Purcell Effect For Active Tuning Of Light Scattering From Semiconductor Optical Antennas

Abstract

Subwavelength, high-refractive index semiconductor nanostructures support optical resonances that endow them with valuable antenna functions. Control over the intrinsic properties, including their complex refractive index, size, and geometry, has been used to manipulate fundamental light absorption, scattering, and emission processes in nanostructured optoelectronic devices. In this study, we harness the electric and magnetic resonances of such antennas to achieve a very strong dependence of the optical properties on the external environment. Specifically, we illustrate how the resonant scattering wavelength of single silicon nanowires is tunable across the entire visible spectrum by simply moving the height of the nanowires above a metallic mirror. We apply this concept by using a nanoelectromechanical platform to demonstrate active tuning.

Publication Date

12-15-2017

Publication Title

Science

Volume

358

Issue

6369

Number of Pages

1407-1410

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1126/science.aao5371

Socpus ID

85040202287 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85040202287

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