A5014070503- Strong Light-Matter Interactions
- Quantum Electrodynamics and Casimir Effect
- Nonlinear Photonic Systems
- Neural Networks and Reservoir Computing
- Mechanical and Optical Resonators
- Quantum optics and atomic interactions
- Thermal Radiation and Cooling Technologies
- Nonlinear Dynamics and Pattern Formation
- Plasmonic and Surface Plasmon Research
- Random lasers and scattering media
- Cold Atom Physics and Bose-Einstein Condensates
- Photonic and Optical Devices
- Perovskite Materials and Applications
- Spectroscopy and Quantum Chemical Studies
- stochastic dynamics and bifurcation
Institute for Atomic and Molecular Physics
2020-2024
We report the first observation of non-Markovian stochastic resonance, i.e., noise-assisted amplification a periodic signal in system with memory. Our is an oil-filled optical microcavity which, driven by continuous wave laser, has memory its nonlinear response. By modulating cavity length while adding noise to driving we observe peak transmitted signal-to-noise ratio as function variance. experimental observations are reproduced numerical simulations, which further reveal that resonance...
We investigate, experimentally and theoretically, the dynamics of a laser-driven cavity with noninstantaneous effective photon-photon interactions. Scanning laser-cavity frequency detuning at different speeds across an optical bistability, we find hysteresis area that is nonmonotonic function speed. In limit fast scans comparable to memory time interactions, demonstrate decays following universal power law scaling exponent -1. further regime non-Markovian emerging from white noise. This...
Fano resonances and Rabi splittings are routinely reported in the scientific literature. Asymmetric resonance lineshapes usually associated with resonances, two split peaks spectrum often attributed to a splitting. True unequivocal signatures of coherent coupling between subsystems. However, can same spectral characterizing arise from purely incoherent sum intensities? Here we answer this question through experiments tunable Fabry-Pérot cavity containing CsPbBr3 perovskite crystal. By...
Superfluidity—frictionless flow—has been observed in various physical systems such as liquid helium, cold atoms, and exciton polaritons. Superfluidity is usually realized by cooling suppressing all dissipation. Here we challenge this paradigm demonstrating signatures of superfluidity, enabled dissipation, the flow light within a room-temperature oil-filled cavity. Dissipation oil mediates effective photon-photon interactions which are noninstantaneous nonlocal. Such were expected to severely...
Halide perovskites have emerged as promising photonic materials for fundamental physics studies and technological applications. Their potential nonlinear optics has also drawn great interest recently; yet, to date, continuous-wave (CW) nonlinearities remained elusive. Here we demonstrate CW phenomena in a CsPbBr$_3$ perovskite cavity. We first optical bistability -- the hallmark of single-mode coherent optics. Next exploit interplay nonlinearity birefringence control over polarization light....
We demonstrate spontaneous symmetry breaking in the diffraction of a laser-driven grating with memory its nonlinear response. observe, experimentally and theoretically, asymmetric even when illumination are symmetric. Our analysis reveals how diffracted waves can spontaneously acquire momentum parallel to lattice vector quantities unconstrained by period. findings point numerous opportunities for imaging, sensing, information processing periodic systems, which leverage much richer...
Light in a nonlinear cavity is expected to flow without friction -- like superfluid under certain conditions. Until now, part-light part-matter (i.e., polariton) superfluids have been observed either at liquid helium temperatures steady state, or room temperature for sub-picosecond timescales. Here we report signatures of photons (not polaritons) the first time. When launching photon fluid against defect, observe suppression backscattering above critical intensity and below velocity....
The connection between symmetries and conservation laws is a cornerstone of physics. It underlies Bloch's theorem which explains wave phenomena in all linear periodic systems. Here we demonstrate that, nonlinear grating with memory, diffracted waves can spontaneously acquire momentum parallel to the lattice vector quantities unconstrained by period. In this breakdown theorem, also evidence solutions Maxwell's equations, amplitudes no longer respect discrete translation symmetry grating. Our...
Fano resonances and Rabi splittings are routinely reported in the scientific literature. Asymmetric resonance lineshapes usually associated with resonances, two split peaks spectrum often attributed to a splitting. True unequivocal signatures of coherent coupling between subsystems. However, can same spectral characterizing arise from purely incoherent sum intensities? Here we answer this question through experiments tunable Fabry-P\'erot cavity containing CsPbBr\textsubscript{3} perovskite...