Abstract Phonon lasers, which exploit coherent amplifications of phonons, are a means to explore nonlinear phononics, image nanomaterial structures and operate phononic devices. Recently, phonon laser governed by dispersive optomechanical coupling has been demonstrated levitating nanosphere in an optical tweezer. Such levitated devices, with minimal noise high vacuum, can allow flexible control large-mass objects without any internal discrete energy levels. However, it is challenging achieve...

Realizing optical trapping enhancement is crucial in biomedicine, fundamental physics, and precision measurement. Taking the metamaterials with artificially engineered permittivity as photonic force probes tweezers will offer unprecedented opportunities for trap enhancement. However, it usually involves multi-parameter optimization requires lengthy calculations; thereby few studies remain despite decades of research on tweezers. Here, we introduce a deep learning (DL) model to attack this...

Building on conventional dual-fiber optical trap systems, we have developed a multichannel chip that is simple and low-cost. This features three channels, enabling simultaneous capture of individual microspheres within liquid environment. With each microsphere being captured by opposing fibers at 45-mW power, the measured axial stiffnesses channel were 0.4626, 0.7184, 0.6467 pN/μm, respectively, whereas transverse 1.7794, 1.6885, 1.4560 pN/μm. may various applications in field microfluidics,...

<title>Abstract</title> The dual-fiber optical tweezers have become widespread in trapping, assembling, and sensing due to their simple fabrication process flexible operation. However, the miniaturization integration of displacement measurement paths remain challenging. Here, we propose experimentally demonstrate an structured-light (SLD) method tailored for tweezers. A key component split-waveplate is integrated onto fiber end via coating etching SLD method. etched another single mode form...

Abstract The dual-fiber optical tweezers have become widespread in trapping, assembling, and sensing due to their simple fabrication process flexible operation. However, the miniaturization integration of displacement measurement paths remain challenging. Here, we propose experimentally demonstrate an structured-light (SLD) method tailored for tweezers. A key component split-waveplate is integrated onto fiber end via coating etching SLD method. etched another single mode form tweezers, which...

We propose and demonstrate a novel optical orbital rotation technique for trapped particle in transversely misaligned dual-fiber trap. The frequency can be controlled by varying the power of two counterpropagating beams. theoretically analyze an force field exerted on 10-μm-diameter polystyrene simulate its dynamic trajectory within geometric optics regime framework. Results show that is realized with vortex distribution inherently stems from depends configuration dual-beam trap rather than...

We propose a method to generate Bessel-Gaussian (BG) beam by Gaussian array where beamlets are arranged along circle. The phase difference between adjacent is constant, and the total increment equal 2πl (l integer). Based on coherent superposition of array, we proved that vortex obtained combining (CBC) scheme Bessel when number beams sufficiently large. experimental results show combined BG (CBG) beam, despite existing side lobe, can still be generated limited beams. Therefore, feasibility...

A comprehensive dynamics analysis of microsphere has been presented in a dual-beam fiber-optic trap with transverse offset. As the offset distance between two counterpropagating beams increases, motion type starts capture, then spiral motion, orbital rotation, and ends escape. We analyze transformation process mechanism four types based on ray optics approximation. Dynamic simulations show that existence critical distances at which different transform. The result is an important step toward...

In optical traps the position of a trapped bead is usually determined by measuring intensity distribution forward-scattered light and back-scattered light. this paper we demonstrate that can be using side-scattered A quadrant photodiode used to monitor an optically object in dual-beam fiber-optic trap measurement shifts back focal plane objective perpendicular propagating beam. An approximated model based on ray optics presented with numerical results describe use for detection. The...

The spin and orbital rotation of the red blood cell (RBC) are achieved simultaneously by introducing a transverse offset to dual-beam fibre-optic trap. motion type captured RBC could be controlled adjusting distance. When distance is relatively small, observed in trap centre, with frequency increasing linearly Once above critical value, will rotate along an elliptic orbit, together motion. both decrease increased This technique allows mixing viewing living cells from different perspectives...

The orbital rotation is an important type of motion trapped particles apart from translation and spin rotation. It could be realized by introducing a transverse offset to the dual-beam fiber-optic trap. characteristics (e.g. perimeter frequency) have been analyzed in this article. We demonstrate influences distance, beam waist separation light power, radius microsphere both experimental numerical work. experiment results, i.e. frequency as functions these parameters, are consistent with...

