Scattering engineering at the extreme with complex media (Conference Presentation)

Francesco Monticone

doi:10.1117/12.2528531

9 September 2019 Scattering engineering at the extreme with complex media (Conference Presentation)

Francesco Monticone

Proceedings Volume 11081, Active Photonic Platforms XI; 110810C (2019) https://doi.org/10.1117/12.2528531
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

The ability to control the optical scattering response of a material body is of crucial importance in different scientific areas and practical applications, spanning from light trapping for solar cells, to optical tweezers, near-field optical imaging, advanced meta-lenses, etc. In this talk, we review our recent efforts on engineering the optical scattering response at the extreme using complex material platforms and engineered nanostructures. We focus on three main topics in this exciting area. (a) We review some useful physical bounds on scattering and absorption imposed by causality and passivity, and discuss our recent investigation on broadband invisibility and absorption enhancement, with particular focus on the associated limits and the stability issues in the case of active media; we also elucidate the differences and similarities between invisible objects (cloaked objects and anapolar scatterers) and scatterers supporting nonradiating eigenmodes, or bound states in the continuum. (b) As an example of useful application of scattering suppression, we discuss the design of invisible near-field probes for scanning optical microscopy, realized by engineering their impedance at the nanoscale; we also discuss their experimental demonstration at infrared frequencies. (c) Finally, we demonstrate the potential of novel nonreciprocal and topological media to enable even more extreme scattering effects, for example ultra-low-frequency and shape-independent scattering resonances.

Conference Presentation

Citation Download Citation

Francesco Monticone "Scattering engineering at the extreme with complex media (Conference Presentation)", Proc. SPIE 11081, Active Photonic Platforms XI, 110810C (9 September 2019); https://doi.org/10.1117/12.2528531

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KEYWORDS

Scattering

Light scattering

Absorption

Near field optics

Near field scanning optical microscopy

Near field

Optical engineering

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