Gallium arsenide signal processing at terahertz speeds

Ad Support : Nano Technology   Netbook    Technology News    Computer Software

Devices made from gallium arsenide could enable optical communication that is 1000 times faster than today’s electronic communication.

Solid State Electronics journal – Ultrafast nonlinear optical effects in semiconductor quantum wells resonantly driven by strong few-cycle terahertz pulses

Intraexciton transitions in semiconductor quantum wells are modulated by strong and tunable few-cycle terahertz pulses. Time-resolved terahertz-pump and optical-probe measurements demonstrate that the 1s heavy-hole and light-hole exciton resonances undergo large-amplitude spectral modulations when the terahertz radiation is tuned near the 1s–2p intraexciton transition. The strong nonlinear optical transients exhibit the characteristics of Rabi sidebands. The spectral features also reveal the dephasing properties of the optically dark 2p states. A microscopic theory shows that the 2p-dephasing rate is three times that of the 1s-state. The ultrafast nonlinear optical effects and their quantum nature suggest promising applications to ultrahigh-speed optical signal processing and quantum information processing in the THz region.

If you liked this article, please give it a quick review on Reddit, or StumbleUpon. Thanks

Supporting Advertising

Business Success
   How to Make Money    
Executive Jobs    
Paid Surveys

Thank You