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Fano-resonant ultrathin film optical coatings
- Source :
- Nature Nanotechnology. 16:440-446
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- Optical coatings are integral components of virtually every optical instrument. However, despite being a century-old technology, there are only a handful of optical coating types. Here, we introduce a type of optical coatings that exhibit photonic Fano resonance, or a Fano-resonant optical coating (FROC). We expand the coupled mechanical oscillator description of Fano resonance to thin-film nanocavities. Using FROCs with thicknesses in the order of 300 nm, we experimentally obtained narrowband reflection akin to low-index-contrast dielectric Bragg mirrors and achieved control over the reflection iridescence. We observed that semi-transparent FROCs can transmit and reflect the same colour as a beam splitter filter, a property that cannot be realized through conventional optical coatings. Finally, FROCs can spectrally and spatially separate the thermal and photovoltaic bands of the solar spectrum, presenting a possible solution to the dispatchability problem in photovoltaics, that is, the inability to dispatch solar energy on demand. Our solar thermal device exhibited power generation of up to 50% and low photovoltaic cell temperatures (~30 °C), which could lead to a six-fold increase in the photovoltaic cell lifetime. A thin-film optical coating exhibits Fano resonance showing promising applications in structural colouring of transparent objects and hybrid thermal and photovoltaic power generation.
- Subjects :
- Materials science
Optical instrument
Biomedical Engineering
Physics::Optics
Bioengineering
02 engineering and technology
010402 general chemistry
01 natural sciences
law.invention
law
Photovoltaics
General Materials Science
Electrical and Electronic Engineering
business.industry
Photovoltaic system
Fano resonance
021001 nanoscience & nanotechnology
Condensed Matter Physics
Solar energy
Atomic and Molecular Physics, and Optics
0104 chemical sciences
Optical coating
Optoelectronics
Photonics
0210 nano-technology
business
Beam splitter
Subjects
Details
- ISSN :
- 17483395 and 17483387
- Volume :
- 16
- Database :
- OpenAIRE
- Journal :
- Nature Nanotechnology
- Accession number :
- edsair.doi...........6955fd16786847114e5f009eac966fcc