Nonlinear optical properties of coaxial InGaN/GaN multiple quantum well (MQWs) submicron hetero-structures were investigated using a tunable femtosecond laser at room temperature. Co-axial InGaN/GaN MQW hetero-structures were fabricated by depositing InGaN/GaN layers on the side walls of GaN submicron tubes on top of GaN micro-pyramids. Excitation and signal collection from a single micro-structure was achieved using multi-photon spectroscopy. Two photon excited photoluminescence (TPEL) was observed at around 390 nm independent of excitation wavelength. In addition to TPEL, observation of second harmonic signal of the excitation laser is also presented.

Date Published: 27 February 2015
PDF: 6 pages
Proc. SPIE 9347, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV, 93470V (27 February 2015); doi: 10.1117/12.2079855

Published in SPIE Proceedings Vol. 9347:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV
Konstantin L. Vodopyanov, Editor(s)