Nonlinear Optical Effects with Polariton Lasers in a GaAs Microcavity

Abstract

We report the nonlinear optical properties of polaritons in a single quantum well GaAs microcavity. Single and double resonance cavities have been used to enhance the nonlinear effect of a nonlinear medium in high-Q quality factor cavities due to the cavity field amplification. On the other hand, such a cavity can generate polaritons, which condense (Bose− Einstein condensation) for determined conditions, such as cavity detuning and polariton density. Here, we present experimental observations of the second harmonic generation from polaritons in a GaAs microcavity, which exhibit a 2 order higher efficiency than those from the usual method. Furthermore, the efficiency is particularly high when the polariton is a photon-like particle and in a condensed state.

Second Harmonic Generation from a Single Plasmonic Nanorod Strongly Coupled to a WSe2 Monolayer

“…Nonlinear signal generation in the strongly coupled regime has been studied using various platforms. For example, previous studies have focused on second harmonic generation (SHG) from excitons coupled to GaAs microcavities, , and third harmonic generation (THG) enhancement has been observed from polymethine dye-microcavity coupled systems . Furthermore, SHG enhancement from WS 2 –Ag nanocavity systems has been reported in the weak-coupling regime .…”

Virtual Issue on Polaritons in Physical Chemistry

“…7 Nonlinear measurements have also been performed in optical cavities. For example, Pimenta et al observed second harmonic generation from a GaAs quantum-well microcavity 12 and found a two orders of magnitude higher nonlinear response when the GaAs nanostructures are coupled to cavity modes to create polaritons.…”

Population of Subradiant States in Carbon Nanotube Microcavities in the Ultrastrong Light–Matter Coupling Regime

“…Polaritons have attracted much scientific interest due to both their interesting properties and potential uses. They can have small effective masses (∼10 –5 m e ) and are spatially delocalized. − The small effective masses allow for the possibility of room-temperature Bose–Einstein condensation, and the spatial delocalization across the thickness of the microcavity has been leveraged to enable efficient excitation energy transfer through an insulating barrier that would be inefficient in the absence of strong light–matter hybridization. − Polariton phenomena can be exploited to enable low-threshold lasing and optical bistability. − In principle, the subradiant polariton states can also delocalize in space and play a key role in condensation because they act as a reservoir that can populate the LP.…”