High quantum efficiency Type II superlattice N structure photodetectors with thin intrinsic layers

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ERGÜN Y., HOŞTUT M., TANSEL T., KILIÇ A., Muti A., TURAN R., ...Daha Fazla

Proc. SPIE, Infrared Technology and Applications XXXIX, edited, Baltimore, Maryland, USA, 29 Nisan - 01 Mayıs 2013 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1117/12.2016133
  • Basıldığı Şehir: Baltimore, Maryland, USA
  • Anahtar Kelimeler: N-structure InAs/AlSb/GaSb superlattice pin photodiode, Mid-Wave-Infrared Photodiode, cut-off wavelengths, spectral response of InAs/GaSb
  • Hacettepe Üniversitesi Adresli: Evet

Özet

We report on the development of InAs/AlSb/GaSb based N-structure superlattice pin photodiode. In this new design, AlSb layer in between InAs and GaSb layers acts as an electron barrier that pushes electron and hole wave functions towards the GaSb/InAs interface to perform strong overlap under reverse bias. Experimental results show that, with only 20 periods of intrinsic layers, dark current density and dynamic resistance at -50 mV bias are measured as 6x10(-3) A/cm(2) and 148 Omega cm(2) at 77K, respectively. Under zero bias, high spectral response of 1.2A/W is obtained at 5 mu m with 50% cut-off wavelengths (lambda(c)) of 6 mu m. With this new design, devices with only 146 nm thick i-regions exhibit a quantum efficiency of 42% at 3 mu m with front-side illimunation and no anti-reflection coatings.