Double-barrier long wavelength SiGe/Si heterojunction internal photoemission infrared photodetectors

Date

2004-01-01

Author

Aslan, B
Turan, Raşit
Liu, HC
Baribeau, JM
Buchanan, M
Chow-Chong, P

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

71
views

0
downloads

This work studies the effect of a double barrier on the photoresponse spectrum of SiGe/Si heterojunction internal photoemission infrared photodetectors. Results are compared with those of a single barrier sample which has nominally the same parameters. It is shown that the cut-off wavelength of the multi-barrier device depends on the operating temperature; therefore, it can be tuned to the desired region within the device capacity by changing the device temperature. The proof of concept device, which has two Si1-xGex/Si junctions with x=0.1 and x=0.23, allows the tuning of the cut-off wavelength from 19.9 mum to 11.7 mum for 10 K and 50 K, respectively.

Subject Keywords

Physics and Astronomy (miscellaneous), General Physics and Astronomy

URI

https://hdl.handle.net/11511/42119

Journal

APPLIED PHYSICS B-LASERS AND OPTICS

DOI

https://doi.org/10.1007/s00340-003-1343-z

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Multidimensional quantum tunneling in the Schwinger effect Dumlu, Cesim K. (American Physical Society (APS), 2016-03-22) We study the Schwinger effect, in which the external field having a spatiotemporal profile creates electron-positron pairs via multidimensional quantum tunneling. Our treatment is based on the trace formula for the QED effective action, whose imaginary part is represented by a sum over complex worldline solutions. The worldlines are multiperiodic, and the periods of motion collectively depend on the strength of spatial and temporal inhomogeneity. We argue that the classical action that leads to the correct ...
Generation of 2-mu J 410-fs pulses from a single-mode chirped-pulse fiber laser operating at 1550 nm Pavlova, Svitlana; Rezaei, Hossein; Pavlov, Ihor; Kalaycioglu, Hamit; Ilday, Fatih Omer (Springer Science and Business Media LLC, 2018-10-01) We report on a simple, robust, femtosecond chirped-pulse-amplification system, based on Er-and Er-Yb-doped fibers, operating at a central wavelength of 1555 nm. The entire system is constructed from commercially available fiber components, except the grating compressor, for easy duplication by other researchers. The laser system produces chirped pulses with up to 4 mu J of pulse energy at 250 kHz. After dechirping, the pulse duration is 410 fs and the pulse energy is reduced to 2 mu J. The repetition rate o...
Broadband spectral splitting of white light via 2D diffractive optical elements Başay, Yalın; Yüce, Emre (The Scientific and Technological Research Council of Turkey, 2018-10-01) An effective way of increasing the efficiency of solar cells is to spectrally split sunlight into several frequencies and absorb each frequency using appropriate photovoltaic materials. In this study, we establish a method to show spectral splitting of broadband solar light via iteratively optimized diffractive optical elements. We develop an algorithm in order to calculate 2D holographic patterns that focus two different frequencies to designated positions.
A Numerical Study of a Modular Sparse Grad-Div Stabilization Method for Boussinesq Equations Demir, Medine; Kaya Merdan, Songül (2019-10-10) This study presents a modular sparse grad-div stabilization method for solving the Boussinesq equations. Unlike the usual grad-div stabilization which produces fully coupled block matrices, the proposed stabilization method produces block upper triangular matrices. Thus, the proposed method is more attractive in terms of both its computational cost and solution accuracy. We provide unconditional stability results for velocity and temperature. Two numerical experiments are performed to demonstrate the effici...
Thermodynamic study on the magnetic transition and structural phase transition in [(CH3)(2)NH2][Na0.5Fe0.5(HCOO)(3)] by using the Landau phenomenological model Yurtseven, Hasan Hamit (AIP Publishing, 2020-11-01) In this study, we apply the Landau phenomenological model to describe magnetic transition and structural phase transition in a metal formate framework (MOF) of the ferromagnetic [(CH3)(2)NH2][Na0:5Fe0:5(HCOO)(3)], namely, DMNaFe. By using the observed data from the literature for the magnetization, the excess heat capacity (Delta CP), and the dielectric constant (e), we predict some thermodynamic quantities as a function of temperature close to the magnetic transition (T-M 1/4 8:5K) and structural (T-c 1/4 ...

Citation Formats

B. Aslan, R. Turan, H. Liu, J. Baribeau, M. Buchanan, and P. Chow-Chong, “Double-barrier long wavelength SiGe/Si heterojunction internal photoemission infrared photodetectors,” APPLIED PHYSICS B-LASERS AND OPTICS, pp. 225–228, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42119.