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Time-Resolved FDTD ...
Time-Resolved FDTD and Experimental FTIR Study of Gold Micropatch Arrays for Wavelength-Selective Mid-Infrared Optical Coupling
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- Fu, Ying, 1964- (författare)
- Högskolan i Halmstad,Halmstad Embedded and Intelligent Systems Research (EIS)
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- Yager, Tom (författare)
- Institute of Solid State Physics, University of Latvia, Riga, Latvia
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- Chikvaidze, George (författare)
- Institute of Solid State Physics, University of Latvia, Riga, Latvia
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- Iyer, Srinivasan (författare)
- Senseair AB, Delsbo, Sweden
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- Wang, Qin (författare)
- RISE,Smart hårdvara,RISE Research Institutes of Sweden AB, Kista, Sweden
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(creator_code:org_t)
- 2021-07-31
- 2021
- Engelska.
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Ingår i: Sensors. - Basel : MDPI. - 1424-8220. ; 21:15
- Relaterad länk:
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https://doi.org/10.3...
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https://www.mdpi.com...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Infrared radiation reflection and transmission of a single layer of gold micropatch two-dimensional arrays, of patch length ∼1.0μm and width ∼0.2μm, have been carefully studied by a finite-difference time-domain (FDTD) method, and Fourier-transform infrared spectroscopy (FTIR). Through precision design of the micropatch array structure geometry, we achieve a significantly enhanced reflectance (85%), a substantial diffraction (10%), and a much reduced transmittance (5%) for an array of only 15% surface metal coverage. This results in an efficient far-field optical coupling with promising practical implications for efficient mid-infrared photodetectors. Most importantly we find that the propagating electromagnetic fields are transiently concentrated around the gold micropatch array in a time duration of tens of ns, providing us with a novel efficient near-field optical coupling.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- FDTD
- FTIR
- metal micropatch arrays
- near field optics
- far field optics
- nano fabrication
- electron beam lithography
- infrared sensing
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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