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Open Access Article

Optics and Photonics. 2025; 1: (1) ; 1-12 ; DOI: 10.12208/j.op.20250001.

Optical constants of nanofilms for spectrally selective windows
光谱选择性窗口纳米薄膜的光学常数

作者: Winston T. Ireeta1, Edward Bwayo1,2 *, Daniel Mukiibi1, Denis Okello1, Willy Okullo1, Robert Lugolole1

1 Department of Physics, School of Physical Sciences, College of Natural Sciences, Makerere University, Kampala, Uganda;
2 Department of Physics, Faculty of Science, Muni University, Arua, Uganda

*通讯作者: Edward Bwayo,单位: Department of Physics, School of Physical Sciences, College of Natural Sciences, Makerere University, Kampala, Uganda; Department of Physics, Faculty of Science, Muni University, Arua, Uganda;

发布时间: 2025-08-15 总浏览量: 49

摘要

本工作对沉积角度对光学选择窗口光学常数的影响进行了光谱分析。将 ZnS/Ag 纳米结构涂层沉积在 0 o至 60 o的玻璃基板上。测量的透射率随着可见光区银纳米薄膜沉积角度的增加而增加,但随着红外区银沉积量的增加而降低。透射率随着可见光区硫化锌沉积角度的增加而降低。尽管如此,它还是随着红外区硫化锌沉积角度的增加而增加。反射率随着可见光区银纳米颗粒沉积角度的增加而降低,但随着硫化锌沉积角度的增加而降低。有效折射率从可见光谱中的 3.25 增加到红外光谱中的 6.2。可见光波长下的有效折射率值较低意味着纳米薄膜对可见光是透明的。消光系数从波长400nm处的平均0.2向红外光谱带方向增加。ZnS沉积量的增加对能带隙的影响不显著。然而,银沉积角度的增加使纳米薄膜的能带从3.52 eV增加到3.99 eV。

关键词: 沉积角度;透射率;反射率;折射率;消光系数;能带隙

Abstract

In this work, a spectral analysis of the effect of deposition angle on the optical constants for optically selective windows was carried out. The coatings of ZnS/Ag nanostructures were deposited on glass substrates from 0o to 60o. The measured transmittance increased with an increase in the deposition angle of silver nanofilms in the visible region but decreased with an increase in the deposition of silver in the infrared region. The transmittance decreased with an increase in the deposition angle of zinc sulfide in the visible region. Still, it increased with an increase in the deposition angle of zinc sulfide in the infrared region. The reflectance decreased with an increase in the deposition angle of silver nanoparticles in the visible region but decreased with an increase in the deposition angle of zinc sulfide. The effective refractive index increased from 3.25 in the visible spectrum to 6.2 in the infrared spectrum. The low values of the effective refractive index at visible wavelengths imply that the nanofilms were transparent to visible light. The extinction coefficient increased from an average of 0.2 at a wavelength of 400nm toward the infrared spectral band. The increase in deposition of ZnS did not significantly affect the energy band gap. However, the increase in the deposition angle of silver increased the energy band of the nanofilms from 3.52 to 3.99 eV.

Key words: Deposition angle; Transmittance; Reflectance; Refractive index; Extinction coefficient; Energy band gap

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引用本文

WinstonT.Ireeta, EdwardBwayo, DanielMukiibi, DenisOkello, WillyOkullo, RobertLugolole, 光谱选择性窗口纳米薄膜的光学常数[J]. 光学与光子学, 2025; 1: (1) : 1-12.