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EnglishMajority carrier depletion has been proposed as a method to suppress the dark current originating from quasi-neutral regions in HgCdTe infrared focal plane array detectors. However, a very low doping level is usually required for the absorber layer, a task quite difficult to achieve in realizations. In order to address this point, we performed combined electromagnetic and electric simulations of a planar 5×5 pixel miniarray with 5 µm wide square pixels, assessing the effect of the absorber thickness, its doping level in the interval =[1014,1015]cm−3, and temperature in the interval 140 K–230 K, both in the dark and under illumination. Looking for a trade-off, we found that the path towards high-temperature operation has quite stringent requirements on the residual doping, whereas a reduction of the absorber thickness helps only moderately to reduce the dark current. Under illumination, interpixel cross talk is only slightly cut down by a decrease of temperature or absorber doping in the considered intervals, whereas it gets more effectively reduced by thinning the absorber.
Constraints and performance trade-offs in Auger-suppressed HgCdTe focal plane arrays / Vallone, Marco; Goano, Michele; Bertazzi, Francesco; Ghione, Giovanni; Hanna, Stefan; Eich, Detlef; Sieck, Alexander; Figgemeier, Heinrich. - In: APPLIED OPTICS. - ISSN 1559-128X. - 59:17(2020), pp. E1-E8. [10.1364/AO.385075]
| Titolo: | Constraints and performance trade-offs in Auger-suppressed HgCdTe focal plane arrays | |
| Autori: | ||
| Data di pubblicazione: | 2020 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1364/AO.385075 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| 2020Vallone_AO.pdf | 2020Vallone_AO | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
| 2020Vallone_AO_authors post-print.pdf | 2020Vallone_AO_authors post-print | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
http://hdl.handle.net/11583/2795364
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