Stimulated Brillouin scattering is a fundamental interaction between light and travelling acoustic waves arises primarily from electrostriction photoelastic effects, with an strength several orders of magnitude greater than that other relevant non-linear optical processes. Here we report experimental demonstration Brillouin-scattering-induced transparency in high-quality whispering-gallery-mode microresonantor. The triply resonant process underlying the greatly enhances light-acoustic...

We propose how to achieve nonreciprocal quantum entanglement of light and motion reveal its counterintuitive robustness against random losses. find that by splitting the counterpropagating lights a spinning resonator via Sagnac effect, photons phonons can be entangled strongly in chosen direction but fully uncorrelated other. This makes it possible both realize nonreciprocity even absence any classical also significant revival backscattering losses practical devices. Our work provides way...

Non-reciprocal devices, which allow the non-reciprocal signal routing, serve as fundamental elements in photonic and microwave circuits are crucial both classical quantum information processing. The radiation-pressure-induced coupling between light mechanical motion traveling wave resonators has been exploited to break Lorentz reciprocity, realizing devices without magnetic materials. Here, we experimentally demonstrate a reconfigurable nonreciprocal device with alternative functions of...

Synthetic gauge fields have recently emerged, arising in the context of quantum simulations, topological matter, and protected transportation excitations against defects. For example, an ultracold atom experiences a light-induced effective magnetic field when tunneling optical lattice, offering platform to simulate Hall effect insulators. Similarly, associated with photon transport between sites has been demonstrated coupled resonator array. Here, we report first experimental demonstration...

Mechanical degrees of freedom, which have often been overlooked in various quantum systems, studied for applications ranging from information processing to sensing. Here, we develop a hybrid platform consisting magnomechanical cavity and an optomechanical cavity, are coherently coupled by the straightway physical contact. The phonons system can be manipulated either with magnetostrictive interaction or optically through radiation pressure. Together mechanical state preparation sensitive...

Synchronization and frequency locking between remote mechanical oscillators are of scientific technological importance. The key challenges to align the oscillation frequencies realize strong nonlinear interaction both a common carrier capable long-distance transmission. Here, we experimentally all-optical synchronization two different optomechanical systems, microsphere microdisk. induced by radiation pressure is loaded onto pump laser via interaction, which directly transmitted through...

The transportation of photons and phonons typically obeys the principle reciprocity. Breaking reciprocity these bosonic excitations will enable corresponding nonreciprocal devices, such as isolators circulators. Here, we use two optical modes mechanical in a microresonator to form four-mode plaquette via radiation pressure force. phase-controlled routing between any with completely different frequencies is demonstrated, including phonon (megahertz megahertz), photon (terahertz especially...

Abstract The realization of optical non-reciprocity is crucial for many applications, and also fundamental importance manipulating protecting the photons with desired time-reversal symmetry. Recently, various new mechanisms magnetic-free have been proposed implemented, avoiding limitation strong magnetic field imposed by Faraday effect. However, due to difficulties in separating signal from drive laser noise induced laser, these devices exhibit limited isolation performances their quantum...

Coherent conversion of microwave and optical photons can significantly expand the capabilities information processing communications systems. Here, we experimentally demonstrate microwave-to-optical frequency in a magneto-optical whispering gallery mode microcavity. By applying magnetic field parallel to microsphere equator, intracavity will be modulated when magnon is excited by drive, leading via Stokes anti-Stokes scattering processes. The observed single-sideband phenomenon indicates...

In an optomechanical system, we experimentally engineer the optical density of state to reduce or broaden effective linewidth mode by introducing ancillary mechanical mode, which has a large decay rate, i.e., stimulated backward Brillouin scattering. Based on this dissipation engineering, could one order magnitude. addition, can either enhance suppress cooling and amplification target oscillations. Our scheme demonstrates cascaded photon-phonon coupling control interactions, also presents...

Abstract Non-reciprocal optical components are indispensable in applications, and their realization without any magnetic field has attracted increasing research interest photonics. Exciting experimental progress been achieved by either introducing spatial-temporal modulation of the medium or combining Kerr-type nonlinearity with spatial asymmetry photonic structures. However, extra driving fields required for first approach, while isolation noise transmission signal cannot be simultaneously...

