Pixel scaling in infrared focal plane arrays

Author
Catrysse, Peter B.
Skauli, Torbjørn
Date Issued
2013
Keywords
Bildesensorer
Infrarødsystemer
Permalink
https://ffi-publikasjoner.archive.knowledgearc.net/handle/20.500.12242/480
DOI
10.1364/AO.52.000C72
Collection
Articles
Description
Catrysse, Peter B.; Skauli, Torbjørn. Pixel scaling in infrared focal plane arrays. Applied Optics 2013 ;Volum 52.(7) s. C72-C77
1032169.pdf
Size: 491k
Abstract
We discuss effects that arise in pixels of IR focal plane arrays (FPAs) when pixel size scales down to approach the wavelength of the incident radiation. To study these effects, we perform first-principles electromagnetic simulations of pixel structures based on a mercury–cadmium–telluride photoconductor for use in FPAs. Specifically, we calculate the pixel quantum efficiency and crosstalk as pixel size scales from 16 μm, which is in the range of current detectors, down to 0.75 μm, corresponding to subwavelength detectors. Our numerical results indicate the possibility of wavelength-size (∼4  μm ) and even subwavelength-size (∼1  μm ) pixels for IR FPAs. In addition, we explore opportunities that emerge for controlling light with subwavelength structures inside FPA pixels. As an illustration, we find that the low-pass filtering effect of a metal film aperture can exemplify the impact and the possible role that wavelength-scale optics plays in very small pixels. © 2013 Optical Society of America
View Meta Data