Passivation of InGaAs/GaAs Vertical-Cavity Surface-Emitting Lasers by Amorphous GaAs Deposition

1995 ◽  
Vol 378 ◽  
Author(s):  
Hyo-Hoon Park ◽  
Byueng-Su Yoo ◽  
Min Soo Park ◽  
Jaejin Lee ◽  
Hae Gwon Lee ◽  
...  
Keyword(s):  
Surface Passivation ◽  
Defect Density ◽  
Ion Beam ◽  
Threshold Current ◽  
Gaas Layer ◽  
Cavity Surface ◽  
Surface Emitting Lasers ◽  
Vertical Cavity Surface ◽  
Emitting Lasers ◽  
Vertical Cavity

AbstractWe report for the first time a successful application of semi-insulating amorphous GaAs layer for surface passivation of index-guided vertical-cavity surface-emitting lasers. The amorphous GaAs layers on ion-beam-etched active region and mirror layers provide a significant improvement, more than 20%, in the threshold current density and differential quantum efficiency. The improvement of these performances is attributed to low defect density at the surface of active layers induced by amorphous GaAs.

THERMAL EFFECTS IN VERTICAL-CAVITY SURFACE-EMITTING LASERS

1994 ◽  
Vol 05 (04) ◽  
pp. 667-730 ◽  
Author(s):  
MAREK OSIŃSKI ◽  
WŁODZIMIERZ NAKWASKI
Keyword(s):  
Thermal Modeling ◽  
Longitudinal Mode ◽  
Transverse Mode ◽  
Threshold Current ◽  
Cavity Surface ◽  
Relative Distribution ◽  
Surface Emitting Lasers ◽  
Vertical Cavity Surface ◽  
Emitting Lasers ◽  
Vertical Cavity

A comprehensive review of temperature-related effects and thermal modeling of vertical-cavity surface-emitting lasers (VCSELs) is presented. The paper is divided into two major parts. First, the effects of temperature on device characteristics are discussed, including the temperature dependence of the longitudinal mode spectra, the threshold current, the transverse-mode structure, and the output power. A new condition is formulated for thermal matching of the Bragg mirrors and the spacer region and a comparison is made between characteristic temperatures for the threshold current (T0) and for the external quantum efficiency (Tη). In the second part, various approaches to thermal modeling of VCSELs are described. Both simplified and comprehensive thermal models are considered and both analytical and numerical approaches are discussed. A new analytical approximate method for analysis of heat-flux spreading in multilayer structures is described. The most important results obtained with the aid of these models are presented. In particular, we show that the current dependence of thermal resistance is very sensitive to VCSEL structure, and is strongly influenced by the relative distribution of heat sources and their location with respect to the heat sink.

Single-mode low threshold current multi-hole vertical-cavity surface-emitting lasers

2012 ◽  
Vol 21 (3) ◽  
pp. 034206 ◽  
Author(s):  
Zhen-Bo Zhao ◽  
Chen Xu ◽  
Yi-Yang Xie ◽  
Kang Zhou ◽  
Fa Liu ◽  
...  
Keyword(s):  
Single Mode ◽  
Threshold Current ◽  
Cavity Surface ◽  
Surface Emitting Lasers ◽  
Vertical Cavity Surface ◽  
Low Threshold ◽  
Emitting Lasers ◽  
Vertical Cavity
Sign in / Sign up

Export Citation Format

Share Document