Active dielectric nanoantennas and metasurfaces (Conference Presentation)

Abstract

Dielectric nanoantennas and metasurfaces have recently emerged as a new nanophotonic platform complimenting conventional plasmonics for light control at the nanoscale [1]. Due to their low losses, wide range of available electric and magnetic resonances and compatibility with conventional nanofabrication processes they provide a unique toolkit to achieve new functionalities and build highly-efficient nanophotonic devices. So far however, most of the demonstrated functionalities have been limited to passive light control while emission properties of the nanoantennas have rarely been studied. In this talk, I will review our recent research in the direction of light emitting semiconductor nanoantennas and metasurfaces. In particular I will show our first experimental demonstration of lasing action in active semiconductor 2D nanoantenna arrays based on bound state in the continuum [2]. I will also show how lasing can be achieved in 1D nanoantenna chains and even single nanoantennas using interference effects between different resonant modes. These results expand the toolkit of dielectric nanoantennas towards active functionalities providing a new platform for making chip-scale directional laser devices.