High-efficiency broadband second harmonic generation in single hexagonal GaAs nanowire.

ABSTRACT: In this paper, we investigate second harmonic generation in a single hexagonal GaAs nanowire. An excellent frequency converter based on this nanowire excited using a femtosecond laser is demonstrated to operate over a range from 730 nm to 1960 nm, which is wider than previously reported ranges for nanowires in the literature. The converter always operates with a high conversion efficiency of ~10-5 W-1 which is ~103 times higher than that obtained from the surface of bulk GaAs. This nanoscale nolinear optical converter that simultaneously owns high efficiency and broad bandwidth may open a new way for application in imaging, bio-sensing and on-chip all-optical signal processing operations.

SUBMITTER: Wang J 

PROVIDER: S-EPMC5438389 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature