InGaAs nBn SWIR detector design with lattice-matched InAlGaAs barrier

Date

2019-01-01

Author

Uzgur, Fatih
Kocaman, Serdar

Metadata

Show full item record

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

Item Usage Stats

210
views

0
downloads

Dark current optimization with band gap engineering has been numerically studied for InGaAs nBn type infrared photodetectors. Undoped InAlGaAs grading layers are utilized in constructing the barrier and dipole delta-doped layers are placed in both sides of the graded layers for eliminating valence band offset. As a result, the high band gap barrier layer blocks the majority carriers and allows minority carrier flow while minimizing various dark current components, as expected from an nBn detector. Substantial improvement has been shown in the dark current level without compromising any photoresponse compared to the conventional pn junction and recently proposed all InGaAs nBn type photodetectors.

Subject Keywords

Infrared imaging, Barrier photodetectors, Optoelectronic devices

URI

https://hdl.handle.net/11511/32013

Journal

TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES

DOI

https://doi.org/10.3906/elk-1802-197

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Barrier engineering for HgCdTe unipolar detectors on alternative substrates Uzgur, Fatih; Kocaman, Serdar (2019-03-01) Delta-doped layers together with compositionally grading have been utilized to get nBn configurations for the HgCdTe material system in all the short-wave (SWIR), medium-wave (MWIR) and long-wave (LWIR) infrared bands. Shockley Read Hall (SRH), trap-assisted tunneling (TAT), Auger and radiative recombination mechanisms have been included in the analyses and strong suppression of SRH and TAT currents have been demonstrated with the designed structures. This methodology is especially useful when the carrier l...
High performance focal plane array technologies from short to long wavelength infrared bands Arslan, Yetkin; Beşikci, Cengiz; Department of Electrical and Electronics Engineering (2014) This thesis work covers the development of three different state of the art infrared sensor technologies: quantum well infrared photodetectors (QWIPs), HgCdTe sensors and extended InGaAs photodetectors. QWIP is the leading member of the quantum structure infrared photodetector family providing excellent uniformity and stability with field proven performance. The utilization of the InP/In0.48Ga0.52As multi-quantum well structure (instead of the standard AlGaAs/GaAs material system) for the implementation of ...
Heterocycle-based push-pull NLOphores: investigation of linear and non-linear optical properties Karagöllü, Başak; Dengiz, Çağatay; Department of Chemistry (2022-12-19) Organic nonlinear optical materials are substantial in the technology era we live in, due to their applications in telecommunications, data storage, real-time target recognition, optoelectronics, and optical signal processing. The distinct intramolecular charge transfer (ICT) properties of conjugated push-pull chromophores provide high polarization and thus a strong NLO response can be obtained. NLOphores are designed to obtain more efficient and rapid NLO responses and [2+2] cycloaddition-retroelectrocycli...
Analysis of vision aided inertial navigation systems Yuksel, Yigiter; Kaygisiz, H. Burak (2006-04-19) We propose in this paper a method to integrate inertial navigation systems with electro optic imaging devices. Our method is based on updating the inertial navigation system in a Kalman filter structure using line of sight measurements obtained from a camera. The proposed method is analyzed based on a UAV scenario generated by our trajectory simulator and the results are provided here. The results show that even a single vision aid can improve the performance of inertial navigation system.
Quantum Monte Carlo methods for fermionic systems : beyond the fixed-node approximation Dugan, Nazım; Erkoç, Şakir; Department of Physics (2010) Developments are made on the quantum Monte Carlo methods towards increasing the precision and the stability of the non fixed-node projector calculations of fermions. In the first part of the developments, the wavefunction correction scheme, which was developed to increase the precision of the di usion Monte Carlo (DMC) method, is applied to non fixed-node DMC to increase the precision of such fermion calculations which do not have nodal error. The benchmark calculations indicate a significant decrease of st...

Citation Formats

F. Uzgur and S. Kocaman, “InGaAs nBn SWIR detector design with lattice-matched InAlGaAs barrier,” TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES, pp. 1–10, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32013.