OMC Poster Session

[OMCp-11] Broad-Spectral-Bandwidth, High-Absorbance Germanium Infrared Photodetector at the 1550 nm Wavelength by the Subwavelength Phase-Tunable Grating

*Ching-Yu Hsu¹, Zingway Pei², Jia-Ming Liu³ (1. National Yang Ming Chiao Tung University, 2. National Chung Hsing University, 3. University of California, Los Angles)

A novel Ge infrared photodetector with a subwavelength phase-tunable grating and resonant-cavity-enhanced structure achieves over 60% absorbance (1428 nm to 1567 nm). At 1550 nm, absorbance reaches 69.86% with a 390-nm thin Ge layer.