Hexagonal Prism Blue Laser Diode with Low Threshold Power using Whispering Gallery Mode (WGM) Resonances

Author

Kim, Sangho ; Sands, Timothy D.

Author_Institution

Purdue University, West Lafayette

fYear

2007

fDate

18-20 June 2007

Firstpage

101

Lastpage

102

Abstract

In this work, electrically pumped room temperature emitters using hexagonal prism cavities have been fabricated. The hexagonal prism shape provides a route to atomically smooth facets through selective growth or post etching annealing treatments, exploiting the natural crystal form of the wurtzite-structured nitride heterostructures. The lasing mode of the hexagonal prism diodes was verified as WGM by using focused ion beam (FIB) to notch one of the hexagon facets. The threshold current density and forward voltage of the hexagonal prism laser diode were 7kA/cm2 and 9V, respectively. WGM and TIR are believed to be the main mechanisms for reduced reflection losses and increased overall resonance efficiency.

Keywords

annealing; current density; etching; focused ion beam technology; laser beams; laser modes; light emitting diodes; optical fabrication; optical prisms; semiconductor lasers; whispering gallery modes; FIB; electrically pumped room temperature emitters; focused ion beam; hexagonal prism blue laser diode; hexagonal prism cavities; lasing mode; low threshold power; natural crystal; planar LED; post etching annealing treatment; reflection losses; threshold current density; voltage 9 V; whispering gallery mode resonances; wurtzite-structured nitride heterostructures; Annealing; Atomic beams; Diode lasers; Etching; Ion beams; Resonance; Shape; Temperature; Threshold current; Whispering gallery modes;

fLanguage

English

Publisher

ieee

Conference_Titel

Device Research Conference, 2007 65th Annual

Conference_Location

Notre Dame, IN

ISSN

1548-3770

Print_ISBN

978-1-4244-1101-6

Electronic_ISBN

1548-3770

Type

conf

DOI

10.1109/DRC.2007.4373669

Filename

4373669