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Individual speckle diffraction based 1D and 2D Random Grating Fabrication for detector and solar energy harvesting applications.

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Bibliographic Details
Title: Individual speckle diffraction based 1D and 2D Random Grating Fabrication for detector and solar energy harvesting applications.
Authors: Bingi J; Center for Optical and Laser Engineering (COLE), School of Mechanical and Aerospace Engineering, Nanyang technological University, SINGAPORE 639798., Murukeshan VM; Center for Optical and Laser Engineering (COLE), School of Mechanical and Aerospace Engineering, Nanyang technological University, SINGAPORE 639798.
Source: Scientific reports [Sci Rep] 2016 Feb 04; Vol. 6, pp. 20501. Date of Electronic Publication: 2016 Feb 04.
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Language: English
Journal Info: Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: PubMed not MEDLINE
Imprint Name(s): Original Publication: London : Nature Publishing Group, copyright 2011-
Abstract: Laser speckles and speckle patterns, which are formed by the random interference of scattered waves from optically rough surfaces, have found tremendous applications in a wide range of metrological and biomedical fields. Here, we demonstrate a novel edge diffraction phenomenon of individual speckle for the fabrication of 1D and 2D micron and sub-micron size random gratings. These random gratings exhibit broadband response with interesting diffusive diffraction patterns. As an immediate application for solar energy harvesting, significant reduction in transmission and enhanced absorption in thin "Si-random grating-Si" sandwich structure is demonstrated. This work has multifaceted significance where we exploited the individual speckle diffraction properties for the first time. Besides the solar harvesting applications, random gratings are suitable structures for fabrication of theoretically proposed random quantum well IR detectors and hence expected that this work will augur well for such studies in the near future.
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Entry Date(s): Date Created: 20160205 Date Completed: 20160913 Latest Revision: 20181113
Update Code: 20250114
PubMed Central ID: PMC4740903
DOI: 10.1038/srep20501
PMID: 26842242
Database: MEDLINE
Description
Abstract:Laser speckles and speckle patterns, which are formed by the random interference of scattered waves from optically rough surfaces, have found tremendous applications in a wide range of metrological and biomedical fields. Here, we demonstrate a novel edge diffraction phenomenon of individual speckle for the fabrication of 1D and 2D micron and sub-micron size random gratings. These random gratings exhibit broadband response with interesting diffusive diffraction patterns. As an immediate application for solar energy harvesting, significant reduction in transmission and enhanced absorption in thin "Si-random grating-Si" sandwich structure is demonstrated. This work has multifaceted significance where we exploited the individual speckle diffraction properties for the first time. Besides the solar harvesting applications, random gratings are suitable structures for fabrication of theoretically proposed random quantum well IR detectors and hence expected that this work will augur well for such studies in the near future.
ISSN:2045-2322
DOI:10.1038/srep20501