Publications (17)
Spatial distribution of an optically induced excitonic reservoir below exciton-polariton condensation threshold
M. Boozarjmehr, M. Steger, K. West +5
Optical trapping and manipulation of microcavity exciton polaritons rely on effective potentials induced by the interaction of polaritons with a reservoir of high energy excitonic…
Superlinear Increase of Photocurrent due to Stimulated Scattering into a Polariton Condensate
D. Myers, B. Ozden, M. Steger +5
We show that when a monopolar current is passed through an n-i-n structure, superlinear photocurrent response occurs when there is a polariton condensate. This is in sharp contrast…
Coherence of a non-equilibrium polariton condensate across the interaction-mediated phase transition
P. Comaron, E. Estrecho, M. Wurdack +9
The emergence of spatial coherence in a confined two-dimensional Bose gas of exciton-polaritons with tuneable interactions offers a unique opportunity to explore the role of intera…
Collective excitations of exciton-polariton condensates in a synthetic gauge field
D. BiegaÅska, M. Pieczarka, E. Estrecho +7
Collective (elementary) excitations of quantum bosonic condensates, including condensates of exciton polaritons in semiconductor microcavities, are a sensitive probe of interpartic…
Topological phase transition in an all-optical exciton-polariton lattice
M. Pieczarka, E. Estrecho, S. Ghosh +8
Topological insulators are a class of electronic materials exhibiting robust edge states immune to perturbations and disorder. This concept has been successfully adapted in photoni…
Hyperfine structure and nuclear hyperpolarization observed in the bound exciton luminescence of Bi donors in natural Si
T. Sekiguchi, M. Steger, K. Saeedi +4
As the deepest group V donor in Si, Bi has by far the largest hyperfine interaction, and also a large I=9/2 nuclear spin. At zero field this splits the donor ground state into stat…
Spontaneous condensation of exciton polaritons in the single-shot regime
E. Estrecho, T. Gao, N. Bobrovska +9
Bose-Einstein condensate of exciton polaritons in a semiconductor microcavity is a macroscopically populated coherent quantum state subject to concurrent pumping and decay. Debates…
Polariton-Enhanced Exciton Transport
D. M. Myers, S. Mukherjee, J. Beaumariage +4
The transport distance of excitons in exciton-polariton systems has previously been assumed to be very small (m). The sharp spatial profiles observed when generating…
Effect of optically-induced potential on the energy of trapped exciton-polaritons below the condensation threshold
M. Pieczarka, M. Boozarjmehr, E. Estrecho +8
Exciton-polaritons (polaritons herein) offer a unique nonlinear platform for studies of collective macroscopic quantum phenomena in a solid state system. Shaping of polariton flow…
Dynamics of spin polarization in tilted polariton rings
S. Mukherjee, V. K. Kozin, A. V. Nalitov +9
We have observed the effect of pseudo magnetic field originating from the polaritonic analog of spin-orbit coupling (TETM splitting) on a polariton condensate in a ring-shaped m…
Optically detected NMR of optically hyperpolarized 31P neutral donors in 28Si
M. Steger, T. Sekiguchi, A. Yang +8
The electron and nuclear spins of the shallow donor 31P are promising qubit candidates invoked in many proposed Si-based quantum computing schemes. We have recently shown that the…
Reanalysis of experimental determinations of polariton-polariton interactions in microcavities
D. W. Snoke, V. Hartwell, J. Beaumariage +7
The polariton-polariton interaction strength is an important parameter for all kinds of applications using the nonlinear properties of polaritons, such as optical switching and sin…
Simultaneous sub-second hyperpolarization of the nuclear and electron spins of phosphorus in silicon
A. Yang, M. Steger, T. Sekiguchi +7
We demonstrate a method which can hyperpolarize both the electron and nuclear spins of 31P donors in Si at low field, where both would be essentially unpolarized in equilibrium. It…
Observation of Non-equilibrium Motion and Equilibration in Polariton Rings
S. Mukherjee, D. M. Myers, R. G. Lena +8
We present a study of the macroscopic dynamics of a polariton condensate formed by non-resonant optical excitation in a quasi-one-dimensional ring-shaped microcavity. The presence…
Chiral modes at exceptional points in exciton-polariton quantum fluids
T. Gao, G. Li, E. Estrecho +10
We demonstrate generation of chiral modes -- vortex flows with fixed handedness in exciton-polariton quantum fluids. The chiral modes arise in the vicinity of exceptional points (n…
Low-energy collective oscillations and Bogoliubov sound in an exciton-polariton condensate
E. Estrecho, M. Pieczarka, M. Wurdack +6
We report the observation of low-energy, low-momenta collective oscillations of an excitonpolariton condensate in a round "box" trap. The oscillations are dominated by the dipole a…
Direct measurement of polariton-polariton interaction strength in the Thomas-Fermi regime of exciton-polariton condensation
E. Estrecho, T. Gao, N. Bobrovska +12
Bosonic condensates of exciton polaritons (light-matter quasiparticles in a semiconductor) provide a solid-state platform for studies of non-equilibrium quantum systems with a spon…