A5039776049- Strong Light-Matter Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Mechanical and Optical Resonators
- Quantum Electrodynamics and Casimir Effect
- Quantum and electron transport phenomena
- Quantum optics and atomic interactions
- Quantum Information and Cryptography
- Thermal Radiation and Cooling Technologies
- Quantum, superfluid, helium dynamics
- Topological Materials and Phenomena
- Photonic and Optical Devices
- Atomic and Subatomic Physics Research
- Advanced Fiber Laser Technologies
- Advanced Thermodynamics and Statistical Mechanics
- Plasmonic and Surface Plasmon Research
- Nonlinear Photonic Systems
- Semiconductor Quantum Structures and Devices
- Physics of Superconductivity and Magnetism
- Quantum many-body systems
- Photonic Crystals and Applications
- Neural Networks and Reservoir Computing
- Spectroscopy and Quantum Chemical Studies
- Cosmology and Gravitation Theories
- Quantum Mechanics and Applications
- Random lasers and scattering media
University of Trento
2016-2025
Bose (United States)
2023
Fondazione Bruno Kessler
2022
Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications
2020-2022
Istituto di Fotonica e Nanotecnologie
2019
National Institute of Optics
2010-2019
Université Libre de Bruxelles
2019
University of Antwerp
2018
University of Pavia
2012
ETH Zurich
2009-2010
The robustness of the integer quantum Hall effect electron systems is due to existence a topological invariant that characterizes variation wave function over Brillouin zone. Topological phenomena are generic features waves in periodic media, and this article reviews how photonic such as waveguide arrays metamaterials allow exploration application effects new physical regimes devices.
This article reviews recent theoretical and experimental advances in the fundamental understanding active control of quantum fluids light nonlinear optical systems. In presence effective photon-photon interactions induced by nonlinearity medium, a many-photon system can behave collectively as fluid with number novel features stemming from its intrinsically nonequilibrium nature. A rich variety recently observed photon hydrodynamical effects is presented, superfluid flow around defect at low...
We present a quantum description of planar microcavity photon mode strongly coupled to semiconductor intersubband transition in presence two-dimensional electron gas. show that, this kind system, the vacuum Rabi frequency ${\ensuremath{\Omega}}_{R}$ can be significant fraction ${\ensuremath{\omega}}_{12}$. This regime ultrastrong light-matter coupling is enhanced for long-wavelength transitions, because given doping density, effective mass and number wells, ratio...
We develop a mean-field theory of the dynamics nonequilibrium Bose-Einstein condensate exciton polaritons in semiconductor microcavity. The spectrum elementary excitations around stationary state is analytically studied by means generalized Gross-Pitaevskii equation. A diffusive behavior Goldstone mode found spatially homogeneous case and new features are predicted for Josephson effect two-well geometry.
Two-dimensional lattices of coupled micropillars etched in a planar semiconductor microcavity offer workbench to engineer the band structure polaritons. We report experimental studies honeycomb where polariton low-energy dispersion is analogous that electrons graphene. Using energy-resolved photoluminescence, we directly observe Dirac cones, around which dynamics polaritons described by equation for massless particles. At higher energies, $p$ orbital bands, one them with nondispersive...
A condensed-matter system is used to study superfluid dynamics.
In a recent work [T. C. H. Liew and V. Savona, Phys. Rev. Lett. {\bf104}, 183601 (2010)] it was numerically shown that in photonic 'molecule' consisting of two coupled cavities, near-resonant coherent excitation could give rise to strong photon antibunching with surprisingly weak nonlinearity. Here, we show subtle quantum interference effect is responsible for the predicted efficient blockade effect. We analytically determine optimal on-site nonlinearity frequency detuning between pump field...
Recent technological advances in integrated photonics have spurred on the study of topological phenomena engineered bosonic systems. Indeed, controllability silicon ring-resonator arrays has opened up new perspectives for building lattices photons with topologically nontrivial bands and integrating them into photonic devices practical applications. Here, we push these developments even further by exploiting different modes a ring resonator as an extra dimension photons. Tunneling along this...
