Special Issue "Acousto-Optical Spectral Technologies"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Optics and Photonics".

Deadline for manuscript submissions: 20 May 2022.

Special Issue Editors

Dr. Alexander S. Machikhin
E-Mail Website
Guest Editor
Laboratoty of Acousto-Optic Spectroscopy, Scientific and Technological Center of Unique Insrumentation, Russian Academy of Sciences
Interests: acousto-optics; spectral imaging; image processing; digital holography
Prof. Vitold Pozhar
E-Mail Website
Guest Editor
Laboratoty of Acousto-optic Spectroscopy, Scientific and Technological Center of Unique Insrumentation, Russian Academy of Sciences
Interests: acousto-optics; spectroscopy; spectral imaging; acousto-optical materials

Special Issue Information

Dear Colleagues,

It is our pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome. Acousto-optic technologies have increasingly attracted attention of scientists and engineers. Acousto-optic interactions have become the flexible basis of compact and robust devices for the analysis of the intensity, spectrum, polarization, and other properties of light. In this Special Issue, modern trends of acousto-optical spectral technologies, including the fundamentals and optimization of existing techniques, are highlighted and discussed.

This Special Issue will deal with research including but not restricted to the following:

  • Acousto-optic materials and structures for UV, visible, IR, and THz ranges;
  • Theoretical and experimental studies of light diffraction by ultrasonic waves;
  • Acousto-optic and photoacoustic spectroscopy;
  • Spectral imaging and tomography;
  • Multispectral and hyperspectral acousto-optic imagers;
  • Acousto-optic image and signal processing;
  • Acousto-optic interference techniques;
  • Novel applications in remote sensing, biomedicine, and industry.

This Special Issue also provides a forum for reports on technical developments that allow the spectral analysis of various objects. The goal of this Issue is to give readers an overview of the hot topics and the state of the art regarding the applications of acousto-optic spectroscopy techniques.

Dr. Alexander S. Machikhin
Prof. Vitold Pozhar
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 papers will be 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. Materials is an international peer-reviewed open access semimonthly 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 2000 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

  • Acousto-optics
  • Acousto-optical materials
  • Bragg diffraction
  • Acousto-optic spectroscopy
  • Spectral imaging
  • Acousto-optic devices
  • Acousto-optic image processing
  • Microscopy and tomography

Published Papers (5 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Jump to: Review

Article
Optically Transparent and Highly Conductive Electrodes for Acousto-Optical Devices
Materials 2021, 14(23), 7178; https://doi.org/10.3390/ma14237178 - 25 Nov 2021
Viewed by 143
Abstract
The study was devoted to the creation of transparent electrodes based on highly conductive mesh structures. The analysis and reasonable choice of technological approaches to the production of such materials with a high Q factor (the ratio of transparency and electrical conductivity) were [...] Read more.
The study was devoted to the creation of transparent electrodes based on highly conductive mesh structures. The analysis and reasonable choice of technological approaches to the production of such materials with a high Q factor (the ratio of transparency and electrical conductivity) were carried out. The developed manufacturing technology consists of the formation of grooves in a transparent substrate by photolithography methods, followed by reactive ion plasma etching and their metallization by chemical deposition using the silver mirror reaction. Experimental samples of a transparent electrode fabricated using this technology have a sheet resistance of about 0.1 Ω/sq with a light transmittance in the visible wavelength range of more than 60%. Full article
(This article belongs to the Special Issue Acousto-Optical Spectral Technologies)
Show Figures

Figure 1

Article
Temperature Effects in an Acousto-Optic Modulator of Terahertz Radiation Based on Liquefied SF6 Gas
Materials 2021, 14(19), 5519; https://doi.org/10.3390/ma14195519 - 23 Sep 2021
Viewed by 585
Abstract
The acousto-optic (AO) diffraction of terahertz (THz) radiation in liquefied sulfur hexafluoride (SF6) was investigated in various temperature regimes. It was found that with the increase in the temperature from +10 to +23 °C, the efficiency of the AO diffraction [...] Read more.
The acousto-optic (AO) diffraction of terahertz (THz) radiation in liquefied sulfur hexafluoride (SF6) was investigated in various temperature regimes. It was found that with the increase in the temperature from +10 to +23 °C, the efficiency of the AO diffraction became one order higher at the same amplitude of the driving electrical signal. At the same time, the efficiency of the AO diffraction per 1 W of the sound power as well as the angular bandwidth of the efficient AO interaction were temperature independent within the measurement error. Increase of the resonant sound frequency with decreasing temperature and strong narrowing of the sound frequency bandwidth of the efficient AO interaction were detected. Full article
(This article belongs to the Special Issue Acousto-Optical Spectral Technologies)
Show Figures

