NDLI: Simulation of Small-Pitch HgCdTe Photodetectors

Content Provider	Springer Nature Link
Author	Vallone, Marco Goa, Michele Bertazzi, Francesco Ghione, Giovanni Schirmacher, Wilhelm Hanna, Stefan Figgemeier, Heinrich
Copyright Year	2017
Abstract	Recent studies indicate as an important technological step the development of infrared HgCdTe-based focal plane arrays (FPAs) with sub-wavelength pixel pitch, with the advantage of smaller volume, lower weight, and potentially lower cost. In order to assess the limits of pixel pitch scaling, we present combined three-dimensional optical and electrical simulations of long-wavelength infrared HgCdTe FPAs, with 3 μm, 5 μm, and 10 μm pitch. Numerical simulations predict significant cavity effects, brought by the array periodicity. The optical and electrical contributions to spectral inter-pixel crosstalk are investigated as functions of pixel pitch, by illuminating the FPAs with Gaussian beams focused on the central pixel. Despite the FPAs being planar with 100% pixel duty cycle, our calculations suggest that the total crosstalk with nearest-neighbor pixels could be kept acceptably small also with pixels only $$3\,\mu \hbox {m}$$ wide and a diffraction-limited optical system.
Starting Page	5458
Ending Page	5470
Page Count	13
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	46
Issue Number	9
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2017-03-09
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	HgCdTe infrared detectors LWIR numerical simulation crosstalk focal plane arrays FDTD Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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Small-Pitch HgCdTe Photodetectors

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