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ITO-Induced Nonlinear Optical Response Enhancement of Titanium Nitride Thin Films

Authors :
Peng Lu
Tingzhen Yan
Jialei Huang
Tian Xing
Hao Liu
Zhaoxia Han
Xueke Xu
Chunxian Tao
Source :
Nanomaterials, Vol 14, Iss 12, p 1040 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

A series of TiN/ITO composite films with various thickness of ITO buffer layer were fabricated in this study. The enhancement of optical properties was realized in the composite thin films. The absorption spectra showed that absorption intensity in the near-infrared region was obviously enhanced with the increase of ITO thickness due to the coupling of surface plasma between TiN and ITO. The epsilon-near-zero wavelength of this composite can be tuned from 935 nm to 1895 nm by varying the thickness of ITO thin films. The nonlinear optical property investigated by Z-scan technique showed that the nonlinear absorption coefficient (β = 3.03 × 10−4 cm/W) for the composite was about 14.02 times greater than that of single-layer TiN films. The theoretical calculations performed by finite difference time domain were in good agreement with those of the experiments.

Details

Language :
English
ISSN :
20794991
Volume :
14
Issue :
12
Database :
Directory of Open Access Journals
Journal :
Nanomaterials
Publication Type :
Academic Journal
Accession number :
edsdoj.8d9d5c3d1cf34c6395d6734caea0cb87
Document Type :
article
Full Text :
https://doi.org/10.3390/nano14121040