In this contribution, we show how it is possible to exploit the exotic response of arrays of plasmonic nanoparticles (NPs) to design ultra-thin optical absorbers and color filters. First, it is shown that an array of electrically small spheroidal NPs may be effectively characterized using a complex-valued surface impedance tensor. Then, the model is exploited to design optical Salisbury-like screens able to absorb all the impinging light within a desired frequencies range. Finally, an innovative nanoscale color filter able to selectively absorb the light in a narrow frequencies band while being transparent in the rest of the IR and optical spectrum is proposed.
Monti, A., Alu, A., Toscano, A., Bilotti, F. (2018). Optical absorbers with NPs-based lossy metasurfaces. In 2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 - Proceedings (pp.2075-2076). 345 E 47TH ST, NEW YORK, NY 10017 USA : IEEE.
Optical absorbers with NPs-based lossy metasurfaces
Monti, A
Writing – Original Draft Preparation
;Alu, AMembro del Collaboration Group
;Toscano, ASupervision
;Bilotti, FSupervision
2018-01-01
Abstract
In this contribution, we show how it is possible to exploit the exotic response of arrays of plasmonic nanoparticles (NPs) to design ultra-thin optical absorbers and color filters. First, it is shown that an array of electrically small spheroidal NPs may be effectively characterized using a complex-valued surface impedance tensor. Then, the model is exploited to design optical Salisbury-like screens able to absorb all the impinging light within a desired frequencies range. Finally, an innovative nanoscale color filter able to selectively absorb the light in a narrow frequencies band while being transparent in the rest of the IR and optical spectrum is proposed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
