Time resolved spectroscopy of n-type InAsP films
Abstract
In this study, we employed ultrafast Time Resolved Differential Reflectivity (TRDR) and ultrafast time resolved Magneto-optic Kerr Effect (MOKE) on InAsxP1-x ternary alloy. In recent years, InAsxP1-x ternary alloys have attracted extensive attention due to the immense prospect for various optoelectronic applications including optical telecommunication, broadband photodetectors, mid-IR lasers, and also quantum communication devices. As the switching rates in devices are pushed to higher frequencies in optoelectronic and spintronic devices, it is required to perform comprehensive studies of the carrier and spin relaxation dynamics in semiconductors on a femto-second timescale. Here we report carrier and spin dynamics of n-type InAsxP1-x films in a broad optical region (700 nm and 1000 nm). Also, we observed the generation of coherent oscillations which could be related to photo-induced coherent acoustic phonons. The InAsxP1-x films are 1 . 2 micron thick grown on semi-insulating InP (001) wafers and the carrier concentrations are estimated to be 1 ×1017cm-3 .
Supported by the Air Force Office of Scientific Research award FA9550-17-1-0341 and DURIP funding (FA9550-16-1-0358).- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..MARC39007H