A5079074756- Mechanical and Optical Resonators
- Orbital Angular Momentum in Optics
- Microfluidic and Bio-sensing Technologies
- Photonic and Optical Devices
- Near-Field Optical Microscopy
- Advanced MEMS and NEMS Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Force Microscopy Techniques and Applications
- Quantum Information and Cryptography
- Experimental and Theoretical Physics Studies
- Geophysics and Sensor Technology
- Quantum Electrodynamics and Casimir Effect
- Random lasers and scattering media
- Advanced Optical Sensing Technologies
- Digital Holography and Microscopy
- Advanced Measurement and Detection Methods
- Optical Coherence Tomography Applications
- Advanced Measurement and Metrology Techniques
- Acoustic Wave Resonator Technologies
- Advanced Thermodynamics and Statistical Mechanics
- Characterization and Applications of Magnetic Nanoparticles
- Plasmonic and Surface Plasmon Research
- Optical measurement and interference techniques
Zhejiang University
2012-2025
State Key Laboratory of Modern Optical Instruments
2018-2024
Zhejiang Lab
2020-2024
Nanjing University
2023
The nanomechanical resonator based on a levitated particle exhibits unique advantages in the development of ultrasensitive electric field detectors. We demonstrate three-dimensional, high-sensitivity measurement technology using optically nanoparticle with known net charge. By scanning relative position between and parallel electrodes, three-dimensional distribution microscale resolution is obtained. measured noise equivalent intensity charges <mml:math...
In this paper, a polymer micro-Fabry–Pérot interferometer (FPI) fabricated via direct laser writing using two-photon polymerization techniques on single mode fiber tip is proposed, designed, simulated, and experimentally demonstrated as magnetic field probe. The sensor comprises tapered waveguide with length of 100 µm diameter 1 along the axis connecting two reflecting surfaces micro-FPI open cavity. cavity filled fluid (MF) changing evanescent coupling consequently leading to change in...
Optically levitated oscillators in high vacuum have excellent environmental isolation and low mass compared with conventional solid-state sensors, which makes them suitable for ultrasensitive force detection. The resolution usually scales the measurement bandwidth, represents ultimate detection capability of system under ideal conditions if sufficient time is provided measurement. However, considering stability a real system, method based on Allan variance more reliable to evaluate actual...
In this work, the radiation force on a Rayleigh dielectric particle induced by partially coherent circular Airy beam (PCCAB) is investigated. Our numerical results show that PCCAB can be used to trap and manipulate particles. The distribution trapping stability have been analyzed under different lengths. It found that, with increase of spatial length, increased stably trapped at more points. Therefore, as well depth potential effectively modulated controlling length in optical...
Abstract Low-frequency (LF) wireless communications play a crucial role in ensuring anti-interference, long-range, and efficient communication across various environments. However, conventional LF systems, their antenna size is required to be inversely proportional the frequency, so that mobility flexibility are greatly limited. Here we introduce novel prototype of receiving antennas based on optically levitated nanoparticles, which overcomes size-frequency limitation reduce...
Abstract Polymer composites with carbon nanofillers are promising for electromagnetic shielding, performance influenced by filler geometry, orientation, and temperature. Spherical black enhances scattering, while anisotropic nanotubes (CNTs) exhibit directional wave propagation polarization. CNT orientation significantly affects the shielding efficiency, perpendicular alignment outperforming parallel alignment. Temperature‐dependent polarization further underscores need thermal...
We found a new type of noncircular symmetrical Airy beam called an elliptical (EAB). Using simple single-pixel checkerboard hologram method, we achieved the EAB in experiment. observed its unique property double focusing and ability energy to flow towards endpoints long axis during propagation. These particular properties will have some potential applications.
We presented faster and more accurate simulations experiments describing the revolution of a suspended particle in optical tweezers under low pressure. Instead state-of-the-art offline method pinhole alignment, we proposed an situ suppression by adjusting laser beam while observing power spectral density time-domain plot centroid displacement. The experimental results different air pressures show that our is effective at pressures. observed “revolution occurs when radial alignment error...
As one of the directions optical levitation technology, mass measurement micro-nano particles has always been a research hotspot in extremely weak mechanical measurements. When nanoscale are trapped an trap, parameters such as density, diameter, and shape unknown. Here we propose what believe to be new method measure by fitting particle motion information Maxwell speed distribution law, with accuracy better than 7% at 10 mbar. This characteristics requiring no external driving force, precise...
A dual-fiber optical trap system to and rotate a borosilicate microsphere has been proposed experimentally demonstrated. The trapping can be used as probe measure environmental parameters, such torque, force, viscosity of the surrounding medium. Under various conditions with different fiber misalignments, power, separation, trapped sphere will exhibit three motion profiles including random oscillation, round rotation, abnormal rotation. power spectrum analysis method is rotation rates up 385...
Accurate measurement of the net charge on nanoparticles is critical in research and practical applications. We proposed a method for accurately measuring through thermally harmonically driven motion signals. Our direct-charge-calculation achieves accuracies better than 5% at thermal equilibrium pressures more 10 mbar approximately 20% as low 3 mbar. This can improve accuracy mass density iterations provide direction non-contact characterization atmosphere space dust.
Optically levitated nanomechanical resonators in vacuum have attracted widespread attention for their ultrahigh sensitivity mechanical quantities by overcoming the limitations of clamped resonators. Although commonly utilized amorphous silica nanoparticles (NPs) exhibit low absorption and high transparency, they still face challenges to survive levitation environments unclear reasons. By monitoring physicochemical properties such as scattering, motion, mass, size, density NPs during pumping...
Optical trapping of single nanoparticles in vacuum has various applications both precise measurements and fundamental physics. However, to date, the number size randomly loaded an optical trap is difficult determine unless vacuum. In this Letter, efficient method for nanoparticle estimation tweezer system before evacuation air was proposed demonstrated experimentally, using scattering light from levitated particles. The particle radii deduced power our proposal kinetic theory particles gas...
Optical phase contains key information for biomedical and astronomical imaging. However, it is often obscured by layers of heterogeneous scattering media, which render optical imaging at different depths an utmost challenge. Limited the memory effect, current methods in strong media are inapplicable to retrieving phases depths. To address this challenge, we developed a speckle three-dimensional reconstruction network (STRN) recognize objects behind circumvents limitations effect. From...
We propose a design for hollow core photonic bandgap fiber (HC-PBF), with quasi-elliptical region stacked by modified periodic capillary tubes. This type of HC-PBF possesses birefringence > 4.6×10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-4</sup> in the wavelength range 1.46-1.59 μm, and low confinement loss <; 0.02 dB/m, while maintaining single-mode operation.