Translator Disclaimer
24 August 2009 Refractive index controllable coatings for optical detectors
Author Affiliations +
Proceedings Volume 7381, International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors; 73812C (2009) https://doi.org/10.1117/12.833909
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China
Abstract
SiO2 and SiO2-TiO2 composite nanoporous coating was successfully prepared via sol-gel method in this paper. By the control of the different porosity of SiO2 coating and content of TiO2 in the mixture, the refractive index of the coatings can be adjusted from 1.17 up to 2.20 continuously, which can be well matched with most of the optic materials used in versatile detectors. Meanwhile, the thickness of the crack free SiO2 and SiO2-TiO2 nano-composite coatings can be easily controlled by employing different experimental parameters. As a typical example, a coating with refractive index of 1.82 was prepared for a GaAs based IR detectors. In 2.5 - 6.0μm waveband, the maximum transmittance of GaAs substrate is increased from 56% for uncoated sample to 94% for coated sample, which agrees with the theoretical results quite well.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jun Shen, Sheng-zhao Wang, Xiao-dong Wang, Yuan Liu, and Xiao-guang Li "Refractive index controllable coatings for optical detectors", Proc. SPIE 7381, International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, 73812C (24 August 2009); https://doi.org/10.1117/12.833909
PROCEEDINGS
8 PAGES


SHARE
Advertisement
Advertisement
Back to Top