Effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilms

Photoacoustic and thermoacoustic detection methods, including picosecond ultrasonic laser sonar based on metallic thin films, are widely used in industrial applications for their noninvasiveness. Herein, we present our findings on the phase advance effect of laser-induced picosecond ultrasonic signa...

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Main Authors: Ting-Shan Lee, Chi-Kuang Sun
Format: Article
Language:English
Published: Elsevier 2023-06-01
Series:Photoacoustics
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2213597923000629
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author Ting-Shan Lee
Chi-Kuang Sun
author_facet Ting-Shan Lee
Chi-Kuang Sun
author_sort Ting-Shan Lee
collection DOAJ
description Photoacoustic and thermoacoustic detection methods, including picosecond ultrasonic laser sonar based on metallic thin films, are widely used in industrial applications for their noninvasiveness. Herein, we present our findings on the phase advance effect of laser-induced picosecond ultrasonic signals in surface plasmon detection in Al nanofilms. Al has been extensively studied as a promising surface plasmon material in the ultraviolet region. Reflection time-resolved spectroscopy was integrated with a Kretschmann configuration to study the optical detection mechanisms with and without meeting the surface plasmon phase-matching condition. Through a comparison of the phase changes in picosecond ultrasonic pulses at different optical detection angles, we attributed the observed phase delay modification to the displacement of the detection region under the surface plasmon phase-matching condition.
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spelling doaj.art-46ca70c9e349414a82ff853cda2d804b2023-06-19T04:28:06ZengElsevierPhotoacoustics2213-59792023-06-0131100509Effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilmsTing-Shan Lee0Chi-Kuang Sun1Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, TaiwanDepartment of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan; Research Center for Applied Sciences, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei 11529, Taiwan; Corresponding author at: Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan.Photoacoustic and thermoacoustic detection methods, including picosecond ultrasonic laser sonar based on metallic thin films, are widely used in industrial applications for their noninvasiveness. Herein, we present our findings on the phase advance effect of laser-induced picosecond ultrasonic signals in surface plasmon detection in Al nanofilms. Al has been extensively studied as a promising surface plasmon material in the ultraviolet region. Reflection time-resolved spectroscopy was integrated with a Kretschmann configuration to study the optical detection mechanisms with and without meeting the surface plasmon phase-matching condition. Through a comparison of the phase changes in picosecond ultrasonic pulses at different optical detection angles, we attributed the observed phase delay modification to the displacement of the detection region under the surface plasmon phase-matching condition.http://www.sciencedirect.com/science/article/pii/S2213597923000629Aluminum nanofilmPicosecond ultrasonicsSurface plasmon
spellingShingle Ting-Shan Lee
Chi-Kuang Sun
Effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilms
Photoacoustics
Aluminum nanofilm
Picosecond ultrasonics
Surface plasmon
title Effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilms
title_full Effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilms
title_fullStr Effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilms
title_full_unstemmed Effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilms
title_short Effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilms
title_sort effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilms
topic Aluminum nanofilm
Picosecond ultrasonics
Surface plasmon
url http://www.sciencedirect.com/science/article/pii/S2213597923000629
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AT chikuangsun effectofsurfaceplasmononopticaldetectionofpicosecondultrasonicpulsesgeneratedinaluminumnanofilms