Advances in Photonic Crystals and Devices

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (10 December 2023) | Viewed by 3142

Special Issue Editors


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Guest Editor
State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai, China
Interests: photonic crystals; photonic crystal devices; nanotechnology; optics physics; theoretical models

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Co-Guest Editor
School of Material Science and Physics (CUMT), China University of Mining and Technology, Beijing 100083, China
Interests: photonic crystals; metamaterials; plasmonics; low-dimensional materials

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Co-Guest Editor
College of Physics, Chongqing University, Chongqing 400044, China
Interests: micro- and nano-photonic structure; photonic crystal; plasmonicsmeta-material; topological and quantum-like effects

Special Issue Information

Dear Colleagues,

The field of photonic crystals (PhCs) based on artificial nanostructures is a booming area of optics that has attracted much attention from experimental and theoretical chemists and physicists since its discovery in 1987 by John and Yablonovitch. In recent decades, the exciting physical and chemical phenomena of PhCs have been widely predicted and researched. More reliable and precise PhC devices are continuously being proposed because of new developments in advanced nanofabrication technology. Extensive applications based on PhCs have emerged, including PhC fibers, white light sources, tunable filters, PhC quantum dot lasers, and PhC quantum cascade lasers. However, most of the PhC devices have optical properties which cannot be actively tuned. Are there other cases for tunable photonic crystal devices? For instance, can we tune the optical properties of PhC devices through applied mechanical force, or through an external field? Answering these questions will help PhC devices meet the requirements of society. The present Special Issue on “Active Photonic Crystals and Devices” may become a timely report, summarizing the current progress in the field of tunable PhC devices achieved in recent years.

Dr. Xiaolong Zhu
Dr. Weihua Wang
Prof. Dr. Dezhuan Han
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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Keywords

  • photonic crystals
  • photonic band structure
  • photonic crystal devices
  • high-quality factor
  • nonlinear optics
  • optical properties
  • transport properties
  • theoretical models

Published Papers (2 papers)

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Research

10 pages, 2362 KiB  
Article
Band Broadening of Terahertz Photonic Crystals Circulator Using Two Symmetrical Hexagonal Aluminum Sheets
by Yong Wang, Biaogang Xu, Kaiming Chang, Hongwei Huang, Zhuozi Xu, Wenlong He and Wenli Wang
Crystals 2023, 13(5), 779; https://doi.org/10.3390/cryst13050779 - 07 May 2023
Viewed by 1206
Abstract
Future 6G communication systems will require wideband nonreciprocal devices in the terahertz frequency domain. A novel ultra-wideband terahertz circulator is implemented by inserting a NixZn1−xFe2O4 ferrite sphere into the Al2O3 dielectric rod-array. The [...] Read more.
Future 6G communication systems will require wideband nonreciprocal devices in the terahertz frequency domain. A novel ultra-wideband terahertz circulator is implemented by inserting a NixZn1−xFe2O4 ferrite sphere into the Al2O3 dielectric rod-array. The operating bandwidth of the circulator is broadened to 40 GHz via the external matching method through two hexagonal aluminum sheets. The three-dimensional numerical simulation suggests that the designed circulator also has an excellent insertion loss and isolation of 49.37 dB and 0.56 dB, respectively, via the finite element method. The low loss, high isolation and ultra-wideband show that the proposed scheme provides an effective path for realizing high-performance THz devices. Full article
(This article belongs to the Special Issue Advances in Photonic Crystals and Devices)
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10 pages, 1707 KiB  
Article
Bending 90° Waveguides in Nd:YAG Crystal Fabricated by a Combination of Femtosecond Laser Inscription and Precise Diamond Blade Dicing
by Hao Zha, Yicun Yao, Minghong Wang, Nankuang Chen, Liqiang Zhang, Chenglin Bai, Tao Liu, Yingying Ren and Yuechen Jia
Crystals 2023, 13(2), 188; https://doi.org/10.3390/cryst13020188 - 20 Jan 2023
Cited by 2 | Viewed by 1438
Abstract
In this paper, a low-loss 90°-bending design in femtosecond laser-induced double-line waveguides is theoretically proposed and experimentally demonstrated. The bending is realized based on the total internal reflection of a corner mirror (made by precise diamond blade dicing) located at the intersection of [...] Read more.
In this paper, a low-loss 90°-bending design in femtosecond laser-induced double-line waveguides is theoretically proposed and experimentally demonstrated. The bending is realized based on the total internal reflection of a corner mirror (made by precise diamond blade dicing) located at the intersection of a pair of waveguides perpendicular to each other. The waveguide bending performance was birefringence free, with the insertion loss of each bending below 0.8 dB. This method provides great flexibility and has great potential for the design of integrated photonics based on femtosecond laser-inscribed crystalline materials. Full article
(This article belongs to the Special Issue Advances in Photonic Crystals and Devices)
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