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Intersubband Quantum Disc-in-Nanowire Photodetectors with Normal-Incidence Response in the Long-Wavelength Infrared
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2018 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 18, no 1, p. 365-372Article in journal (Refereed) Published
Abstract [en]

Semiconductor nanowires have great potential for realizing broadband photodetectors monolithically integrated with silicon. However, the spectral range of such detectors has so far been limited to selected regions in the ultraviolet, visible, and near-infrared regions. Here, we report on the first intersubband nanowire heterostructure array photodetectors exhibiting a spectrally resolved photoresponse from the visible to long-wavelength infrared. In particular, the infrared response from 3 to 20 μm is enabled by intersubband transitions in low-bandgap InAsP quantum discs synthesized axially within InP nanowires. The intriguing optical characteristics, including unexpected sensitivity to normal incident radiation, are explained by excitation of the longitudinal component of optical modes in the photonic crystal formed by the nanostructured portion of the detectors. Our results provide a generalizable insight into how broadband nanowire photodetectors may be designed and how engineered nanowire heterostructures open up new, fascinating opportunities for optoelectronics.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018. Vol. 18, no 1, p. 365-372
Keywords [en]
infrared photodetectors, intersubband photodetectors, Nanowires, photonic crystals, quantum discs
National Category
Other Engineering and Technologies
Identifiers
URN: urn:nbn:se:kth:diva-221689DOI: 10.1021/acs.nanolett.7b04217ISI: 000420000000049PubMedID: 29256612Scopus ID: 2-s2.0-85040312470OAI: oai:DiVA.org:kth-221689DiVA, id: diva2:1176317
Funder
Swedish Research CouncilSwedish Agency for Economic and Regional GrowthKnut and Alice Wallenberg Foundation, 2016.0089Swedish Foundation for Strategic Research Swedish Energy Agency, P38331-1Carl Tryggers foundation EU, Horizon 2020, 641023Science for Life Laboratory - a national resource center for high-throughput molecular bioscience
Note

QC 20180122

Available from: 2018-01-22 Created: 2018-01-22 Last updated: 2018-01-29Bibliographically approved

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Fu, Ying

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CiteExportLink to record
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  • apa
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