In two-component Bose-Einstein condensates, the one-axis twisting Hamiltonian leads to spin squeezing with a limitation that scales number of atoms as ${N}^{\ensuremath{-}2/3}$. We propose scheme transform into two-axis Hamiltonian, resulting in enhanced proportional ${N}^{\ensuremath{-}1}$ approaching Heisenberg limit. Instead pulse sequences, only one continuous driving field is required realize such transformation, thus promising for experimental realization Hamiltonian. Quantum...

The quantum logic between single photons lies at the foundation of deterministic, scalable information processing. However, practical implementation suffers from weak optical nonlinearity, and gate fidelity is intrinsically limited by phase noise spectral mixing. authors address these concerns utilizing an ultrahigh-$Q$ photonic microcavity with ${\ensuremath{\chi}}^{2}$ nonlinearity. Two-photon spontaneous emission thoroughly suppressed shutting off coupling channels this artificial atom...

Thin-film gallium nitride (GaN) is a promising platform for phononic integrated circuits that hold great potential scalable information processing processors. Here, an unsuspended traveling resonator based on high-acoustic-index-contrast mechanism realized in GaN-on-Sapphire with frequency up to 5 GHz, which matches the typical superconducting qubit frequency. A sixfold increment quality factor found when temperature decreases from room (Q = 5000) 7 K 30 000), and thus, frequency-quality...

A scheme for observing photon blockade in a single bosonic mode with weak nonlinearity is proposed and numerically verified. Using simple bi-tone drive, sub- super-Poissonian light can be generated high fidelity. With periodically poled lithium niobate microcavity, sub-Poissonian source kHz count rate realized. Our robust against parameter variations of the cavity extendable to any system anharmonic energy levels.

The unconditional squeezing of the collective spins an atomic ensemble in a laser driven optical cavity [I. D. Leroux, M. H. Schleier-Smith, and V. Vuleti\ifmmode \acute{c}\else \'{c}\fi{}, Phys. Rev. Lett 104, 073602 (2010)] is studied analyzed theoretically. Surprisingly, we find that largely detuned driving can improve scaling from ${S}^{\ensuremath{-}2/5}$ to ${S}^{\ensuremath{-}2/3}$, where $S$ total spin. Moreover, also demonstrate experimental imperfection photon scattering into free...

We propose a new approach to realize all-optical circulator based on stimulated Brillouin scattering in an integrated microresonator. Stimulated is basic interaction between photon and traveling acoustic wave resulted from electrostriction photoelastic effects. Due the phase-matching requirement, circulating can only couple probe light which propagating along or opposite pump laser direction, thus exhibits non-reciprocal phase shift. Combined with Mach-Zehnder interferometer, optical be...

The Brillouin scattering induced transparency in a high quality optical microresonantor is experimentally demonstrated. Due to the phase matching condition, circulating acoustic phonon leads non-reciprocal light storage and retrieval.

We propose an optomechanical dissipation engineering scheme by introducing ancillary mechanical mode with a large decay rate to control the density of states optical mode. The effective linewidth can be reduced or broadened, manifesting engineering. To prove ability our improve performances system, we studied entanglement and phonon cooling. It is demonstrated that overwhelmed thermal excitations could restored via For cooling, order-of-magnitude improvement achieved. Our generalized other...

With advanced micro- and nanophotonic structures, the vacuum photon-photon coupling rate is anticipated to approach intrinsic loss lead unconventional quantum effects. Here, we investigate classical-to-quantum transition of such photonic nonlinear systems using cluster-expansion method, which addresses computational challenge in tracking large photon number states fundamental harmonic optical fields involved second-harmonic generation process. Compared mean-field approximation used...

Single atoms trapped in tightly focused optical dipole traps provide an excellent experimental platform for quantum computing, precision measurement, and fundamental physics research. In this work, we propose demonstrate approach to enhancing the loading of single by introducing a weak ancillary beam. The rate trap can be significantly improved only few tens microwatts counterpropagating It was also demonstrated that multiple could loaded with assistance By reducing power requirements...

Synchronization is of great scientific interest due to the abundant applications in a wide range systems. We propose an all-optical scheme achieve controllable long-distance synchronization two dissimilar optomechanical systems, which are unidirectionally coupled through fiber with light. Synchronization, unsynchronization, and dependence on driving laser strength intrinsic frequency mismatch studied based numerical simulation. Taking attenuation into account, we show that resonators can be...