Yazar "Sökmen, İsmail" için listeleme
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Broadband staircase quantum well infrared photodetector with low dark current
Ergün, Yüksel; Hoştut, Mustafa; Eker, Süleyman Umut; Sökmen, İsmail (Elsevier Science BV, 2006)We present a theoretical investigation of a novel staircase-like quantum well infrared photodetector (QWIP). It detects wavelengths between 8.8 mu m and 12.3 mu m at an applied electric field of F= 6 x 10(4) V/cm at room ... -
Broadband staircase quantum well infrared photodetector: working in long wavelength infrared range (LWIR)
Hoştut, Mustafa; Kartal, D.; Ergün, Yüksel; Sökmen, İsmail (Wiley-V C H Verlag GMBH, 2007)We present a theoretical investigation of a staircase-like quantum well infrared photodetector (QWIP). it detects wavelength between 7.6 mu m and 13.5 mu m range at an applied electric field of F = 1.9x10(4) V/cm at 77 K. ... -
Effect of exchange-correlation potential on the plasmon dispersions in a doped symmetrical double quantum well
Tüzemen, E. Senadim; Türkoğlu, A.; Ergün, Yüksel; Sökmen, İsmail; Tanatar, B. (Wiley-V C H Verlag GMBH, 2007)We have calculated the plasmon dispersion relations in a doped double quantum well with and without exchange-correlation potential added to the effective potential of the system. The calculations were done for high and low ... -
Intersubband electron transition across a staircase potential containing quantum wells: light emission
Ergün, Yüksel; Hoştut, Mustafa; Eker, Süleyman Umut; Sökmen, İsmail (Academic Press LTD Elsevier Science LTD, 2005)We present a theoretical investigation of a novel staircase-like light emitter based on the GaAs/GaxAl1-xAs material system. The emission wavelength is around 12 mum. The device operation is based on the intersubband ... -
A new approach to quantum well infrared photodetectors: Staircase-like quantum well and barriers
Eker, Süleyman Umut; Hoştut, Mustafa; Ergün, Yüksel; Sökmen, İsmail (Elsevier Science BV, 2006)We present a theoretical investigation of a novel staircase-like quantum well infrared photodetector (QWIP). The proposed structure makes use of quantum wells and barriers with increasing Al content both in the wells and ... -
Three-color broadband asymmetric quantum well infrared photodetectors in long wavelength infrared range (LWIR)
Hoştut, Mustafa; Alyörük, M.; Ergün, Yüksel; Sökmen, İsmail (Springer, 2010)A theoretical investigation of a GaAs/AlGaAs-material-system-based four quantum well infrared detector structures consisting of ten periods of three asymmetric quantum well units are presented. Each quantum well in the ... -
Tunable long-wavelength broad band asymmetric quantum well infrared photodetector
Hoştut, Mustafa; Kartal, D.; Ergün, Yüksel; Sökmen, İsmail (IOP Publishing LTD, 2007)We present a theoretical investigation of a GaAs/AlGaAs infrared detector consisting of three asymmetric quantum wells. Each well is designed to yield absorption and a photoresponse at peak wavelengths of 8.2 mu m, 9.5 mu ... -
The variation of electronic properties with the doping concentration of modulation-doped AlxGa1-xAs-GaAs double quantum wells
Ungan, Fatih; Öztürk, Emine; Ergün, Yüksel; Sökmen, İsmail (Academic Press LTD Elsevier Science LTD, 2007)In this paper we have calculated the sub-band structure and the confinement potential of modulation-doped Ga1-xAlxAs-GaAs double quantum wells as a function of the doping concentration. The electronic properties of this ...
