Increased photocurrent in quantum dot infrared photodetector by subwavelength hole array in metal thin film
2010 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 96, no 23, 231110- p.Article in journal (Refereed) Published
Photocurrent enhancement in quantum dot (QD) infrared photodetector (QDIP) with an optical grating of subwavelength hole array in a thin metal film has been studied by calculating the transmission and diffraction of the infrared optical field through the grating and the light-matter interaction between the transmitted optical field and electrons confined in the QD. It is shown that due to the small aspect ratio of realistic QDs in QDIPs, the light diffraction due to the surface plasmon effect at the metal-semiconductor surface and the photonic subwavelength hole array structure is dominant in increasing the photocurrent.
Place, publisher, year, edition, pages
2010. Vol. 96, no 23, 231110- p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-27515DOI: 10.1063/1.3449117ISI: 000278695900010ScopusID: 2-s2.0-77953508938OAI: oai:DiVA.org:kth-27515DiVA: diva2:385432
QC 201101112011-01-112010-12-132012-05-07Bibliographically approved