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A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optoelectronics and Optical Materials".

Deadline for manuscript submissions: 30 May 2023 | Viewed by 5075

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Special Issue Editors

Prof. Dr. Qiuqiang Zhan

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Guest Editor

South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Interests: super-resolution; photon upconversion; biophotonics; optical imaging

Dr. Chaohao Chen

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Guest Editor

School of Electrical and Data Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney 2007, Australia
Interests: nanophotonics; on-chip imaging; super-resolution; nonlinear; imaging process
Special Issues, Collections and Topics in MDPI journals

Dr. Baolei Liu

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Guest Editor

School of Physics, Beihang University, Beijing, China
Interests: upconversion nanoparticles; super-resolution imaging; computational imaging; optical systems

Dr. Haichun Liu

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Guest Editor

Department of Applied Physics, KTH Royal Institute of Technology, Stockholm, Sweden
Interests: upconversion nanoparticles; nanophotonics; single molecule spectroscopy; super-resolution imaging

Special Issue Information

Dear Colleagues,

Photonic materials and technologies serve crucial roles in information processing, chemical sensors, biological imaging, light-emitting devices, and optical memory, among other essential applications. They cover a wide range of materials and material technologies, such as wide band-gap semiconductors, materials for magnetic data storage, diamond materials for extra-bright display screens, nanomaterials for next-generation displays, semiconductor laser materials, and so on. The development of photonic materials also benefits functional photonic devices and optical systems and leads to a wide range of applications.

This Special Issue will collect both reviews and original research papers that explore advances in photonic materials and photonic/optical systems. Topics of interest include but are not limited to the following areas:

Photonic materials; nonlinear optics; photonic devices; photonic sensors; nanophotonics; biophotonics; upconversion materials; quantum dots; nano-diamond; fluorescence microscopy; super-resolution microscopy; computational imaging; single-pixel imaging; plasmonic; polarization imaging; near-infrared imaging; unconventional imaging; lifetime, on-chip imaging.

Prof. Dr. Qiuqiang Zhan
Dr. Chaohao Chen
Dr. Baolei Liu
Dr. Haichun Liu
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 1800 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.

Keywords

photonic materials
photonic devices
nanophotonics
biomedical imaging and biophotonics
computational imaging
super-resolution imaging
optical metamaterials and devices
plasmonic
on-chip imaging
information optoelectronics
infrared sensor
optical system

Published Papers (7 papers)

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Research

Open AccessArticle

Analysis of the Emission Features in CdSe/ZnS Quantum Dot-Doped Polymer Fibers

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Photonics 2023, 10(3), 327; https://doi.org/10.3390/photonics10030327 - 18 Mar 2023

Viewed by 383

Abstract

The emission features of Cdse/ZnS quantum dots doped step-index polymer optical fibers are computationally analyzed in this paper. Spontaneous emission and amplified spontaneous emission were calculated by a theoretical model based on the rate equations in terms of time, fiber length, and wavelength. All the calculated parameters are derived from experiments. Through the comparative analysis of the calculated and experimental results of spontaneous emission, we found that the pump power and overlap between the emission and absorption cross-sections may be the two main reasons for the red shift of the output spectra. When the pump power exceeds the threshold of amplified spontaneous emission, the width of the output spectra will rapidly decrease, the output wavelength will fall back toward the maximum emission cross-section, and the final output wavelength will still be affected by the doping concentration and pump power, while amplified spontaneous emission will not be generated when the total number of doped quantum dots is less than 1.27 × 10¹². Full article

(This article belongs to the Special Issue Advances in Photonic Materials and Technologies)

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Open AccessArticle

Thermal Lensing and Laser-Induced Damage in Special Pure Chalcogenide Ge₃₅As₁₀S₅₅ and Ge₂₀As₂₂Se₅₈ Glasses under Quasi-CW Fiber Laser Irradiation at 1908 nm

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Photonics 2023, 10(3), 252; https://doi.org/10.3390/photonics10030252 - 28 Feb 2023

