A5101808333- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Magnetic confinement fusion research
- Photonic Crystals and Applications
- Particle accelerators and beam dynamics
- Quantum optics and atomic interactions
- Semiconductor Lasers and Optical Devices
- Solid State Laser Technologies
- Advanced MEMS and NEMS Technologies
- Acoustic Wave Resonator Technologies
- Photonic Crystal and Fiber Optics
- Plasmonic and Surface Plasmon Research
- Advanced Photonic Communication Systems
- Force Microscopy Techniques and Applications
- GaN-based semiconductor devices and materials
- Optical Network Technologies
- Orbital Angular Momentum in Optics
- ZnO doping and properties
- Fusion materials and technologies
- Atomic and Subatomic Physics Research
- Optical Coatings and Gratings
- Gyrotron and Vacuum Electronics Research
- Ionosphere and magnetosphere dynamics
Beijing University of Technology
2025
Institute of Microelectronics
2024
Chinese Academy of Sciences
2008-2023
Shanghai University
2017-2023
Institute of Plasma Physics
2014-2023
Soochow University
2021
Huazhong University of Science and Technology
2021
Aston University
2018-2019
Okinawa Institute of Science and Technology Graduate University
2013-2018
Wuhan University of Technology
2012-2017
We report the experimental demonstration of storing optical information as a mechanical excitation in silica optomechanical resonator. use writing and readout laser pulses tuned to one frequency below an cavity resonance control coupling between displacement field at resonance. The pulse maps signal excitation. later converts back pulse. storage lifetime is determined by relatively long damping time
Sensors based on whispering gallery resonators have minute footprints and can push achievable sensitivities resolutions to their limits.Here, we use a microbubble resonator, with wall thickness of 500 nm an intrinsic Q-factor 10 7 in the telecommunications C-band, investigate aerostatic pressure sensing via stress strain material.The is made using two counter-propagating CO 2 laser beams focused onto microcapillary.The measured sensitivity 19 GHz/bar at 1.55 µm.We show that this be further...
We propose a scheme to realize quantum controlled phase flip (CPF) between two rare earth ions embedded in respective microsphere cavity via interacting with single-photon pulse sequence. The numerical simulations illuminate that the CPF gate is robust and scalable extremely high fidelity low error rate. Our more applicable than other schemes presented before based on current laboratory cavity-QED technology, it possible be used as an applied unit future computation communication.
The thermal shifting of whispering gallery modes (WGMs) in a microbubble resonator is investigated. shift rate determined for different when the core filled with air, water and ethanol. Sensitivities as high 100 GHz/K (0.2 nm/K at wavelength 775 nm) are observed This largest reported WGM resonator. We also show that behavior WGMs thin-shelled, air-filled from solid microsphere. measured shifts compared against finite element model simulations. <formula formulatype="inline"...
Sensing with whispering gallery resonators (WGRs) is largely limited by the weak perturbation of mode (WGM) via evanescent field. A new sensing regime using quasi-droplet WGMs allows WGRs to move beyond limitation field and push detection sensitivity heights. We present experimental results on 100 nm 500 nm polystyrene particles in aqueous solution thin-walled, hollow supporting modes. The terms shift broadening measured, shifts 400 MHz observed for particles. In number linewidths, this 276...
Optical properties and sensing capabilities of fused silica microbubbles were studied numerically using a finite element method.Mode characteristics, such as quality factor (Q) effective refractive index, determined for different bubble diameters shell thicknesses.For applications with whispering gallery modes (WGMs), thinner shells yield improved sensitivity.However, the Q-factor decreases reduced thickness this limits final resolution.Three types microbubbles, based on their optimized...
Coupled-mode induced transparency is realized in a single microbubble whispering gallery mode resonator. Using aerostatic tuning, we find that the pressure shifting rates are different for radial order modes. A finite element simulation considering both strain and stress effects shows GHz/bar difference this confirmed by experiments. spectrum obtained when first shifts across higher through precise tuning. The resulting lineshapes fitted with theory. This work lays foundation future...
Frequency comb generation in microresonators at visible wavelengths has found applications a variety of areas such as metrology, sensing, and imaging. To achieve Kerr combs based on four-wave mixing microresonator, dispersion must be the anomalous regime. In this Letter, we demonstrate engineering microbubble resonator (MBR) fabricated by two-CO2 laser beam technique. By decreasing wall thickness MBR to 1.4 μm, zero wavelength shifts values shorter than 764 nm, making phase matching possible...
Abstract We describe a novel method for making microbottle-shaped lasers by using CO 2 laser to melt Er:Yb glass onto silica microcapillaries or fibres. This is realised the fact that two glasses have different melting points. The power controlled flow doped around cylinder. In case of capillary, resulting geometry hollow, resonator. simple fabricating number whispering gallery mode (WGM) with wide range sizes on single, micron-scale structure. outer layer pumped at 980 nm via tapered...
