• Corpus ID: 248505973

Ultrafast imaging of coherent polariton propagation and interactions

  title={Ultrafast imaging of coherent polariton propagation and interactions},
  author={Ding Xu and Arkajit Mandal and J M Baxter and Shangjun Cheng and In-Ho Lee and Haowen Su and Song Liu and David R. Reichman and Milan Delor},
Semiconductor excitations can hybridize with cavity photons to form exciton-polaritons (EPs) with remarkable properties, including light-like energy flow combined with matter-like interactions. To fully harness these properties, EPs must maintain long-range coherence despite exciton-mediated interactions with lattice phonons. To address this open question, we develop a nonlinear momentum-resolved optical approach that images EPs in real space on femtosecond scales. We directly visualize EP… 

Figures from this paper


Microscopic modeling of exciton-polariton diffusion coefficients in atomically thin semiconductors
In the strong light-matter coupling regime realized e.g. by integrating semiconductors into optical microcavities, polaritons as new hybrid light-matter quasi-particles are formed. The corresponding
Single-photon nonlinearity at room temperature.
Stable excitons dressed with high-energy molecular vibrations are utilized, allowing for single-photon nonlinear operation at ambient conditions, and opens new horizons for practical implementations like sub-picosecond switching, amplification and all-optical logic at the fundamental quantum limit.
Perovskite semiconductors for room-temperature exciton-polaritonics
Fundamental aspects of perovskite semiconductors for exciton-polaritons are discussed and the recent rapid experimental advances using lead-halides for room-temperature polaritonics are reviewed, including the experimental realization of strong light–matter interaction using various types of microcavities as well as reaching the polariton condensation regime in planar microc Cavities and lattices.
Microcavity-Like Exciton-Polaritons can be the Primary Photoexcitation in Bare Organic Semiconductors
Exciton-polaritons (EPs) are quasiparticles formed by the hybridization of excitons with light modes. As organic semiconductors sustain stable excitons at room-temperature, these materials are
Motional narrowing, ballistic transport, and trapping of room-temperature exciton polaritons in an atomically-thin semiconductor
This work creates a non-trivial potential landscape for polaritons in monolayer WS2, and demonstrates their trapping and ballistic propagation across tens of micrometers, and shows that the effects of dielectric disorder are dramatically reduced, leading to motional narrowing and preserved partial coherence.
Multi-scale dynamics simulations of molecular polaritons: The effect of multiple cavity modes on polariton relaxation.
The results of the simulations suggest that after resonant excitation into the upper polariton at a fixed wave vector, or incidence angle, the coupled cavity-molecule system rapidly decays into dark states that lack dispersion, and it is anticipated that the more realistic cavity description in this approach will help to better understand and predict how cavities can modify molecular properties.
Observation of bright polariton solitons in a semiconductor microcavity
Microcavity polaritons are composite half-light half-matter quasiparticles, which have recently been demonstrated to exhibit rich physical properties, such as nonequilibrium condensation, parametric
Determination of Dielectric Functions and Exciton Oscillator Strength of Two-Dimensional Hybrid Perovskites
Two-dimensional (2D) hybrid organic inorganic perovskite (HOIP) semiconductors have attracted widespread attention as a platform of next generation optoelectronic devices benefiting from their
Ultralong‐Range Energy Transport in a Disordered Organic Semiconductor at Room Temperature Via Coherent Exciton‐Polariton Propagation
The ultrastrong coupling of a Bloch surface wave photon and molecular excitons in a disordered organic thin film at room temperature is demonstrated, where the major fraction of the polaritons are propagating states.