Viewed by 532

Abstract

Special pure chalcogenide glass is the material of choice for many mid-infrared optical fibers and fiber lasers. In this paper, the thermo-optical lensing and laser-induced damage were studied in Ge₃₅As₁₀S₅₅ and Ge₂₀As₂₂Se₅₈ glasses and compared with the well-studied As₂S₃ glass. The thermal Z-scan technique with the quasi-CW Tm-doped fiber laser at 1908 nm was applied to study thermal lensing in chalcogenide glass. The laser-induced damage of various chalcogenide glasses was determined using the one-on-one procedure. The thermal nonlinear refractive index of the Ge₃₅As₁₀S₅₅ and Ge₂₀As₂₂Se₅₈ glasses was found to be lower than that of the As₂S₃ glass. The laser-induced damage threshold of the Ge₂₀As₂₂Se₅₈ glass was determined to be higher than that of the Ge₃₅As₁₀S₅₅ glass. The difference in the thermal damage threshold of the Ge₃₅As₁₀S₅₅ and Ge₂₀As₂₂Se₅₈ glasses and their lower value in comparison with the As₂S₃ glass were explained by a deviation from the stoichiometry of glass compositions and their tendency to crystallize. Full article

(This article belongs to the Special Issue Advances in Photonic Materials and Technologies)

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Open AccessArticle

Polarization-Dependent Absorption and Transmission Metasurfaces for Linearly and Circularly Polarized Light in Terahertz Band

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Photonics 2023, 10(2), 100; https://doi.org/10.3390/photonics10020100 - 17 Jan 2023

Viewed by 607

Abstract

Polarization detection is an important part of many polarization applications such as polarization imaging, wireless communication, and circular dichroism spectroscopy. In this paper, two polarization-dependent terahertz wave absorption and transmission metasurface for linearly and circularly polarized light are proposed and proved by numerical simulations. Polarization filtering and polarization absorption are integrated on a single cell, and the orthogonal polarization component is transmitted and absorbed, respectively. The linearly polarization-dependent transmission and absorption structure can obtain a transmission extinction ratio of 11.5 dB and an absorption extinction ratio of over 270 dB at 3 THz. Moreover, the circularly polarization-dependent structure can obtain a transmission extinction ratio of 8.1 dB and an absorption extinction ratio of 4.66 dB at 2.8 THz. Our design facilitates the acquisition of full Stokes parameters and the high-resolution imaging. Full article

(This article belongs to the Special Issue Advances in Photonic Materials and Technologies)

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Open AccessArticle

Chromatic-Aberration-Corrected Hyperspectral Single-Pixel Imaging

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Photonics 2023, 10(1), 7; https://doi.org/10.3390/photonics10010007 - 22 Dec 2022

Cited by 2 | Viewed by 918

Abstract

With the emerging development of hyperspectral single-pixel imaging (SPI) systems, the trade-off between the simplicity of optical structure and the correction of chromatic aberration is now an essential factor to be considered. To address both issues simultaneously, we propose a chromatic-aberration-corrected hyperspectral single-pixel imaging scheme, which is based on spectral measurement and dispersion correction. Its achromatism feature is evaluated by optical simulations and proof-of-concept experiments. Moreover, to overcome the shortcomings of traditional algorithms, a new adaptive iterative algorithm is employed, which can further optimize image quality. The results demonstrate that both dispersion and noise in our system are significantly reduced. Taking the position coordinate variance as a figure of merit, we have realized an order of magnitude improvement in the lateral chromatic aberration over the spectral range of 400–780 nm compared to that in conventional hyperspectral SPI. Meanwhile, the contrast-to-noise ratio in our system is enhanced on average by 3 dB. To the best of our knowledge, this is the first such demonstration, and the technique presents possibilities for future integrated applications of high spatial/spectral resolution over the entire visible range, and the system has the potential to be scaled down for future integrated applications. Full article

(This article belongs to the Special Issue Advances in Photonic Materials and Technologies)

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Open AccessArticle

Optical Design for Aberration Correction of Ultra-Wide Spectral Range Echelle Spectrometer

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Photonics 2022, 9(11), 841; https://doi.org/10.3390/photonics9110841 - 08 Nov 2022

