Platform for Electrically Pumped Polariton Simulators and Topological Lasers

Abstract

Two-dimensional electronic materials such as graphene and transition metal dichalgenides feature unique electrical and optical properties due to the conspirative effect of band structure, orbital coupling, and crystal symmetry. Synthetic matter, as accomplished by artificial lattice arrangements of cold atoms, molecules, electron patterning, and optical cavities, has emerged to provide manifold intriguing frameworks to likewise realize such scenarios. Exciton-polaritons have recently been added to the list of promising candidates for the emulation of system Hamiltonians on a semiconductor platform, offering versatile tools to engineer the potential landscape and to access the non-linear electro-optical regime. In this work, we introduce an electronically driven square and honeycomb lattice of exciton-polaritons, paving the way towards real world devices based on polariton lattices for on-chip applications. Our platform exhibits laser-like emission from high-symmetry points under direct current injection, hinting at the prospect of electrically driven polariton lasers with possibly topologically non-trivial properties.

Impact of the Energetic Landscape on Polariton Condensates' Propagation along a Coupler

“…[ 7 ] Moreover, during the last decade, a unique control over the realization and manipulation of polariton lattices has been attained and several experimental demonstrations of the so‐called photonic graphene have been published. In the early ones, only the linearity of the polariton dispersion around K and K' points of the reciprocal space was proven under optical [ 8 ] and electrical injection, [ 9 ] while in the later ones, the evidence of topological states in this kind of lattices have been demonstrated. [ 10 ]…”

Spontaneous coherence in spatially extended photonic systems: Non-Equilibrium Bose-Einstein condensation

“…Room temperature operation was first demonstrated in GaN based cavities [127,128], then in ZnO [129,130], organic materials [131,132], luminescent proteins [133] and perovskites [134,135]. Realizing an electrically pumped polariton laser operating at room temperature is still a challenging open problem that is attracting a strong in-terest [136][137][138][139][140][141]. Another frontier is to observe BEC of polaritons emerging from the strong coupling between light and intersubband transitions in doped quantum wells [142][143][144].…”

Mode-Locked Topological Insulator Laser Utilizing Synthetic Dimensions

“…More recently, these concepts of topological insulator laser have led to topological crystalline bulk lasers [40] and to electrically pumped topological Valley-Hall quantum cascade laser systems [41]. These concepts offer many new research directions, ranging from new designs for masers [42], phonon lasers [43], spacers [44][45][46], and lasing action in the recently discovered exciton-polariton topological insulators [47,48].…”