Optical Metamaterials for Advanced Optoelectronic Devices

Dear Colleagues,

Optical metamaterials refer to artificially designed structures with dimensions close to or smaller than the wavelength of light that enable the control of light intensity, polarization state, and phase, among other optical properties.

Optical metamaterials are a highly sought-after and broadly applicable cutting-edge frontier technology with applications in fields such as optical fibers, medical devices, aerospace, sensors, infrastructure monitoring, smart solar management, radar antennas, acoustic cloaking technology, terahertz, microelectronics, absorbing materials, holography, and more.

This Special Issue aims to provide a broad overview of the research trends in optical metamaterials, with a particular emphasis on their applications in advanced optoelectronic devices. We cordially invite researchers to submit manuscripts to this Special Issue. Research areas may include (but are not limited to) the following:

• Metasurfaces;
• Metamaterials and structured photonic materials;
• Advanced optics;
• Low-dimensional structures;
• Light field regulation;
• Topological photonics;
• Quantum metamaterials;
• Non-reciprocal optics;
• Nonlinear and ultrafast optics;
• Metalens.

Dr. Jining Li
Dr. Yue Yang
Dr. Dexian Yan
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.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• metasurfaces
• advanced optics
• integrated optics
• metalens
• topological photonics

Title: Model calculation of enhanced light absorption efficiency in 2D photonic crystal phosphor filmsr
Authors: Taehun Kim 1; Prof. Kyungtaek Min (corresponding author) 2, 3
Affiliation: 1 Department of IT-Semiconductor Convergence Engineering, Tech University of Korea, Siheung 15073, Republic of Korea 2. Department of IT-Semiconductor Convergence Engineering, Tech University of Korea, Siheung 15073, Republic of Korea 3. Department of Nano and Semiconductor Engineering, Tech University of Korea, Siheung 15073, Republic of Korea
Abstract: When a phosphor film based on a photonic crystal (PhC) is excited at the photonic band-edge (PBE) wavelength, the absorption of excitation light increases, potentially enhancing color conversion efficiency. In this study, we modeled a two-dimensional (2D) PhC quantum dot (QD) film with a square-lattice structure using the finite-difference time-domain (FDTD) method to theoretically investigate its optical properties. Specifically, embedding a thin film layer with a high refractive index on the surface of the QD film enables effective localization of excitation light within the phosphor. Numerical analysis estimates that the optimized 2D PhC QD film can enhance light absorption by up to 4.2 times with a monochromatic source and by up to 1.8 times with a broadband (30 nm) source, compared to a flat-type reference QD film. We will keep you updated and appreciate your continued support.

Title: Analysis Results of a Multilayer Metamaterial Absorber Ranged from Visible to Middle Infrared Using Finite-Difference Time-Domain method (FDTD) and COMSOL
Authors: Shu-Han Liao1, Xin-Yu Lin2, Cheng-Fu Yang 2,3*, and Tung-Lung Wu4,*
Affiliation: 1 Department of Electrical and Computer Engineering, Tamkang University, New Taipei City 251, Taiwan; [email protected] 2 Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan; [email protected] (X.Y. Lin); [email protected] (C.F. Yang) 3 Department of Aeronautical Engineering, Chaoyang University of Technology, Taichung 413, Taiwan 4 Department of Electrical Engineering, Lunghwa University of Science and Technology, Taoyuan 333, Taiwan; [email protected] * Correspondence: [email protected] (C.F. Yang); [email protected] (T.L. Wu)
Abstract: First, we will compare the absorption characteristics obtained from our FDTD simulations with the absorption rates derived from COMSOL. Due to the differing computational methods used by these software packages, the initial absorption rates calculated based on the parameters from the literature may not align. To address this, we will adjust the thicknesses of each material layer in COMSOL to identify the optimal parameters for our design. This iterative process will enable us to refine our model systematically. Finally, we will compare the optimized absorption rates with those from the original COMSOL parameters, facilitating a deeper discussion on the effectiveness of each method and the implications for future designs. This comprehensive analysis will enhance our understanding of the absorption mechanisms and potentially lead to improved absorber performance.