TY - DATA T1 - Intersubband Quantum Disc-in-Nanowire Photodetectors with Normal-Incidence Response in the Long-Wavelength Infrared PY - 2017/12/19 AU - Mohammad Karimi AU - Magnus Heurlin AU - Steven Limpert AU - Vishal Jain AU - Xulu Zeng AU - Irene Geijselaers AU - Ali Nowzari AU - Ying Fu AU - Lars Samuelson AU - Heiner Linke AU - Magnus T. Borgström AU - Håkan Pettersson UR - https://acs.figshare.com/articles/journal_contribution/Intersubband_Quantum_Disc-in-Nanowire_Photodetectors_with_Normal-Incidence_Response_in_the_Long-Wavelength_Infrared/5734914 DO - 10.1021/acs.nanolett.7b04217.s001 L4 - https://ndownloader.figshare.com/files/10094487 KW - low-bandgap InAsP quantum discs KW - generalizable insight KW - Normal-Incidence Response KW - 20 μ m KW - broadband nanowire photodetectors KW - nanowire heterostructures KW - Semiconductor nanowires KW - incident radiation KW - intersubband nanowire heterostructure array photodetectors KW - broadband photodetectors KW - InP nanowires KW - photonic crystal KW - intersubband transitions KW - Intersubband Quantum Disc-in-Nanowire Photodetectors KW - nanostructured portion KW - near-infrared regions N2 - 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. ER -