Quantum cascade detector utilizing the diagonal-transition scheme for high quality cavities.
Opt Express
; 23(5): 6283-91, 2015 Mar 09.
Article
em En
| MEDLINE
| ID: mdl-25836849
ABSTRACT
A diagonal optically active transition in a quantum cascade detector is introduced as optimization parameter to obtain quality factor matching between a photodetector and a cavity. A more diagonal transition yields both higher extraction efficiency and lower noise, while the reduction of the absorption strength is compensated by the resonant cavity. The theoretical limits of such a scheme are obtained, and the impact of losses and cavity processing variations are evaluated. By optimizing the quantum design for a high quality cavity, a specific detectivity of 10(9) Jones can be calculated for λ = 8µm and T = 300K.
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MEDLINE
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En
Ano de publicação:
2015
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Article