Plasmonic-Layered InAs/InGaAs Quantum-Dots-in-a-Well Pixel Detector for Spectral-Shaping and Photocurrent Enhancement

The algorithmic spectrometry as an alternative to traditional approaches has the potential to become the next generation of infrared (IR) spectral sensing technology, which is free of physical optical filters, and only a very small number of data are required from the IR detector. A key requirement...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2020-09, Vol.10 (9), p.1827
Main Authors: Hwang, Jehwan, Ku, Zahyun, Jeon, Jiyeon, Kim, Yeongho, Kim, Jun Oh, Kim, Deok-Kee, Urbas, Augustine, Kim, Eun Kyu, Lee, Sang Jun
Format: Article
Language:English
Subjects:
Electric fields
Electric filters
electromagnetic simulation
Filters
Fourier transforms
Indium gallium arsenides
Information processing
metal hole array
Molecular beam epitaxy
Optical filters
Photoelectric effect
Photoelectric emission
plasmonic resonance
Plasmonics
Quantum dots
quantum dots-in-a-well
Response spectra
Scientific imaging
Sensors
spectral imaging
Spectrometry
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Summary:The algorithmic spectrometry as an alternative to traditional approaches has the potential to become the next generation of infrared (IR) spectral sensing technology, which is free of physical optical filters, and only a very small number of data are required from the IR detector. A key requirement is that the detector spectral responses must be engineered to create an optimal basis that efficiently synthesizes spectral information. Light manipulation through metal perforated with a two-dimensional square array of subwavelength holes provides remarkable opportunities to harness the detector response in a way that is incorporated into the detector. Instead of previous experimental efforts mainly focusing on the change over the resonance wavelength by tuning the geometrical parameters of the plasmonic layer, we experimentally and numerically demonstrate the capability for the control over the shape of bias-tunable response spectra using a fixed plasmonic structure as well as the detector sensitivity improvement, which is enabled by the anisotropic dielectric constants of the quantum dots-in-a-well (DWELL) absorber and the presence of electric field along the growth direction. Our work will pave the way for the development of an intelligent IR detector, which is capable of direct viewing of spectral information without utilizing any intervening the spectral filters.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano10091827