Optical phonons assisted infrared absorption in VO2 based bolometer

被引：35

作者：

Chen, Changhong ^{[1
]}

Zhou, Zhiping

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

[2] Georgia Inst Technol, Sch ECE, Atlanta, GA 30332 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 01期

关键词：

D O I：

10.1063/1.2753746

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Optical phonons assisted infrared absorption in VO2 based bolometer is demonstrated to be free, low, or over damping oscillation over different spectral ranges depending on the passivation thickness. In particular, it will become saturated due to the over damping oscillation in the spectral range corresponding to the absorption bands from strong phonon vibrations. The device reaches a peak absorbance of 99.9% at wavelength of 9.1 mu m and shows a broadband absorption, independent of metal-insulator transition and radiation incident angle up to 30 degrees in the long wavelength (8-14 mu m) infrared region. (c) 2007 American Institute of Physics.

引用

页数：3

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