Optimizing a sub-wavelength grating lens for large incidence angles

Lukas Elsinger; Peter Hadley; Rainer Minixhofer; Anderson Singulani

doi:10.1117/12.2187784

Optimizing a sub-wavelength grating lens for large incidence angles

Lukas Elsinger^*, Peter Hadley, Rainer Minixhofer, Anderson Singulani

^*Corresponding author for this work

Institute of Solid State Physics (5130)

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Abstract

Flat transmissive lens designs for infrared sensor applications based on sub-wavelength gratings were analyzed using a finite difference time domain program (Lumerical). An initial design for broadband transmission with a design wavelength of 4μm exhibited a drop in the transmittance for large incidence angles that caused defocusing. This was investigated numerically and a phenomenological explanation is presented. The sub- wavelength structure was then optimized to work also for large incidence angles. The focal spot of the proposed lens was characterized using a finite element method package (Comsol). Downloading of the abstract is permitted for personal use only.

Original language	English
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Publisher	SPIE
Volume	9556
ISBN (Print)	9781628417227
DOIs	https://doi.org/10.1117/12.2187784
Publication status	Published - 2015
Event	Nanoengineering: Fabrication, Properties, Optics, and Devices XII - San Diego, United States Duration: 11 Aug 2015 → 12 Aug 2015

Conference

Conference	Nanoengineering: Fabrication, Properties, Optics, and Devices XII
Country/Territory	United States
City	San Diego
Period	11/08/15 → 12/08/15

Keywords

IR Imaging
Sub-wavelength Grating Lens

ASJC Scopus subject areas

Applied Mathematics
Computer Science Applications
Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1117/12.2187784

Cite this

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title = "Optimizing a sub-wavelength grating lens for large incidence angles",

abstract = "Flat transmissive lens designs for infrared sensor applications based on sub-wavelength gratings were analyzed using a finite difference time domain program (Lumerical). An initial design for broadband transmission with a design wavelength of 4μm exhibited a drop in the transmittance for large incidence angles that caused defocusing. This was investigated numerically and a phenomenological explanation is presented. The sub- wavelength structure was then optimized to work also for large incidence angles. The focal spot of the proposed lens was characterized using a finite element method package (Comsol). Downloading of the abstract is permitted for personal use only.",

keywords = "IR Imaging, Sub-wavelength Grating Lens",

author = "Lukas Elsinger and Peter Hadley and Rainer Minixhofer and Anderson Singulani",

year = "2015",

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language = "English",

isbn = "9781628417227",

volume = "9556",

booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

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T1 - Optimizing a sub-wavelength grating lens for large incidence angles

AU - Elsinger, Lukas

AU - Hadley, Peter

AU - Minixhofer, Rainer

AU - Singulani, Anderson

PY - 2015

Y1 - 2015

N2 - Flat transmissive lens designs for infrared sensor applications based on sub-wavelength gratings were analyzed using a finite difference time domain program (Lumerical). An initial design for broadband transmission with a design wavelength of 4μm exhibited a drop in the transmittance for large incidence angles that caused defocusing. This was investigated numerically and a phenomenological explanation is presented. The sub- wavelength structure was then optimized to work also for large incidence angles. The focal spot of the proposed lens was characterized using a finite element method package (Comsol). Downloading of the abstract is permitted for personal use only.

AB - Flat transmissive lens designs for infrared sensor applications based on sub-wavelength gratings were analyzed using a finite difference time domain program (Lumerical). An initial design for broadband transmission with a design wavelength of 4μm exhibited a drop in the transmittance for large incidence angles that caused defocusing. This was investigated numerically and a phenomenological explanation is presented. The sub- wavelength structure was then optimized to work also for large incidence angles. The focal spot of the proposed lens was characterized using a finite element method package (Comsol). Downloading of the abstract is permitted for personal use only.

KW - IR Imaging

KW - Sub-wavelength Grating Lens

UR - http://www.scopus.com/inward/record.url?scp=84951823667&partnerID=8YFLogxK

U2 - 10.1117/12.2187784

DO - 10.1117/12.2187784

M3 - Conference paper

AN - SCOPUS:84951823667

SN - 9781628417227

VL - 9556

BT - Proceedings of SPIE - The International Society for Optical Engineering

PB - SPIE

T2 - Nanoengineering: Fabrication, Properties, Optics, and Devices XII

Y2 - 11 August 2015 through 12 August 2015

ER -

Optimizing a sub-wavelength grating lens for large incidence angles

Abstract

Conference

Keywords

ASJC Scopus subject areas

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