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Strong Interactions in Multimode Random Lasers
Unlike conventional lasers, diffusive random lasers (DRLs) have no resonator to trap light and no high-Q resonances to support lasing. Because of this lack of sharp resonances, the DRL has presentedExpand
Chiral modes and directional lasing at exceptional points
Significance Exceptional points (EPs) emerge when a system with loss or gain is tuned such that its eigenvalues and the corresponding eigenstates coalesce. By operating close to two EPs, we achievedExpand
Dynamically encircling an exceptional point for asymmetric mode switching
Physical systems with loss or gain have resonant modes that decay or grow exponentially with time. Whenever two such modes coalesce both in their resonant frequency and their rate of decay or growth,Expand
Non-Hermitian physics and PT symmetry
In recent years, notions drawn from non-Hermitian physics and parity–time (PT) symmetry have attracted considerable attention. In particular, the realization that the interplay between gain and lossExpand
Light fields in complex media: Mesoscopic scattering meets wave control
The newly emerging field of wave front shaping in complex media has recently seen enormous progress. The driving force behind these advances has been the experimental accessibility of the informationExpand
Parity–time symmetry and exceptional points in photonics
Exploiting the interplay between gain, loss and the coupling strength between different optical components creates a variety of new opportunities in photonics to generate, control and transmit light.Expand
Protecting a spin ensemble against decoherence in the strong-coupling regime of cavity QED
Hybridized systems offer a promising route for developing quantum devices, but inhomogeneous broadening limits the practical use of large spin ensembles. Suppression of the decoherence induced byExpand
Pump-induced exceptional points in lasers.
We demonstrate that the above-threshold behavior of a laser can be strongly affected by exceptional points which are induced by pumping the laser nonuniformly. At these singularities, the eigenstatesExpand
Cavity QED with magnetically coupled collective spin states.
We report strong coupling between an ensemble of nitrogen-vacancy center electron spins in diamond and a superconducting microwave coplanar waveguide resonator. The characteristic scaling of theExpand
Ballistic quantum transport at high energies and high magnetic fields
We present an extension of the modular recursive Green's function method for ballistic quantum transport to include magnetic fields. Dividing the nonseparable two-dimensional scattering problem intoExpand