Photonic Crystals: Physics and Applications

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

Deadline for manuscript submissions: closed (15 October 2023) | Viewed by 3594

Special Issue Editor


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Guest Editor
Graduate Institute of Automation Technology, National Taipei University of Technology, Taipei 10608, Taiwan
Interests: photonic crystals; plasmonics; laser; sensor; waveguide; artificial intelligence

Special Issue Information

Dear Colleagues,

Inspired by naturally astonishing photonic crystals, photonic crystals have become one of the major structures to manipulate light. The periodic dielectric function in photonic crystals leads to the photonic band structure, which is similar to the electronic band structures of atomic crystals in semiconductors. Photonic crystals have a large number of applications. They are widely used by 1D gratings or distributed feedback structures as resonance cavities for generating photons. Their light confinement ability creates not only diverse micro-structured optical fibers, but also nano-structured waveguides in semiconductors. The light manipulation of photonic crystals is also exhibited in beam splitters, filters, metamaterials, etc. With the high quality factor and the high wavelength sensitivity, photonic crystals can be applied to multidisciplinary fields of sensors (gas sensors or biosensors). Furthermore, the optical nonlinearity of photonic crystals may pave the way for optical computers. This Special Issue, entitled “Photonic Crystals: Physics and Applications,” will cover the recent achievements related to this topic, and, thus, I warmly invite you to contribute to this Special Issue by submitting your original research articles.

Dr. Shih-Wen Chen
Guest Editor

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Keywords

  • photonic crystals
  • optical resonance cavity
  • optical sensors
  • waveguide
  • laser
  • fiber
  • imaging
  • liquid crystals
  • photovoltaics
  • optical computing
  • metamaterial
  • lithography
  • nanotechnology
  • spectroscopy

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Published Papers (2 papers)

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Research

23 pages, 6598 KiB  
Article
A Polished-D-Shape SPR-Based Photonic Crystal Fiber Sensor with High Sensitivity for Measuring Refractive Index
by Wangyoyo Li, Menglin Jiang, Jianjie Xu, Yu Chen and Hui Zou
Crystals 2023, 13(8), 1282; https://doi.org/10.3390/cryst13081282 - 19 Aug 2023
Cited by 2 | Viewed by 1215
Abstract
In the correspondence, a novel polished-D-shape photonic crystal fiber sensor structure on the basis of surface plasmon resonance is proposed for measuring analyte refractive index. With the help of the finite element method, sensing performances of the structure have been analyzed through numerical [...] Read more.
In the correspondence, a novel polished-D-shape photonic crystal fiber sensor structure on the basis of surface plasmon resonance is proposed for measuring analyte refractive index. With the help of the finite element method, sensing performances of the structure have been analyzed through numerical simulations along with a step-by-step optimization. In this design, different capillaries are gathered and processed to form a D-shape silica structure and nano-scale gold material is coated on the flattened surface. With utilization of a thin gold film and solid silica background, the resonance effect is excited and the loss curve has red shift along with an increase in refractive index, which is applied for sensing. From the simulation and calculation results, the final sensor structure achieves the optimal performance where values of maximum and average sensitivity reach 32,000 and 12,167 nm/RIU along with a sensing coverage of refractive index from 1.26 to 1.32. Also, the proposed design obtains a range of resonant wavelength from 1810 to 2540 nm. We believe the proposed sensor can be a potential candidate for organic and biological detection and related applications. Full article
(This article belongs to the Special Issue Photonic Crystals: Physics and Applications)
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11 pages, 4269 KiB  
Article
Design and Performance Analysis of Perovskites Unidimensional Photonic Crystal-Based Biosensors for Extracellular Vesicles Detection: A Numerical Investigation
by Abdelkader Abderrahmane, Khaled Senouci, Belkacem Hachemi and Pil Ju Ko
Crystals 2023, 13(6), 945; https://doi.org/10.3390/cryst13060945 - 12 Jun 2023
Viewed by 1430
Abstract
In recent years, unidimensional photonic crystal-based biosensors have attracted significant attention due to their potential for label-free bio-detection of cells, proteins, and other organic molecules. These biosensors are based on alternating materials with different refractive indices and a cavity region in which biomolecules [...] Read more.
In recent years, unidimensional photonic crystal-based biosensors have attracted significant attention due to their potential for label-free bio-detection of cells, proteins, and other organic molecules. These biosensors are based on alternating materials with different refractive indices and a cavity region in which biomolecules can be injected. In this study, we investigated numerically the optical properties of unidimensional photonic crystals based on [LiTaO3/MgF2], [LiTaO3/SiO2], [PbTiO3/MgF2], and [PbTiO3/SiO2] heterostructures, and focused our discussion on the detection of four kinds of extracellular vesicles. Our results demonstrated that the [PbTiO3/MgF2] photonic crystal biosensor exhibited the best biosensing performance, with a maximum value of the sensitivity of 511.3 nm/RIU. This study provides valuable insights into the use of perovskites materials, in particular, LiTaO3 and PbTiO3 for photonic crystal-based biosensors for various applications, including disease diagnosis and monitoring therapy responses. Full article
(This article belongs to the Special Issue Photonic Crystals: Physics and Applications)
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