Viewed by 624

Abstract

The echelle grating spectrometer, with a wide spectral range and high-resolution spectral analysis, is one of the best tools for fine spectral measurement. Nevertheless, it suffers from excessive residual aberrations and a large overall size. In this study, the design and implementation of a novel asymmetric Czerny–Turner ultra-wide spectral range achromatic echelle spectrometer are described. The echelle spectrometer has three channels, and it uses an off-axis parabolic mirror to obtain collimated light without aberrations. Three sets of gratings and dispersive prisms with different coatings are utilized as cross-dispersion elements to acquire two-dimensional images containing spectral information. Suitable detectors are selected according to the requirements of each channel, and three sets of coaxial focusing lenses are designed separately to minimize the aberration. The results of the simulation analysis by ZEMAX indicate that in the entire operating band (200–1100 nm), the root mean square radius of the dispersion spots is ≤ 2.2 μm, all of which are located within the limited range of the size of the detector, thus ensuring that the system’s spectral resolution reaches 0.02 nm at 200 nm, 0.04 nm at 650 nm, and 0.1 nm at 1100 nm. Full article

(This article belongs to the Special Issue Advances in Photonic Materials and Technologies)

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Open AccessArticle

An Optical POCT Device for Colorimetric Detection of Urine Test Strips Based on Raspberry Pi Imaging

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Photonics 2022, 9(10), 784; https://doi.org/10.3390/photonics9100784 - 21 Oct 2022

Viewed by 986

Abstract

Urine examinations are widely applied in hospitals using urine test strip analyzers or other sophisticated professional instruments. However, such methods are inconvenient health monitoring of patients at home. Herein, we construct an optical device for point-of-care testing (POCT) for urine analysis at home or on the spot. A black box and color calibration curve are established to eliminate the influence of ambient light with an independent internal lighting system included in the device. A Raspberry Pi with a CSI camera is programmed to automatically collect the strip images and identify the HSV values of the image with an image processing algorithm. During this process, these corrected colors are converted to concentration values by preloaded standard curves. Under optimal conditions, the proposed POCT device can quantitatively and automatically detect glucose within 1 min, with linear detection ranging from 2 mM to 60 mM and a detection limit of 1.16 mM. In addition, the device demonstrates satisfactory accuracy and quantitative analysis of ketone bodies, glucose, protein, occult blood, pH, and leukocytes in human urine samples with high-resolution concentrations, achieving results similar to those obtained with hospital instruments. The proposed device is portable and user-friendly, providing convenient colorimetric analysis for urine. Furthermore, the proposed device also has considerable potential for the development of in vitro diagnosis methods through combination with other test strips. Full article

(This article belongs to the Special Issue Advances in Photonic Materials and Technologies)

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Open AccessCommunication

Sampling Parallel SOA-MZIs Configuration for All-Optical Simultaneous Frequency Down-Conversion

Hassan Termos

and

Ali Mansour

Photonics 2022, 9(10), 745; https://doi.org/10.3390/photonics9100745 - 09 Oct 2022

Cited by 1 | Viewed by 561

Abstract

In this paper, we expound a modulation concept to contrive simultaneous frequency down-conversion based on a three parallel Semiconductor Optical Amplifier Mach-Zehnder Interferometers (SOA-MZIs) link by using a band pass sampling method in a Virtual Photonics Inc. simulator. Each SOA-MZI is deployed to achieve a down-converted signal, which has ten replicas related to the first ten harmonic ranks of the sampling signal, at the SOA-MZI outer port. Then, the admixture of the three down-converted signals yields a sampled signal, which is called a simultaneous down-converted signal that contains thirty different replicas. The positive down-conversion gains with top values are reached with the sampling parallel SOA-MZIs link. Moreover, we evaluated the quality of the parallel SOA-MZIs transmission system over orthogonal frequency division multiplexing (OFDM) complex modulated signals using the error vector magnitude values as a performance index. The utmost bit rate attained is 2 Gbit/s for OFDM modulations. Full article

(This article belongs to the Special Issue Advances in Photonic Materials and Technologies)

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