

10.1002/adma.200400743 ◽

2004 ◽

Vol 16 (19) ◽

pp. 1725-1729 ◽

Cited By ~ 12

Author(s):

N. Y. Ha ◽

Y. K. Woo ◽

B. Park ◽

H. Takezoe ◽

J. W. Wu

Keyword(s):

Liquid Crystal ◽

Photonic Crystal ◽

Alignment Layer ◽

Liquid Crystal Alignment ◽

Electro Optic ◽

Fabry Perot ◽

Crystal Alignment ◽

Self Assembled

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Coupling loss attributes of large mode-area hexagonal photonic crystal fibers in presence of misalignments: an alternative optical model

Optical and Quantum Electronics ◽

10.1007/s11082-020-02710-0 ◽

2021 ◽

Vol 53 (2) ◽

Author(s):

Dinesh Kumar Sharma ◽

Saurabh Mani Tripathi

Keyword(s):

Photonic Crystal ◽

Optical Model ◽

Photonic Crystal Fibers ◽

Coupling Loss ◽

Large Mode Area ◽

Crystal Fibers ◽

Mode Area

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Rotating 1-D magnetic photonic crystal balls with a tunable lattice constant

Nanoscale ◽

10.1039/c7nr03335d ◽

2017 ◽

Vol 9 (27) ◽

pp. 9548-9555 ◽

Cited By ~ 22

Author(s):

Wei Luo ◽

Jindan Yan ◽

Yali Tan ◽

Huiru Ma ◽

Jianguo Guan

Keyword(s):

Magnetic Field ◽

Photonic Crystal ◽

Lattice Constant ◽

Lattice Constants ◽

Magnetic Photonic Crystal

1-D magnetic photonic crystal balls with uniform colors can be smoothly rotated by magnetic field even when the lattice constants change with stimuli.

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