We experimentally demonstrate a stable polarization mode operation in long-wavelength tunable vertical-cavity surface-emitting lasers over 65-nm tuning range and the entire output power (< 14.6 mW) at room temperature. The control was achieved by utilizing anisotropic gain properties of quantum wells due to difference bond lengths between constituent atoms interfaces combined with uni-axial external strain induced stressor. experiments were conducted verify this newly proposed scheme based...

In this Letter, we report on a plasmonic nano-ellipse metasurface with the purpose of trapping and two-dimensional (2D) arbitrary transport nanoparticles by means rotating polarization an excitation beam. The locations hot spots within are dependent, thus making it possible to turn on/off adjacent then convey trapped target incident state. For case unit cell perpendicularly orientated nano-ellipses, higher intensities located at both apexes whose major axis is parallel direction...

In this Letter, we have proposed an optically levitated conveyor belt based on periodic arrays of a polarization-dependent nanoslit-based metasurface lens (NBML) that is capable realizing far-field capture, transport, and sorting. The NBML in can be lit up relay way by rotating the polarization angle excitation beam thereby provide better stiffness for transporting particles. When excited at wavelength 1064 nm power density 0.3 mW/µm2, particles will follow directional movement hot spots...

We report a nano-optical conveyor belt containing an array of gold plasmonic non-concentric nanorings (PNNRs) for the realization trapping and unidirectional transportation nanoparticles through rotating polarization excitation beam. The location hot spots within asymmetric nanostructure is dependent, thus making it possible to manipulate trapped target by incident state. In case PNNR, two poles have highly unbalanced trap potential. This greatly enhances chance transferring particles...

In this letter, we have proposed a two-dimension (2D) non-contact optically levitated nano-conveyor belt based on the photonic nanojet (PNJ) effect of microspheres array which is embedded in cover layer optofluidic channel. Au-layer plate at shadow side microsphers also introduced and its specular reflection will form quasi-standing wave PNJ, can largely enhance trapping stiffness for nano-objects transport other two directions. Furthermore, since spherical symmetry, periodical tuning...

In recent years, optical tweezers have become an effective bioassay tool due to their unique advantages, especially in combination with suspension beads, which can be applied develop a high-performance analysis platform capable of high-quality imaging and stable signal output. However, the tweezer-assisted bead is still at early stage, further development different favorable methods need. Herein, we first developed immuno-rolling circle amplification (immuno-RCA) on beads for protein...

We propose an optofluidic sorting method for nanoparticles with different size by using optical waveguide splitter, and moreover, multiple cascaded splitters threshold could act as multi-level unit. For a directional coupler (DC) specific wavelength excitation, the power splitting ratio is related to coupling length gap between parallel waveguides. The further determines trapping force potential wells distribution of both output ports. Most importantly, well dependent on particle size....

Based on the optical trapping force of an evanescent wave at a micro-ring resonator alongside waveguide, we propose tunable optofluidic sorting unit for micro-nanoparticles by localized thermal phase tuning. With tuning field build-up factor resonator, depth potential well and size trapped particle are adjustable. Furthermore, considering Brownian motion particles from statistics perspective, verify critical threshold well, which is usually assumed to be 1kBT. The depends not only power...

In this Letter, we have proposed a particle manipulation system based on polarization-dependent dielectric metasurface (PDM), which enables far-field trapping and 2D arbitrary transporting. Based flexible phase manipulation, by tuning the size angle of meta-atoms, polarization-selective focusing in different modules can be realized. Then, when those regional focuses are continuously lighted relay way, trapped at focus could delivered to next one. When six characteristic polarization states...

In this paper, a new hybrid permanent magnet variable leakage flux (VLF-HPM) motor is proposed. order to enhance speed range, short arc-shaped and elliptical-shaped magnetic barriers are placed on the q-axis circuit, realizing so-called effect. addition, ferrite PMs artfully designed, so self-leakage can be reduced while main enhanced. The relationship among PM topology, barrier flux-regulation capability also investigated in detail. Finally, electromagnetic performance of VLF-HPM evaluated...

In this Letter, we have proposed a nano-optical convey belt consisting of three sets graphene nano-butterfly structures (GNBS) with different lengths arranged in periodic pattern to trap, transport, and sort particles depending on controlling the Fermi level graphene. The structure, based couple trapezoids, can form potential well capture by localized surface plasmon resonance under excitation an incident laser. There are adjustable geometric parameters containing width (W1, W2) length (L)...

