Tunable optical nonlinearity of Au-TiO2 nanocomposites

被引：4

作者：

Kumar, Avesh ^{[1
,2
]}

Singh, R. P. ^{[2
]}

Mohanty, T. ^{[3
]}

Taneja, Ajay ^{[1
]}

机构：

[1] Dr BR Ambedkar Univ, Dept Chem, Agra 282002, Uttar Pradesh, India

[2] Phys Res Lab, Ahmadabad 380009, Gujarat, India

[3] Jawaharlal Nehru Univ, Sch Phys Sci, New Delhi 110067, India

来源：

PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS | 2019年 / 33卷 / 1-9期

关键词：

Nanocomposites; Surface plasmon resonance; Work function; Z-scan technique; Optical nonlinearity; SURFACE-PLASMON RESONANCE; GOLD NANOPARTICLES; Z-SCAN; AG NANOPARTICLES; ENHANCEMENT; ELECTRON; TIO2; ANATASE; RUTILE; AU;

D O I：

10.1016/j.photonics.2018.11.001

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The present work is focused on the correlation studies of Fermi energy level and optical nonlinearity of Au-TiO2 nanocomposites. The Fermi energy and optical nonlinearity arc found to be nearly proportionally related with respect to concentration of Au. The observed shift in Fermi level with increasing concentration of Au is due to charge transfer between TiO2 and Au in the presence of ultraviolet light irradiation during the formation of Au-TiO2 nanocomposites. The estimated third order optical nonlinearity was found to increase from 3.80 x 10(-6) to 9.69 x 10(-6) esu with increase in Au concentrations from 0 to 1.0 x 10(-2) M. This observed increment in nonlinearity is due to the enhancement of local electric field created by excitation of surface plasmon resonance that affects the Fermi energy level or work function.

引用

页码：1 / 9

页数：9

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