Traditional compensation methods using temperature-related parameters have little effect when the ring laser gyroscope (RLG) bias changes rapidly. To solve this problem, a novel RLG temperature method readout signals is proposed in paper. Combined with least squares support vector machine (LS-SVM) algorithm, can improve precision of bias. Experiments show that by utilizing LS-SVM model, stability be significantly raised compared to original data. The paper shown feasible, even

Displacement measurement using a D-shaped mirror is key technology in optical tweezers, which have emerged as an important tool for precision measurement. In this paper, we first study the influences of installation errors on displacement The calibration factor and sensitivity different parameters are quantified. results show that variation obeys cosine curve with angle error, increases exponentially translation error. Besides, find error will also lead to crosstalk between transverse axial...

Optical trapping and manipulating nanoparticles are essential tools for interrogating biomedicine at the limits of space time. Typically, silica or polystyrene microspheres used as photonic force probes. However, adapting those probes to organic solvents is an ongoing challenge due limited solvent compatibility low refractive index mismatch. Here we report on optical enhancement that utilizes ZrO2@TiO2 core-shell nanoparticles. We experimentally demonstrate 450-nm-diameter achieve lateral...

Structured-light displacement detection method is an innovative approach with extremely high sensitivity for measuring the of a levitated particle. This scheme includes two key components, split-waveplate (SWP) and single-mode fiber. In this work, we further investigated influence SWP installation on regarding detection. The results indicate that increases expanding offset in effective range. addition, found has significant tolerance rate, extensive range 5%-25%. However, excessive can...

Phonon lasers, as mechanical analogues of optical are unique tools for not only fundamental studies phononics but also diverse applications such acoustic imaging and force sensing. Very recently, by levitating a micro-size sphere in an tweezer, higher-order harmonics were observed the phonon-lasing regime, first step towards nonlinear levitated optomechanics [Nat. Phys. 19, 414 (2023)]. However, both lasing strengths quality factors typically very low, thus severely hindering their...

Intracavity optical tweezers have been proposed and demonstrated recently, which allows orders-of-magnitude higher confinement with lower-numerical-aperture lens lower laser power in contrast to the standard tweezers. We further investigate its characteristics about position stability of trapped particles. The dependence radial axial on intensity acting particle 10-µm diameter intracavity are compared experimentally. Result shows that can make stronger under condition good trap operation,...

Dispersion engineering and measurement are significant for nonlinear photonic applications using whispering gallery mode microresonators. Specifically, the Kerr microresonator frequency comb as an important example has attracted a great amount of interest in research fields due to potential capability full integration on chip. A simple cost-efficient way dispersion measurements is thereby high demand designing such microcomb device. Here, we report approach fiber ring etalon reference. The...

Force detection with high sensitivity is of paramount importance in many fields study, from gravitational wave to investigations surface forces. Here, we propose and demonstrate a force-sensing method based on gain-enhanced nonlinearity nonlinear phonon laser. Experimental simulation results show that the input force leads frequency shift laser, due nonlinearity. In addition, further investigate influences pumping power, numerical aperture, microsphere's refractive index performance this...

High-resolution displacement detection can be achieved by analyzing the scattered light of trapping beams from particle in optical tweezers. In some applications where and detecting must separated, a beam introduced for independent measurement. However, focus possibly deviates center particle, which will affect performance detection. Here, we detect utilizing forward particle. The effects lateral axial offsets between on are analyzed simulation experiment. These results show that decrease...

The displacement measurement of the levitated particle is essential in optical tweezers vacuum. However, crosstalk between radial axes often occurs and will deteriorate precision. Common methods are proposed to align coordinate systems motion measurement, but few have considered polarizations trapping beam possible control. Here single SiO2 particles with a diameter 200nm trapped single-beam Balanced detectors D-shaped mirrors used measure particle's displacements. As expected, coefficient...

Single beam intracavity optical tweezers characterizes a novel trapping scheme where the laser operation is nonlinearly coupled to motion of trapped particle. Here, we first present and establish physical model from completely new perspective describe this coupling mechanism, using transfer matrices calculate loss free-space path then extracting scattering that caused by 3D motions Based on model, discuss equilibrium position in single tweezers. The influences numerical aperture, pumping...

In this Letter, we demonstrate the formation of a stable two-dimensional lattice colloidal particles in interference pattern formed by four evanescent optical fields at dielectric interface. The microspheres are observed to form square with vectors inclined relative beam propagation directions. We use digital video microscopy and particle tracking measure Brownian motion bound lattice, characterize fluctuations local ordering using bond orientational order parameter, probability distribution...