We report observation of unpolarized intersubband photocurrent (PC) in quantum-well infrared photodetector (QWIP) based on Te doped GaInAsN/AlGaAs multiple-quantum well structures (MQWs). The unpolraized photocurrent spectrum is peaked at 2.4 μm in front and wedge waveguide configuration illumination. Clear PC signals are observed up to room temperature. Reference sample not containing nitrogen with the same MQW structure shows p polarized intersubband photoresponse as expected in the conduction band of III-V semiconductors MQWs.
|Number of pages||3|
|Journal||Physica Status Solidi (C) Current Topics in Solid State Physics|
|State||Published - 2008|
|Event||7th International Conference of Nitride Semiconductors, ICNS-7 - Las Vegas, NV, United States|
Duration: 16 Sep 2007 → 21 Sep 2007