In this work, we show that the application of a sol-gel coating renders microbubble whispering gallery resonator into an active device. During fabrication resonator, thin layer erbium-doped is applied to tapered microcapillary, then with wall thickness 1.3 μm formed rare earth ions diffused its wall. The doped pumped at 980 nm and lases in emission band Er3+ 1535 nm. laser wavelength can be shifted by aerostatic pressure tuning modes microbubble. Up 240 pm observed 2 bar pressure. We also...
A long pulse electron cyclotron resonance heating (ECRH) system has been developed to meet the requirements of steady-state operation for EAST superconducting tokamak, and first EC wave was successfully injected into plasma during 2015 spring campaign. The is mainly composed four 140 GHz gyrotron systems, 4 ITER-Like transmission lines, independent channel launchers corresponding power supplies, a water cooling, control & inter-lock etc. Each expected deliver maximum 1 MW be operated at...
We report on tuning the optical whispering gallery modes in a poly dimethyl siloxane-based (PDMS) microsphere resonator by more than THz. The PDMS system consists of solid spherical directly formed with double stems either side. act like tie-rods for simple mechanical stretching microresonator over tens microns, resulting one free spectral range. Further investigations demonstrate that mode shift has higher sensitivity (0.13 nm/{\mu}N) to an applied force when is its maximally stretched...
Low-frequency noise in detection systems significantly affects the performance of ultrasensitive and ultracompact spin-exchange relaxation-free atomic magnetometers. High frequency modulation helps effectively suppress 1/f enhance signal-to-noise ratio, but conventional modulators are bulky restrict development integrated magnetometer modulation-detection systems. Resonant metasurface-based thin-film lithium-niobate (TFLN) active optics can modulate free-space light within a compact...
Abstract Ion cyclotron resonance heating (ICRH) plays a crucial role in magnetic confinement nuclear fusion, enhancing plasma temperature and enabling sustained fusion reactions. Full wave simulations the ion range of frequency (ICRF) are essential for exploring mechanisms guiding experiments. This paper focuses on development application finite element method (FEM) based full simulation code, INTFLUK, which incorporates poloidal field to account up down shift effect parallel number. The...
We propose a scheme for realizing two-qubit quantum phase gate between atoms inside high-$Q$ optical cavity. In the scheme, dispersive interaction and cavity field induces photon-number Stark shift, which can yield resonant one selected atom-field subspace leave others in highly regime. Due to selective atom-cavity interaction, (1) only requires commonly addressing during operation, (2) it be directly used implement an $N$-qubit conditional gate. These properties significantly reduce number...
CdSe/ZnS colloidal quantum dots generally exist as blinking phenomena during the luminescence process that remarkably influences its applications. In this work, we used surface plasmonic effect to effectively modulate single dots. Obvious contrasts have been observed by comparing on silica and gold films. The plasmon is shown obviously suppress of With further demonstrated second- order correlation measurements, an anti-bunching was observed. dip gives smallest value g(2)(0) = 0.15, lifetime...
In this letter, a packaged add-drop filter composed of silica microsphere resonator with diameter <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$80~\mu \text{m}$ </tex-math></inline-formula> and an optical microfiber coupler waist 1 notation="LaTeX">$\mu is investigated. A one-step fabrication process using UV curable epoxy shown to stabilize the coupling between coupler, which used for add drop ports....
A hollow bottle-like microresonator (BLMR) with ultra-high quality factor is fabricated from a microcapillary nearly parabolic profile. At 1.55 $\mu m$ pumping, degenerate four-wave mixing can be observed for BLMR of diameter 102 $\mu$m. The profile the guarantees zero waveguide dispersion, which theoretically discussed in detail. From simulation, at $\mu$m wavelength such BLMR, fundamental bottle mode anomalous dispersion regime, whilst ordinary whispering gallery (WGM) confined center...
Dissipative optomechanics has some advantages in cooling compared to the conventional dispersion dominated systems. Here, we study optical response of a cantilever-like, silica, microsphere pendulum, evanescently coupled fiber taper. In whispering gallery mode resonator, cavity and motion pendulum result both dispersive dissipative optomechanical interactions. This unique mechanism leads an experimentally observable, asymmetric function transduction spectrum, which can be explained using...
We have numerically studied a taper-microsphere coupling system with coupled-mode theory by introducing mode-coupling mechanism. Transmission and reflection coefficients been obtained directly through numerical calculation for spherical silica microcavity. In the presence of modal mechanism, optimal condition transferring light energy into microsphere is no longer critical point. Instead, it should be in under-coupling regime can reached optimizing size fiber taper gap.
Whispering gallery modes in silica microspheres are excited by a tunable continuous-wave laser through the fiber taper.Ringing phenomenon can be observed with high frequency sweeping speed.The thermal nonlinearity microsphere enhance this phenomenon.Our measurement results agree very well theoretical predictions dynamic equation.
The tunability of an optical cavity is essential requirement for many areas research. Here, we use the Pound-Drever-Hall technique to lock a laser whispering gallery mode (WGM) microbubble resonator, show that linear tuning WGM, and corresponding locked laser, display almost zero hysteresis. By applying aerostatic pressure interior surface shift rates around $58$ GHz/MPa are achieved. can measure with detection limit $2\times 10^{-4}$ MPa, which improvement made on sensing using this device....