Browsing by Author "Ergun, Y."
Now showing items 1-10 of 10
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Broadband asymmetric quantum-well infrared photodetector in long-wavelength infrared range (LWIR)
Hostut, M.; Ergun, Y.; Sokmen, I. (IEEE, 2007)A theoretical investigation of a GaAs-AlGaAs infrared detector consisting of three asymmetric quantum wells is presented. Each quantum well is sensitive to yield absorption and a photoresponse at peak wavelengths of 8 pro, ... -
Broadband staircase quantum well infrared photodetector with low dark current
Ergun, Y.; Hostut, M.; Eker, S. U.; Sokmen, I. (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)
Hostut, M.; Kartal, D.; Ergun, Y.; Sokmen, I. (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
Tuezemen, E. Senadim; Turkoglu, A.; Ergun, Y.; Sokmen, I.; 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 ... -
Electrical performance of InAs/AlSb/GaSb superlattice photodetectors
Tansel, T.; Hostut, M.; Elagoz, S.; Kilic, A.; Ergun, Y.; Aydinli, A. (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2016)Temperature dependence of dark current measurements is an efficient way to verify the quality of an infrared detector. Low dark current density values are needed for high performance detector applications. Identification ... -
Fourier transform technique in variational treatment of two-electron parabolic quantum dot
Sakiroglu, S.; Yildiz, A.; Dogan, Ue.; Akgungor, K.; Epik, H.; Ergun, Y.; Sari, H.; Sokmen, I. (IOP PUBLISHING LTD, 2009)In this work, we propose an efficient method of reducing the computational effort of variational calculation with a Hylleraas-like trial wavefunction. The method consists of introducing integra transforms for the terms as ... -
Ground state energy of excitons in quantum dot treated variationally via Hylleraas-like wavefunction
Sakiroglu, S.; Dogan, Ue.; Yildiz, A.; Akgungor, K.; Epik, H.; Ergun, Y.; Sari, H.; Sokmen, I. (IOP PUBLISHING LTD, 2009)In this work, the effects of quantum confinement on the ground state energy of a correlated electron-hole pair in a spherical and in a disc-like quantum dot have been investigated as a function of quantum dot size. Under ... -
The investigation of quantum efficiency constituents of InAs/AlSb/GaSb based N structure type-II SL photodetectors with InAlAs interface
Kilic, A.; Tansel, T.; Hostut, M.; Elagoz, S.; Ergun, Y. (IOP PUBLISHING LTD, 2018)We report on the optical properties of InAs/AlSb/GaSb based Type-II superlattice N-structure with p on n configuration. The detector structure is designed to operate in the mid wavelength infrared range with 50% cut-off ... -
Tunable long-wavelength broad band asymmetric quantum well infrared photodetector
Hostut, M.; Kartal, D.; Ergun, Y.; Sokmen, I. (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 ... -
VARIATIONAL COMPUTATIONS FOR EXCITONS IN QUANTUM DOTS: A QUANTUM MONTE CARLO STUDY
Yildiz, A.; Sakiroglu, S.; Dogan, U.; Akgungor, K.; Epik, H.; Sokmen, I.; Sari, H.; Ergun, Y. (WORLD SCIENTIFIC PUBL CO PTE LTD, 2011)A study of variational wave functions for calculation of the ground-state energies of excitons confined in a two-dimensional (2D) disc-like and three-dimensional (3D) spherical parabolic GaAs quantum dots (QDs) is presented. ...