User: Guest  Login
Author(s):
Zedler, Michael; Janke, Christof; Bolivar, P. Haring; Kurz, Heinrich; Künzel, H. 
Title:
Improved Coherent Terahertz Emission by Modification of the Dielectric Environment 
Abstract:
We present a generally applicable approach to enhance the conversion efficiency from optical input to usable coherent output power for THz emitters based on optically excited charge carriers. Guided by numerical simulations, the dielectric environment of the emitter is modified to improve radiation rate and spatial emission characteristics. The modifications comprise a sapphire layer applied on the semiconductor surface and a gold backside metallization. Comparison between a standard InGaAs semi...    »
 
Keywords:
field emission, gallium arsenide, III-V semiconductors, indium compounds, numerical analysis, semiconductor device metallisation 
Journal title:
Applied Physics Letters 
Year:
2003 
Journal volume:
83 
Month:
nov 
Journal issue:
20 
Pages contribution:
4196--4198