Details

Autor(en) / Beteiligte

• Zhai, Shen-Qiang
• Liu, Jun-Qi
• Liu, Feng-Qi
• Wang, Zhan-Guo

Titel

A normal incident quantum cascade detector enhanced by surface plasmons

Ist Teil von

• Applied physics letters, 2012-04, Vol.100 (18), p.181104-181104-4

Ort / Verlag

American Institute of Physics

Erscheinungsjahr

2012

Link zum Volltext

Quelle

AIP - American Institute of Physics : Revues

Beschreibungen/Notizen

• We demonstrate a normal incident quantum cascade detector excited by surface plasmons resonance using an Au two-dimensional hole array integrated on top of the detector absorption region. With normal incidence, the device has a maximal responsivity value of 8.4 mA/W at 160K and can work up to room temperature with a responsivity of 1.02 mA/W. Compared with the 45° polished edge coupling device, the two-dimensional hole array can lead to quantum efficiency enhancement at most measured temperatures, and at 140K the quantum efficiency is enhanced most strongly by 69%.