Finite Difference Time Domain Method For Analyses Of Vertical Cavity Surface Emitting Lasers

Ngoc Hai Vu, Doan Mien Vu, Quoc Tien Tran, In-Kag Hwang

The 5th International Workshop on Advanced Materials Science and Nanotechnology (IWAMSN2010) – Hanoi, Vietnam – November 09-12, 2010

Fulltex: NMD-P68_Vu_Ngoc_Hai

Abstract

VERTICAL-CAVITY surface-emitting lasers (VCSELs) are excellent candidates for short-haul optical data communication and sensing applications due to their high-volume manufacture, on-wafer testing, and ease of fabrication in dense 2-D arrays . Standard VCSEL designs normally lead to operation in multiple transverse modes because the transverse dimensions of a VCSEL (typically multiple micrometers) are much larger than the effective cavity length in the longitudinal direction (typically hundreds of nanometers). Recently, several methods have been developed for VCSELs with a single-mode operation and a high optical power, such as the surface relief structure the anti-resonant reflecting optical waveguide structure the wedge shaped holey structure and the photonic crystal waveguide structure. The photonic crystal waveguide structure is also called photonic crystal VCSEL or PC-VCSEL. The three-dimensional finite-difference time-domain method was used to simulate the designed PC-VCSEL, with the etching depth and the ratio of the hole diameter to the lattice constant for the single-fundamental-mode operation. The optimized air hole size and distance between two air hole was calculated by this 3D-FDTD methods

Keywords: VCSELs, 3D-FDTD, Photonic crystal