[H-1] Characterization I: Low Dimensional Devices and Materials

[H-1-01] Generation of Hollow Beam from GaAs/InGaAs/GaAs Core-multishell Nanowire Cavity

〇Taiga Kunimoto^1,2, Shinjiro Hara^1,2, Junichi Motohisa^1,2 (1. Graduate School of Info. Sci. and Tech., Hokkaido Univ. (Japan), 2. Res. Center for Integrated Quantum Electronics (RCIQE) (Japan))

Presentation style: On-site (in-person)

https://doi.org/10.7567/SSDM.2022.H-1-01

We characterized the beam profiles and polarization states in low-temperature photoluminescence (PL) from a GaAs/InGaAs/GaAs core-multishell nanowire (NW) under CW and pulsed excitations. In the beam profile observation under pulsed excitation, we observed a doughnut-shaped intensity distribution. The beam was also shown to exhibit an axisymmetric distribution in the polarization. These observations indicate that vector beams are generated from the NW. Observed polarization do not correspond to low-order modes of vector beams, suggesting the presence of complicated polarized states reflecting the cavity modes in NWs.