Dual-band ultraviolet-short-wavelength infrared imaging via luminescent downshifting with colloidal quantum dots
Name
Geyer-2013-Dual-band ultraviole.pdf
Size
2.17 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Geyer, Scott Mitchell
Bawendi, Moungi G.
Scherer, Jennifer M.
Jack, Michael D.
Jaworski, Frank B.
Date Issued
September 2013
Journal
Journal of Nanophotonics
Publisher
SPIE
Citation
Geyer, Scott M. “Dual-band ultraviolet-short-wavelength infrared imaging via luminescent downshifting with colloidal quantum dots.” Journal of Nanophotonics 7, no. 1 (January 10, 2013): 073083. © 2013 Society of Photo-Optical Instrumentation Engineers
Version
Final published version
Abstract
The performance of short-wavelength infrared (SWIR) cameras in the visible and ultraviolet (UV) regions is limited by the absorption of high-energy photons in inactive regions of the imaging array. Dual-band UV-SWIR imaging can be achieved by using PbS colloidal quantum dots (CQD) to downshift incident UV light to the SWIR band. The CQD downshifting layer has minimal impact on the SWIR imaging performance and greatly increases the UV sensitivity of an InGaAs camera. A dual-lens design in which the QDs are incorporated on a removable substrate is demonstrated, which provides UV sensitivity without modification of the InGaAs camera focal plane array. A single-lens design in which the QDs are deposited directly on the focal plane array is demonstrated using both a standard InGaAs focal plane and a substrate-thinned focal plane. Higher UV resolution for the substrate-thinned focal plane is observed.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1117/1.jnp.7.073083
