Title :
Spatiotemporal coherence of GaN excitons excited by an optical vortex with multiple orbital angular momentum
Author :
Shigematsu, Kyohhei ; Yamane, Keisaku ; Morita, Ryuji ; Toda, Yuichiro
Author_Institution :
Dept. of Appl. Phys., Hokkaido Univ., Sapporo, Japan
Abstract :
The spatiotemporal coherence of excitons is investigated by degenerate four-wavemixing using optical vortices with multiple orbital angular momentum (OAM). The OAM-resolved signal indicates that the topological phase with large OAM is robust against spatial decoherence.
Keywords :
III-V semiconductors; angular momentum; excitons; gallium compounds; light coherence; multiwave mixing; optical vortices; spatiotemporal phenomena; wide band gap semiconductors; GaN; OAM-resolved signal; excitons; four wave mixing; multiple orbital angular momentum; optical vortex; spatiotemporal coherence; topological phase; Coherence; Excitons; Laser beams; Optical vortices; Probes; Signal resolution; Spatial resolution;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