We propose and characterize solid-state photonic structures where light experiences an artificial gauge field. A nontrivial phase for photons tunneling between adjacent sites of a coupled cavity array can be obtained by inserting optically active materials in the structure or inducing suitable coupling propagation polarization degrees freedom. also discuss feasibility observing strong field effects optical spectra realistic systems, including Hofstadter butterfly spectrum.
We propose a realistic scheme to detect the 4D quantum Hall effect using ultracold atoms. Based on contemporary technology, motion along synthetic fourth dimension can be accomplished through controlled transitions between internal states of atoms arranged in 3D optical lattice. From semiclassical analysis, we identify linear and nonlinear quantized current responses our model, relating these topology Bloch bands. then experimental protocols, based or center-of-mass-drift measurements,...
Abstract Topological photonics seeks to control the behaviour of light through design protected topological modes in photonic structures. While this approach originated from studying electrons solid-state materials, it has since blossomed into a field that is at very forefront search for new types matter. This can have real implications future technologies by harnessing robustness applications devices. roadmap surveys some main emerging areas research within photonics, with special attention...
Abstract Metastability stems from the finite lifetime of a state when lower-energy configuration is available but only by tunnelling through an energy barrier. It observed in many natural situations, including chemical processes and electron field ionization. In classical many-body systems, metastability naturally emerges presence first-order phase transition. A prototypical example supercooled vapour. The extension to quantum theory systems has attracted significant interest context...
We study the motion of a polariton fluid injected into planar microcavity by continuous wave laser. In presence static defects, spectrum Bogoliubov-like excitations reflects onto shape and intensity resonant Rayleigh scattering emission pattern in both momentum real space. find superfluid regime which ring space collapses as well its normalized intensity. show how collective excitation spectra having no analog equilibrium systems can be observed tuning angle frequency.
We present a full quantum theory for the dissipative dynamics of an optical cavity in ultra-strong light-matter coupling regime, which vacuum Rabi frequency is comparable to electronic transition and anti-resonant terms play important role. In particular, our model can be applied case intersubband transitions doped semiconductor wells embedded microcavity. The intracavity photonic mode polarization external, frequency-dependent, dissipation baths taken into account by means Langevin...
We report numerical evidence of Hawking emission Bogoliubov phonons from a sonic horizon in flowing one-dimensional atomic Bose–Einstein condensate. The presence radiation is revealed peculiar long-range patterns the density–density correlation function gas. Quantitative agreement between our fully microscopic calculations and prediction analog models obtained hydrodynamic limit. New features are predicted robustness signal against finite temperature discussed.
We theoretically investigate the optical response of a one-dimensional array strongly nonlinear microcavities. When nonlinearity is much larger than both losses and intercavity tunnel coupling, nonequilibrium steady state system reminiscent correlated Tonks-Girardeau gas impenetrable bosons. Signatures strong correlations are identified in transmission spectrum system, as well intensity transmitted light. Possible experimental implementations state-of-the-art solid-state devices discussed.
We develop a general theory of the quantum vacuum radiation generated by an arbitrary time modulation Rabi frequency intersubband transition in doped well system embedded planar microcavity. Both nonradiative and radiative losses are included within input-output Langevin framework. The intensity spectral signatures extra-cavity emission characterized versus properties. For realistic parameters, photon pair is predicted to largely exceed blackbody mid far infrared. strong resonant parametric...
We investigate the quantum nonlinear dynamics of a resonantly excited photonic dot embedding well in strong exciton-photon coupling regime. Within master equation approach, we study polariton blockade effect due to polariton-polariton interactions as function geometry, spectral linewidths and energy detuning between exciton confined photon mode. The second order coherence ${g}^{(2)}(t,{t}^{\ensuremath{'}})$ antibunching are calculated for both continuous wave pulsed excitations.