Accession Number:

ADA522107

Title:

Black Silicon Germanium (SiGe) for Extended Wavelength Near Infrared Electro-optical Applications

Descriptive Note:

Final rept.

Corporate Author:

ARMY RESEARCH LAB ADELPHI MD

Report Date:

2010-05-01

Pagination or Media Count:

22.0

Abstract:

We have investigated for the first time the reflectivity and absorbance of black silicon-germanium Si1-xGex. Black Si1-xGex was produced by metal enhanced chemical etching using nanometer-scale gold particles as catalyst and HFH2O2CH3COOH etchant. The etched surface was black, textured, and showed strong suppression of reflectivity and enhancement of absorption in the near-infrared region. These properties are consistent with Si1-xGex becoming highly micro-structured due to metal catalysis and wet etching. The lowering of reflection and enhancement of absorption in Si1-xGex is an important milestone towards practical, extended wavelength 2 micrometers electro-optical applications.

Subject Categories:

  • Inorganic Chemistry
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE