A5032628565- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Quantum optics and atomic interactions
- Quantum Information and Cryptography
- Advanced Frequency and Time Standards
- Magneto-Optical Properties and Applications
- Atomic and Subatomic Physics Research
- Neural Networks and Reservoir Computing
- Laser-Matter Interactions and Applications
- Photonic Crystals and Applications
- Molecular Junctions and Nanostructures
- Laser-induced spectroscopy and plasma
- Orbital Angular Momentum in Optics
- Electrostatics and Colloid Interactions
- Advanced Materials Characterization Techniques
- Photonic Crystal and Fiber Optics
- Quantum Mechanics and Applications
- Cancer Treatment and Pharmacology
- Atomic and Molecular Physics
University of Science and Technology of China
2019-2025
Beijing Academy of Quantum Information Sciences
2021-2025
Chinese Academy of Sciences
2008-2022
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...
The magneto-optical trap (MOT) is an essential tool for collecting and preparing cold atoms with a wide range of applications. We demonstrate planar-integrated MOT by combining optical grating chip magnetic coil chip. flat simplifies the conventional six-beam configuration down to single laser beam, replaces anti-Helmholtz coils cylindrical geometry. Up ${10}^{6}$ ${}^{87}\mathrm{Rb}$ are trapped MOT, atom cloud being approximately $6\phantom{\rule{0.2em}{0ex}}\mathrm{mm}$ above surface....
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...
The nonlinear coupling between on-chip confined optical modes and free-space continuum is investigated. radiation of second-harmonic wave due to the pump fields in integrated lithium niobate microcavities experimentally observed. mechanism (NOR) further verified by demonstrating reversal process NOR, i.e., difference frequency generation a input an field. revealed NOR universal for all dielectric photonic devices, which indicates unavoidable extra energy leakage channels micro-...
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...
Single atoms are interesting candidates for studying quantum optics and information processing. Recently, trapping manipulation of single using tight optical dipole traps has generated considerable interest. Here we report an experimental investigation the dynamics in a modified trap with backward propagating beam, where change two-atom collision rate by six times been achieved. The theoretical model presented gives prediction high probabilities few-atom loading rates under proper...
To extend the coherence of quantum transitions for laser locking, as well increase compactness and stability experimental setup, we propose to utilize photonic integrated resonators with high second-harmonic (SH) generation efficiencies reliable frequency doublers that link desired frequencies references. In this Letter, a sufficiently strong SH signal up microwatts was generated by doubler using milliwatt infrared (IR) source. Furthermore, an increased bandwidth covering Rb85 Rb87D2...
Cavity-enhanced optical controlling is experimentally observed with a low-control laser power in cavity-atom ensemble system. Here, the three-level atoms are coupled two modes of Fabry-Perot cavity, where new theoretical model developed to describe effective three-wave mixing process between spin-wave and modes. By adjusting either temperature or cavity length, we demonstrate precise frequency tuning hybrid optical-atomic resonances. When doubly-resonant condition satisfied, probe can be...
Non-reciprocal optical components are indispensable in applications, and their realization without any magnetic field arose increasing research interests photonics. Exciting experimental progress has 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 other...
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 a novel approach to enhancing the loading of single by introducing weak ancillary beam. The rate trap can be significantly improved only few tens microwatts counter-propagating It was also demonstrated that multiple could loaded with assistance By reducing power requirements...
The fluorescence collection from single atoms and emitters has been extensively utilized in quantum information optics research. Here, we investigated the efficiency of an objective lens by drawing analogy between free-space beam (FSB) a waveguide mode. We explored how is influenced their thermal motion within dipole trap. Furthermore, introduce effective energy fraction ratio to quantify potential imperfections focusing lens. Our results provide valuable insights for optimizing single-atom...
The switching and control of optical fields based on nonlinear effects are often limited to relatively weak susceptibility strong pump fields. Here, an medium with programmable tensor polarizable atoms is proposed. Under a structured pump, the ground state population could be efficiently controlled by tuning chirality intensity fields, thus response in both space time. We demonstrate potential this approach engineering spatial distribution complex photonic structures realize nonreciprocal...
We report on the experimental realization of a standing-wave atom tweezer (SWAT) by aligning tightly focused dipole laser beams from commercial objective lens and metalens chip. By independently tuning intensities two beams, we demonstrate controlled loading multiple atoms into SWAT. systematically investigate influence potential modulation depth single-atom dynamics quantitatively estimate number in SWAT calculating fluorescence trapped atoms. Our results show that can trap chain more than...
Realizing large-scale quantum networks requires the generation of high-fidelity entanglement states between remote nodes, a key resource for communication, distributed computation and sensing applications. However, distribution network nodes is hindered by optical transmission loss local operation errors. Here, we propose novel repeater architecture that synergistically integrates Rydberg atom processors with cavities to overcome these challenges. Our scheme leverages cavity-mediated...
Precise control and manipulation of neutral atoms are essential for quantum technologies but largely dependent on conventional bulky optical setups. Here, we demonstrate a multifunctional metalens that integrates an achromatic lens with large numerical aperture, quarter-wave plate, polarizer trapping characterizing single Rubidium atoms. The simultaneously focuses beam at 852\,nm collects single-photon fluorescence 780\,nm. We observe strong dependence the lifetime external bias magnetic...
For the applications of frequency comb in microresonators, it is essential to obtain a fully frequency-stabilized microcomb laser source. Here, we demonstrate an atom-referenced stabilized soliton generation system based on integrated microring resonator. The pump light around $1560.48\,\mathrm{nm}$ locked ultra-low-expansion (ULE) cavity, frequency-doubled and referenced atomic transition $^{87}\mathrm{Rb}$. repetition rate injection-locked atomic-clock-stabilized radio (RF) source, leading...
Abstract The magneto-optical trap (MOT) is an essential tool for collecting and preparing cold atoms with a wide range of applications. We demonstrate planar-integrated MOT by combining optical grating chip magnetic coil chip. flat simplifies the conventional six-beam configuration down to single laser beam; replaces anti-Helmholtz coils cylindrical geometry. 10^{4} ^{87}\text{Rb} in MOT, at point 3-9 mm above surface. This novel effectively reduces volume, weight, complexity bringing...
Magnetic-free nonreciprocal optical devices have attracted great attention in recent years. Here, we investigated the magnetic-free polarization rotation of light an atom vapor cell. Two mechanisms nonreciprocity been realized ensembles hot atoms, including electromagnetically induced transparency and optically-induced magnetization. For a linearly polarized input probe light, angle up to 86.4° has with external control pump laser powers 10 mW is mainly attributed magnetization effect. Our...
We present an experimental study on the cavity-atom ensemble system, and realize doubly-resonant cavity enhanced electromagnetically induced transparency, where both probe control lasers are resonant with a Fabry-Perot cavity. demonstrate precise frequency manipulating of hybrid optical-atomic resonances, through either temperature or length tuning. In such power can be greatly due to cavity, all-optical switching is achieved much lower laser compared previous studies. A new theoretical...
The nonlinear optical radiation of an integrated lithium niobate microcavity is demonstrated, which has been neglected in previous studies photonic devices. We find that the coupling between confined modes on chip and continuum free space can be greatly enhanced platform microcavity, with feasible relaxation phase-matching condition. With infrared pump laser, we observe vertical second-harmonic wave at visible band, indicates a robust phase-matching-free chip-to-free-space frequency...
Single atoms are interesting candidates for studying quantum optics and information processing. Recently, trapping manipulation of single using tight optical dipole traps have generated considerable interest. Here we report an experimental investigation the dynamics in a modified trap with backward propagating beam, where change two-atom collision rate by six times has been achieved. The theoretical model presented gives prediction high probabilities few-atom loading rates under proper...