New resonant cavity-enhanced absorber structures for mid-infrared detector application

Details New resonant cavity-enhanced absorber structures for mid-infrared detector application New resonant cavity-enhanced absorber structures for mid-infrared detector application

2012-04-01

arxiv.org/abs/1204.0226v1

Physics

Optics

7 pages, 5 figures, Numerical Simulations of Optoelectronic Devices (NUSOD) 2011 Conference; Opt Quant Electron, 2011

Scientific paper

A new dielectric Fabry-Perot cavity was designed for a resonant enhancing optical absorption by a thin absorber layer embedded into the cavity. In this cavity, the front mirror is a subwavelength grating with $\sim 100$% retroreflection. For a HgCdTe absorber in a matching cavity of the new type, the design is shown to meet the combined challenges of increasing the absorbing efficiency of the entire device up to $\sim 100$% and reducing its size and overall complexity, compared to a conventional resonant cavity enhanced HgCdTe absorber, while maintaining a fairly good tolerance against the grating's fabrication errors.

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