Tunable Nonlinear Optical Response of ITO Films with Au@Ag Bimetallic Nanoparticles

Tingzhen Yan; Ruijin Hong; Jiqing Lian; Chunxian Tao; Hui Lin; Qi Wang; Zhaoxia Han; Dawei Zhang

doi:10.3390/nano13101631

Nanomaterials (May 2023)

Tunable Nonlinear Optical Response of ITO Films with Au@Ag Bimetallic Nanoparticles

Tingzhen Yan,
Ruijin Hong,
Jiqing Lian,
Chunxian Tao,
Hui Lin,
Qi Wang,
Zhaoxia Han,
Dawei Zhang

Affiliations

Tingzhen Yan: Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
Ruijin Hong: Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
Jiqing Lian: Department of Printing and Pack Aging Engineering, Shanghai Publishing and Printing College, No. 100 Shuifeng Road, Shanghai 200093, China
Chunxian Tao: Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
Hui Lin: Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
Qi Wang: Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
Zhaoxia Han: Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
Dawei Zhang: Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China

DOI: https://doi.org/10.3390/nano13101631
Journal volume & issue: Vol. 13, no. 10
p. 1631

Abstract

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The nonlinear optical (NLO) response of indium tin oxide films covered with Au@Ag colloid layer was characterized by a femtosecond single-beam open aperture (OA) Z-scan technique in this study. As the Au@Ag thickness increased, the transition from saturated absorption (SA) to reverse saturated absorption (RSA) was found in these ITO matrix composites. The nonlinear absorption coefficient for these composite materials can be regulated from −6.85 × 10−7 m/W to 26.06 × 10−7 m/W. In addition, this work also characterized the structure, morphology, and other optical properties of the specimen, and the finite-difference time-domain (FDTD) results were consistent with the experimental results. The NLO response of the ITO/Au@Ag composites can be attributed to the phase properties, synergistic competition effect, strong interaction based on the epsilon-near-zero (ENZ) mode, and localized surface plasmon resonance (LSPR) between the indium tin oxide films and Au@Ag.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

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