NDLI: Alternative Model of a Subwavelength Diffractive Lens Proposed for PV Cells Applications

Content Provider	IEEE Xplore Digital Library
Author	Albarazanchi, A. Gerard, P. Ambs, P. Meyrueis, P.
Copyright Year	1989
Abstract	Recently, several approaches have been proposed to concentrate and to separate spectrum bands of sunlight using a planar design. Fresnel lenses are widely used in concentrating photovoltaic systems, to achieve the concentration of sunlight onto the surface of solar cells. A diffractive lens superimposed with a grating, in a single integrated optical device, has been proposed to obtain the sunlight spectrum splitting and beam concentration (SSBC) simultaneously. Here, we present an alternative approach to achieve SSBC functionality using only a diffractive lens. Because of the subwavelength structures used, a high efficiency for a broadband light spectrum is demonstrated through simulations. We propose a theoretical model for a subwavelength diffractive lens (SWDL), which has been elaborated with optimal parameters. The model proposed is suitable to be used for low concentration (1-10×) PV cell systems. The optical efficiency obtained is ~70% after separating apart of the sunlight spectrum (400-1100) nm into two bands (400-800) and (800-1100) nm. A new electromagnetic modeling tool based on a hybrid finite difference time domain angular spectrum method propagator has been used to analyze the performance of the proposed model. The proposed SWDL achieves the functionality of an SSBC over a small distance and can be integrated into a compact PV cells system.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	1317
Ending Page	1320
Page Count	4
File Size	805763
File Format	PDF
ISSN	10411135
Volume Number	27
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-15
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lenses Optical diffraction Optical device fabrication Diffraction Gratings Optical refraction Propagating methods Diffractive lens Subwavelength structures Nonimaging optics PV cells applications propagating methods subwavelength structures nonimaging optics
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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