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.
Originalsprache | englisch |
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Titel | Proceedings of SPIE - The International Society for Optical Engineering |
Herausgeber (Verlag) | SPIE |
Band | 9556 |
ISBN (Print) | 9781628417227 |
DOIs | |
Publikationsstatus | Veröffentlicht - 2015 |
Veranstaltung | Nanoengineering: Fabrication, Properties, Optics, and Devices XII - San Diego, USA / Vereinigte Staaten Dauer: 11 Aug. 2015 → 12 Aug. 2015 |
Konferenz
Konferenz | Nanoengineering: Fabrication, Properties, Optics, and Devices XII |
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Land/Gebiet | USA / Vereinigte Staaten |
Ort | San Diego |
Zeitraum | 11/08/15 → 12/08/15 |
ASJC Scopus subject areas
- Angewandte Mathematik
- Angewandte Informatik
- Elektrotechnik und Elektronik
- Elektronische, optische und magnetische Materialien
- Physik der kondensierten Materie