Edge Trapping of Exciton-Polariton Condensates in Etched Pillars

Abstract

In this letter, we present a study of the condensation of exciton-polaritons in large etched pillar structures that exhibit shallow edge trapping. The $\approx$ 100 $\mu$m $\times$ 100 $\mu$m pillars were fabricated using photolithography and a BCl${}_3$/Cl${}_2$ reactive ion etch. A low energy region emerged along the etched edge, with the minima $\approx$ 7 $\mu$m from the outer edge. The depth of the trap was 0.5-1.5 meV relative to the level central region, with the deepest trapping at the corners. We were able to produce a Bose-Einstein condensate in the trap near the edges and corners by pumping non-resonantly in the middle of the pillar. This condensate began as a set of disconnected condensates at various points along the edges, but then became a single mono-energetic condensate as the polariton density was increased. Similar edge traps could be used to produce shallow 1D traps along edges or other more complex traps using various etch geometries and scales.

arXiv comment5 pages, 7 figures. To be published in Applied Physics Letters. Replaced preprint with the accepted manuscript

References in corpus (16)

• Spontaneous formation and optical manipulation of extended polariton condensates
• Direct observation of Dirac cones and a flatband in a honeycomb lattice for polaritons
• Polariton laser using single micropillar GaAs-GaAlAs semiconductor cavities
• Sculpting oscillators with light within a nonlinear quantum fluid
• Bose-Einstein Condensation of Long-Lifetime Polaritons in Thermal Equilibrium
• Polariton quantum boxes in semiconductor microcavities
• Engineering the spatial confinement of exciton-polaritons in semiconductors
• Polariton Condensation in an optically induced 2D potentia
• Zero Dimensional Polariton Laser in a Sub-Wavelength Grating Based Vertical Microcavity
• Actively Tuned and Spatially Trapped Polaritons
• Long Range Ballistic Motion and Coherent Flow of Long Lifetime Polaritons
• Slow reflection and two-photon generation of microcavity exciton-polaritons
• Spin-Flipping Half Vortex in a Macroscopic Polariton Spinor Ring Condensate
• Dynamics of a polariton condensate transistor switch
• Robust platform for engineering pure-quantum-state transitions in polariton condensates
• Energy relaxation of exciton-polariton condensates in quasi-1D microcavities

Cited by in corpus (7)

• Polariton-Enhanced Exciton Transport
• Zitterbewegung of exciton-polaritons
• Observation of Non-equilibrium Motion and Equilibration in Polariton Rings
• Superlinear Increase of Photocurrent due to Stimulated Scattering into a Polariton Condensate
• Dynamics of spin polarization in tilted polariton rings
• Persistent polarization oscillations in ring-shape polariton condensates
• Persistent, controllable circulation of a polariton ring condensate