SWIR nightglow radiation detection around room temperature with depletion-engineered HgCdTe on alternative substrates

Date

2020-01-01

Author

Livanelioglu, Can
Ozer, Yigit
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

267
views

0
downloads

Night vision applications utilize the reflected nightglow radiation in the short-wavelength infrared (SWIR) atmospheric window. Nevertheless, the low light intensity values require dark current densities on the order of nA/cm(2) for detection around room temperature. Currently, with new device architectures and developments in growth and surface passivation, very low dark current density values are achievable for 1.7 mu m cutoff InGaAs detectors near room temperature, and such detectors seem to be the leading choice for the nightglow detection applications. On the other hand, HgCdTe has not been thoroughly investigated for low-cost nightglow detection with 1.7 mu m cutoff, primarily due to its manufacture expenses for lattice-matched CdZnTe growth. In this study, we analyze the nightglow radiation detecting performance of the alternative substrate HgCdTe detectors near room temperature (T = 270 K) using computer simulations. It is assessed that alternative substrate HgCdTe cannot attain the required dark current density values due to Shockley-Read-Hall (SRH) recombination in the depletion region, if the heterojunction photodiode structure is adopted. To overcome the problem, depletion-engineered devices are designed where the depletion region is embedded within a larger bandgap HgCdTe, which suppresses the depletion region SRH similar to 1300 times. This reduces the dark current density to the desired order, for SRH lifetimes achievable with alternative substrate growth. Dark current densities as low as 0.26 nA/m(2) are shown to be possible for an SRH lifetime of tau = 3 mu s while maintaining the quantum efficiency similar to 85%. With this approach benefiting from alternative substrates and depletion engineering, HgCdTe can achieve InGaAs nightglow imaging performances near room temperature, and can benefit from less costly manufacture and broader application capability for nightglow radiation detection. (C) 2019 Optical Society of America.

Subject Keywords

Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics

URI

https://hdl.handle.net/11511/35416

Journal

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS

DOI

https://doi.org/10.1364/josab.37.000056

Collections

Department of Electrical and Electronics Engineering, Article

Suggestions

OpenMETU
Core

Broadband LWIR and MWIR metamaterial absorbers with a simple design topology: almost perfect absorption and super-octave band operation in MWIR band ÜSTÜN, Kadir; Sayan, Gönül (The Optical Society, 2017-07-01) Infrared absorbers are essential structures in the design of thermal emitters and thermal infrared imagers. In this study, we propose simple topologies of wideband metamaterial absorbers operating in the long-wave infrared or in the mid-wave infrared (MWIR) wavelengths of the electromagnetic spectrum where the atmosphere shows transparent behavior. Suggested metamaterial absorbers are mostly thin structures that consist of three functional layers from top to bottom: a periodically patterned metal layer, a p...
Stepwise technique for accurate and unique retrieval of electromagnetic properties of bianisotropic metamaterials HASAR, UĞUR CEM; Barroso, Joaquim J.; Sabah, Cumali; Kaya, Yunus; ERTUĞRUL, Mehmet (The Optical Society, 2013-04-01) Metamaterials (MMs) are artificial materials that have received attention recently because their built-in features create collective electromagnetic effects that are otherwise impossible, such as negative refraction, and because of their exotic electromagnetic applications, namely, perfect lens and invisibility cloaks. Depending on wave propagation characteristics, MMs possessing normally weak magneto-electric coupling coefficients start to exhibit stronger bianisotropic effects. Therefore, accurate electro...
Adaptive image enhancement based on clustering of wavelet coefficients for infrared sea surveillance systems Kara, A. Onur; Okman, O. Erman; Aytac, Tayfun (Elsevier BV, 2011-09-01) Most of the techniques developed for infrared (IR) image enhancement (IE) depend heavily on the scene, environmental conditions, and the properties of the imaging system. So, with a set of predefined scenario properties, a content-based IR-IE technique can be developed for better situational awareness. This study proposes an adaptive IR-IE technique based on clustering of wavelet coefficients of an image for sea surveillance systems. Discrete wavelet transform (DWT) of an image is computed and feature vecto...
Ultra-broadband long-wavelength infrared metamaterial absorber based on a double- layer metasurface structure ÜSTÜN, Kadir; Sayan, Gönül (The Optical Society, 2017-02-01) In this paper, we report a metamaterial absorber design that achieves a broad absorption band encompassing the whole long-wavelength infrared (LWIR) region. The structure consists of two parallel metasurfaces buried in an amorphous silicon dielectric layer, where the minimum size for all possible planar details does not go below 1 mu m, making the use of standard optical lithography possible for fabrication. The dielectric layer of the structure is placed over a metallic ground plane that inhibits the trans...
QWIP focal plane arrays on InP substrates for single and dual band thermal imagers Eker, S. U.; Arslan, Y.; Kaldirim, M.; Beşikci, Cengiz (Elsevier BV, 2009-11-01) Alternative material systems on InP substrate provide certain advantages for mid-wavelength infrared (MWIR), long-wavelength infrared (LWIR) and dual band MWIR/LWIR quantum well infrared photodetector (QWIP) focal plane arrays (FPAs). While InP/InGaAs and InP/InGaAsP LWIR QWIPs provide much higher responsivity, when compared to the AlGaAs/CaAs QWIPs, AllnAs/InGaAs system facilitates completely lattice matched single band MWIR and dual band MWIR/LWIR FPAs.

Citation Formats

C. Livanelioglu, Y. Ozer, and S. Kocaman, “SWIR nightglow radiation detection around room temperature with depletion-engineered HgCdTe on alternative substrates,” JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, pp. 56–66, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35416.