Abstract
Abstract Historically, nanophotonics deals with a control of light at the nanoscale being closely connected with the rapid advances in plasmonics – the physics of surface plasmon polaritons supported by metal–dielectric interfaces. Properly engineered nanostructures allow the subwavelength propagation of light and its strong confinement in nanowaveguides and nanocavities, making possible the field enhancement and lasing. Spaser was suggested as a special type of nanolaser with a very small footprint that can be modulated quickly thus becoming a good candidate for on-chip optical data processing. However, recent developments in the physics of high-index dielectric nanoparticles and resonant dielectric metasurfaces allowed to advance the field of nanophotonics and introduce novel nonplasmonic nanostructures and nanolasers empowered by topology and interference effects. Here we present first some examples of experimentally realized spasers, and then discuss the recent developments in the cutting-edge high-index dielectric nanostructures employed for nonplasmonic nanolasers based on Mie resonances, anapole states, bound states in the continuum, and the physics of topological phases.
Highlights
In 2003, Bergman and Stockman [1] introduced a novel theoretical concept of surface plasmon amplification by Despite spasers help to reduce radiative losses and sizes of optical devices, they introduce parasitic Ohmic losses originating from their metallic parts
Historically, nanophotonics deals with a control of light at the nanoscale being closely connected with the rapid advances in plasmonics – the physics of surface plasmon polaritons supported by metal–dielectric interfaces
Recent developments in the physics of high-index dielectric nanoparticles and resonant dielectric metasurfaces allowed to advance the field of nanophotonics and introduce novel nonplasmonic nanostructures and nanolasers empowered by topology and interference effects
Summary
In 2003, Bergman and Stockman [1] introduced a novel theoretical concept of surface plasmon amplification by. Purely semiconductorbased lasers using photonic band gap or whispering gallery modes, in photonic crystal or microdisk cavities, respectively, have been widely studied [5, 7, 8] These attempts resulted in nanolasers that were comparable to, or even smaller than, the operating wavelength. The new concepts of bound states in the continuum and topological phases allow employing multimode interference effects for creating lasers with superior characteristics, small footprints, and even lower lasing thresholds In this perspective, we provide some examples of plasmonic nanolasers, and discuss the recent developments in the study of cutting-edge nanostructures employed for nonplasmonic nanolasers based on Mie resonances, anapole states, bound states in the continuum, and the recently emerged novel physics of topological phases
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