Figure 1

Article
Spectral Imaging Experiments with Various Optical Schemes Based on the Same AOTF
Materials 2021, 14(11), 2984; https://doi.org/10.3390/ma14112984 - 31 May 2021
Viewed by 739
Abstract
Spectral image filtration by means of acousto-optical tunable filters (AOTFs) has multiple applications. For its implementation, a few different optical schemes are in use. They differ in image quality, number of coupling components, dimensions and alignment complexity. To choose the optical system of [...] Read more.
Spectral image filtration by means of acousto-optical tunable filters (AOTFs) has multiple applications. For its implementation, a few different optical schemes are in use. They differ in image quality, number of coupling components, dimensions and alignment complexity. To choose the optical system of AOTF-based spectral imager properly, many factors have to be considered. Though various schemes of acousto-optic (AO) filtration have been tested and discussed, their comparative analysis has not been reported up to now. In this study, we assembled the four most popular schemes (confocal, collimating, tandem and double-path) using the same AO cells and experimentally compared their main features. Depending on the application, each scheme may be the basis of compact cost-effective spectral imaging devices. Full article
(This article belongs to the Special Issue Acousto-Optical Spectral Technologies)
Show Figures

Figure 1

Article
Acousto-Optic Cells with Phased-Array Transducers and Their Application in Systems of Optical Information Processing
Materials 2021, 14(2), 451; https://doi.org/10.3390/ma14020451 - 18 Jan 2021
Cited by 3 | Viewed by 701
Abstract
This paper presents the results of theoretical and experimental studies of anisotropic acousto-optic interaction in a spatially periodical acoustic field created by a phased-array transducer with antiphase excitation of adjacent sections. In this case, contrary to the nonsectioned transducer, light diffraction is absent [...] Read more.
This paper presents the results of theoretical and experimental studies of anisotropic acousto-optic interaction in a spatially periodical acoustic field created by a phased-array transducer with antiphase excitation of adjacent sections. In this case, contrary to the nonsectioned transducer, light diffraction is absent when the optical beam falls on the phased-array cell at the Bragg angle. However, the diffraction takes place at some other angles (called “optimal” here), which are situated on the opposite sides to the Bragg angle. Our calculations show that the diffraction efficiency can reach 100% at these optimal angles in spite of a noticeable acousto-optic phase mismatch. This kind of acousto-optic interaction possesses a number of interesting regularities which can be useful for designing acousto-optic devices of a new type. Our experiments were performed with a paratellurite (TeO2) cell in which a shear acoustic mode was excited at a 9 angle to the crystal plane (001). The piezoelectric transducer had to nine antiphase sections. The efficiency of electric to acoustic power conversion was 99% at the maximum frequency response, and the ultrasound excitation band extended from 70 to 160 MHz. The experiments have confirmed basic results of the theoretical analysis. Full article
(This article belongs to the Special Issue Acousto-Optical Spectral Technologies)
Show Figures

Figure 1

Review

Jump to: Research

Review
Applications of AOTF Spectrometers in In Situ Lunar Measurements
Materials 2021, 14(13), 3454; https://doi.org/10.3390/ma14133454 - 22 Jun 2021
Cited by 2 | Viewed by 509
Abstract
Spectrometers based on acousto-optic tunable filters (AOTFs) have several advantages, such as stable temperature adaptability, no moving parts, and wavelength selection through electrical modulation, compared with the traditional grating and Fourier transform spectrometers. Therefore, AOTF spectrometers can realize stable in situ measurement on [...] Read more.
Spectrometers based on acousto-optic tunable filters (AOTFs) have several advantages, such as stable temperature adaptability, no moving parts, and wavelength selection through electrical modulation, compared with the traditional grating and Fourier transform spectrometers. Therefore, AOTF spectrometers can realize stable in situ measurement on the lunar surface under wide temperature ranges and low light environments. AOTF imaging spectrometers were first employed for in situ measurement of the lunar surface in the Chinese Chang’e project. The visible and near-infrared imaging spectrometer and the lunar mineralogical spectrometer have been successfully deployed on board the Chang’e-3/4 and Chang’e-5 missions. In this review, we investigate the performance indicators, structural design, selected AOTF performance parameters, data acquisition of the three lunar in situ spectral instruments used in the Chang’e missions. In addition, we also show the scientific achievement of lunar technology based on in situ spectral data. Full article
(This article belongs to the Special Issue Acousto-Optical Spectral Technologies)
Show Figures

Figure 1

Back to TopTop