Normal-incidence mid-infrared photodetection via intraband transitions in InGaAs/InP multiple quantum well nanowire arrays
Abstract
Recently, InGaAs/InP multiple quantum well nanowires grown by selective area epitaxy have been demonstrated with uniform morphology and high optical quality. The InGaAs quantum wells wrapping around the nanowire core are formed with both axial and radial components. As such the radial quantum well configuration presents a unique advantage for the realization of intraband absorption of normal-incidence light in the nanowires, which cannot be achieved in conventional planar quantum well structures due to polarization selection rules. We report here mid-infrared intraband transitions within the atmospheric window (3–5 μm) in InP nanowire arrays embedded with five InGaAs quantum wells under normal-incidence light. The light absorption coefficient of the quantum wells is modeled, and the absorption peak indicates a bound-to-continuum transition. The intraband photocurrent shows a linear dependence on the incident power, while the interband photoresponse is sublinear due to the surface states of the nanowires. These nanowires with radial quantum wells open up great opportunities for developing next-generation mid- to long-wavelength infrared photodetectors and focal plane arrays.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (15)
Yue Bian
ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University 1 , Canberra ACT 2600,
Fanlu Zhang
ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University 1 , Canberra ACT 2600,
Zhe Li
Dawei Liu
Jingshi Yan
ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University 1 , Canberra ACT 2600,
Gilberto A. Umana Membreno
ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS), Department of Electrical, Electronic and Computer Engineering, The University of Western Australia 2 , Perth, WA 6009,
Wenwu Pan
Department of Electrical, Electronic and Computer Engineering and ARC Centre of Excellence on Transformative Meta-Optical Systems (TMOS), The University of Western Australia 1 , 35 Stirling Highway, Crawley, Western Australia 6009,
Wen Lei
Lorenzo Faraone
Department of Electrical, Electronic and Computer Engineering and ARC Centre of Excellence on Transformative Meta-Optical Systems (TMOS), The University of Western Australia 1 , 35 Stirling Highway, Crawley, Western Australia 6009,
Li Li
Mykhaylo Lysevych
Australian National Fabrication Facility, The Australian National University 3 , Canberra ACT 2600,
Dragomir Neshev
ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University 1 , Canberra ACT 2600,
Hark Hoe Tan
Chennupati Jagadish
ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University 1 , Canberra ACT 2600,
Lan Fu