Deep-sea hydraulic collection is a key technology for seabed mineral resource extraction, offering higher efficiency and environmental protection compared to other methods. However, due their complex characteristics, the suction properties influencing factors of polyhedral particles in remain elusive. This study utilized dimensionless methods conducted experiments analyze flow characteristics cone-shaped hoods distribution force on particles, researched effect various parameters, such as Φ,...

A tunable metal surface composed of periodically arranged graphene nanodisks (GNDs) has been designed to achieve precise regulation two-dimensional light fields. Since the distribution hot spots (i.e., locally enhanced fields) around GND is closely related polarization state, it can be reconfigured by rotating direction transport trapped particles along edge disk. By adjusting Fermi level activate corresponding GND, directional transmission target between adjacent realized. The rotation...

In this Letter, we propose a novel metasurface conveyor belt with periodic orientated arrays of gold plasmonic elliptical elements (GPEEs), which can be continuously lit in relay way by switching the polarization excitation beam and used to trap, transport, sort particles. The array hot field provide larger trapping area better stiffness. With incident optical intensity <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mn>0.08</mml:mn> <mml:mspace...

For a non-coherent multiple-input multiple-output radar system, the minimum mean square error (MMSE) estimator and maximum posteriori (MAP) of target location velocity, considered random unknown parameters, are formulated corresponding posterior Cramér-Rao lower bound (PCRLB) is derived. Moreover, numerical solutions for proposed MMSE PCRLB obtained by using Monte-Carlo methods because absence closed-form solutions. The results show that errors (MSEs) estimate MAP converge to as...

We report an integrated optofluidic micro-pump with a pair of mirrored stirrers circulating micro-beads in micro-channel, driven by plasmon-assisted optical manipulation the excitation polarization rotating beam. H-shaped apertures (HSAs) on gold surface produce strong near-field hot spots when they are illuminated light beam polarized parallel to long axis "H." With polarization, loops HSAs gradually varied orientations can circulation spots, which further trap and make them go around...

Nano-Grating measurement technology has been made great development in our country, for its unique advantage which isn’t available laser interferometer. This paper presents a Nano-grating interferometer displacement measuring system based on double diffraction grating and Semiconductor light source, analyzes the error origin of detail uses correction compensation method to improve accuracy. The experimental result indicated that does have stable interferometer, high signal contrast, easy...

Based on the balance between scattering force and trapping of an evanescent field a standing wave silicon waveguides, we propose structure for controllable releasing nanoparticles, which can act as pause operation nanoparticle flow control. The design is realized by cascade optical switch with ring-assisted Mach-Zehnder interferometer (RAMZI) Sagnac loop reflector connects to one output switch. Through thermal tuning, tiny refractive index change 4.3×10-4 ring resonator, RAMZI be switched...

In this letter, we propose a plasmonic conveyor belt based on periodically arranged graphene nanorings (GNRs) with different size, which the hot spots could be continuously lighted up by electrically tuning Fermi level of and used for trapping transporting nanoparticles even under uniform Mid-infrared or terahertz light excitation. Graphene nano-structure supports surface plasmon resonance, its resonance condition is not only related but also adjusted level, as well applied gate voltage....

Extraordinary optical transmission in free space through nanohole arrays has been widely investigated over the past two decades. However, because of its intrinsic nature periodicity, it suffers from poor integration with nano-/micro-systems. Here, by folding a periodic grating into compact cavity, we propose waveguide-based structure within subwavelength, which also exhibits extraordinary transmission. Thus, lots promising applications realized metallic films can now be migrated onto...

In this Letter, we report a nano-optical conveyor belt containing couple of graphene nano-ribbon pairs (GNRPs) with graded lengths for the realization trapping and transport nanoparticles through manipulating Fermi energy graphene. mid-infrared waveband, behaves like metals, even more importantly, it supports tunable surface plasmon resonance (SPR) via its energy. The spectral responses these nano-ribbons individual dimensions are dominated by their geometric parameters conductivity, which...

We propose the graphene film with trapezoid-shaped nanoparticles (GTNAs) to transport particles. In our design, conversion of plasmon surface resonances can be realized without changing excitation light source. By sequentially activating three closely packed potential wells, transported between adjacent traps in a creeping manner. Three wells form linearly repeating array structure, forming nano-optical conveyor belt. When resonant wavelength is 5.5 μm, and power density 0.4 mW/μm <sup...