Enhanced third-order optical nonlinearity and photon luminescence of Sn 2+ in gold nanoparticles embedded chalcogenide g
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Enhanced third-order optical nonlinearity and photon luminescence of Sn2+ in gold nanoparticles embedded chalcogenide glasses Jiao Zhang1,2, Tingting Sun1,2, Chen Zhang1,2, Yinwei Yang1, Changgui Lin1,2, Shixun Dai1,2, Xianghua Zhang3, Wei Ji4, and Feifei Chen1,2,* 1
Laboratory of Infrared Materials and Devices, The Research Institute of Advanced Technologies, Ningbo University, Ningbo 315211, China 2 Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo University, Ningbo 315211, China 3 Laboratory of Glasses and Ceramics, UMR 6226 CNRS, University of Rennes 1, 135042 Rennes Cedex, France 4 Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
Received: 4 March 2020
ABSTRACT
Accepted: 17 August 2020
In this work, we successfully prepared gold nanoparticles (AuNPs) within a germanium–tin–sulfur (Ge–Sn–S, GSS) chalcogenide glass (ChG). The formation of AuNPs in the GSS ChG relies on the reduction capacity of Sn2? ions, which we found their existence in the glass matrix by the characteristic emissions at nearly 450 nm. The AuNPs exhibit strong optical activity which caused a significant enhancement of third-order optical nonlinearity of the GSS ChG as well as photon luminescence of the Sn2? ions. In addition, optical properties the AuNPs-embedded GSS ChGs can be modified by further gold doping and onestep heat-treatment process.
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Introduction Chalcogenide glasses (ChGs) possess wide infrared (IR) transmission range (up to 25 lm) and large thirdorder optical nonlinear susceptibility (TONL, v(3) magnitude of 2–3 orders higher than that of silica glass). The combination of these two unique properties along with modifiable composition, low thermooptic coefficient, and high chemical stability makes
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https://doi.org/10.1007/s10853-020-05124-1
ChGs a perfect candidate material for applications in current IR and nonlinear photonics [1–7]. One of the fundamental research topics in the field of ChG materials is to optimize their TONL performance being available for various devices. The latest research with respect to this topic [8, 9] shows a growing interest in the acquirement of ultra-large TONL by the introduction of nano-structures to ChGs, based on taking advantage of size confinement or plasmonic resonant effects from the nano-structures. On the other hand, it is well known that gold
J Mater Sci
nanoparticles (AuNPs) with surface plasmon resonance at a classic wavelength of 532 nm could enhance v(3) of pure glasses by several orders, and we can find abundant studies with respect to TONL properties of AuNPs-embedded oxide glasses [10–14]. However, AuNPs-embedded ChGs were barely studied, probably because the smaller electronegativity of chalcogenide elements as compared to oxygen makes the noble metal relatively hard to be reduced. Our recent work [15] had found tha
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