In recent years, research on the manipulation and control of microrobot has gradually matured. order to improve intelligence microrobots, navigation study also becomes an important topic. practice, microrobots could be disturbed by flowing liquid when it moves in a microfluidic environment. As result, actual trajectory will deviate from intended one. this paper, firstly, different algorithms for simulated plant leaf vein environment are investigated. According simulation results,...

We experimentally demonstrate on-chip mode-selective wavelength conversions based on the degenerate four-wave mixing (FWM) nonlinear effect in a few-mode silicon waveguide. A multimode waveguide with tapered directional coupler mode (de)multiplexers is designed and fabricated. Using signals advanced modulation formats all-optical of 102.6-Gb/s OFDM-QPSK are verified. Experimental results show that only small optical signal-to-noise ratio (OSNR) penalties observed after conversion both modes,...

We experimentally demonstrate on-chip dual-channel all-optical AND logic operations based on four-wave mixing (FWM) for on-off keying (OOK) signals in a multimode silicon waveguide. A two-mode (de)multiplexing circuit consisting of tapered directional coupler-based (de)multiplexers and waveguide is designed fabricated this application. Experimental results show open eye-diagrams confirm the with moderate power penalties both modes.

Abstract As one of the possible extensions Einstein's General Theory Relativity, it has been recently suggested that presence space-time torsion could solve problems very early and late-time universe undergoing accelerating phases. In this paper, we use latest observations high-redshift data, coming from multiple measurements quasars baryon acoustic oscillations, to phenomenologically constrain such cosmological model in framework Einstein-Cartan (EC) endowed with torsion. Such newly...

Abstract Recently, the global warming and climate changes have aroused focus of attentions. Hence, there is an increased demand to capture, utilize, sequestrate greenhouse gas, i.e., carbon dioxide (CO 2 ), for promising applications. Functionally cooperating mini‐generators are a kind self‐propelled smart devices that can harvest environmental energy convert it electricity through Faraday's law. But traditional based on energy‐consuming process appealing consumption from high‐grade state...

.A high-order mode rotator based on a silicon-on-insulator strip waveguide with asymmetrical cross section is proposed and optimized to rotate the spatial distribution of E <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</sub> by 90° into that xmlns:xlink="http://www.w3.org/1999/xlink">12</sub> mode. The subscripts i j xmlns:xlink="http://www.w3.org/1999/xlink">ij</sub> correspond number lobes in intensity along horizontal vertical axes,...

We study mode coupling of an edge state with bulk states in a coupled waveguide chain the presence gain and losses. In low non-Hermiticity regime, it is found that associated interface between two topologically different chains well isolated from states, sharing exact same features as well-known Su-Schrieffer-Heeger Model. As increases, bands overall merge together, which leads to overlap band diagram lower bands. find before PT-symmetry breaking, strongly bands, evident by anti-crossing...

Manipulating micro-robots in blood vessels is an essential technology for medical researchers applications such as drug delivery and thrombus removal. The usage of medicine can help overcome the limitations many conventional clinical methods. In this study, we aimed to make micro-robot more intelligent while moving through vessels. First, skeleton image extracted, which further used path planning. Then, skeleton-extraction-based A* algorithm was determining a best route movement microrobot...

We investigate the potential of an ultrafast transverse mode switch based on silicon insulator (SOI) platform for switching applications in spatial division multiplexing (SDM) systems. The impact waveguide geometry, operation wavelength, pulse width pump and probe waves, as well temporal delay between pulses are discussed with a special focus windows switch. optimized performances further applied to node hybrid optical time division-multiplexing (OTDM) SDM system. energy Si-based is shown be...

We experimentally demonstrate excitation of orbital angular momentum states in an air-core fiber by a silicon integrated vortex beam emitter which is designed and fabricated to match the modes supported fiber. The coupling loss measured be ~7.5 dB. Excitation eigenmodes confirmed analyzing output.

Abstract Electromagnetic actuation is a new technique for non-invasive manipulation, which provides wireless and controllable power source magnetic micro/nano particles. This shows great potential in the field of precise mechanics, environment protection biomedical engineering. In this paper, quadrupole electromagnetic actuated system constructed, composed four coils, each coil by an independent DC supplier. The distribution workspace obtained through finite element modeling numerical...

The electromagnetic system is driven by multiple programmable power supplies manipulating the micro-robot. Robot movement observed and analyzed through CCD camera in real time. Thus, force could be adjusted accordingly. An integrated based on LabViewwas proposed this paper, combining visual feedback coils system, which realizes analysis of robot motion state real-time control supplies. Experiment linear magnetic microbead constructed for pretest preliminary calibration. Furthermore, PID...

As the need for high-capacity on-chip optical interconnects is becoming increasingly critical, mode-division multiplexing (MDM) has been exploited to solve this problem silicon-on-insulator (SOI)-based planar integrated circuits (PICs). For MDM, a mode multi/demultiplexer (MUX/DEMUX) key component. Seeking vertical expansion of high-order field distributions, namely E <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ij</sub> modes with i =1 and j...

As one of the possible extensions Einstein's General Theory Relativity, it has been recently suggested that presence spacetime torsion could solve problems very early and late-time universe undergoing accelerating phases. In this paper, we use latest observations high-redshift data, coming from multiple measurements quasars baryon acoustic oscillations, to phenomenologically constrain such cosmological model in framework Einstein-Cartan (EC) endowed with torsion. Such newly compiled quasar...

In this paper, a physical insight based neural network small signal MOSFET model is proposed, which can accurately and efficiently describe the high-frequency behavior of MOSFET. By incorporating prior knowledge in preprocessing stage networks, demonstrates enhancement precision reliability capable describing non-quasi-static effects as well other parasitic second-order precisely. The proposed validated with data obtained by TCAD simulation up to 1THz, predict y-parameters 3σ error less than 3%.

We demonstrate for the first time dual-channel all-optical AND logic operations based on intra-modal four-wave mixing (FWM) on-off keying (OOK) signals in a multimode silicon waveguide. Correct temporal waveform sequences and clear eye-diagrams are presented to confirm this proof-of-concept work.

Electromagnetic methods have been applied in many advanced applications, such as circuit design, geophysical exploration, medical imaging, and environmental perception. Since it can represent a high-fidelity virtual experiment quite close to the real world, these are more reliable than approximate methods. However, working frequency gets smaller smaller, discretized linear system become poorly conditioned thus difficult solve. Typical examples include Airborne Transient Electromagnetics...

Intensifying US–China rivalry has heightened the risk of accidental crises that might spiral out control. Even as President Biden continues much Trump administration’s confrontational approach to China, senior administration officials agree on strategic imperative improving reduction mechanisms between Beijing and Washington. Though odds armed conflict arising from deliberate provocations may be low, risks spinoff in China’s periphery emerging domains like space cyberspace have grown recent...

In recent years, the research of microrobots in medicine has gradually matured. Navigation for micro-robot's movement also become important research. However, actual manipulation process micro-robot, it will be disturbed by flowing blood while moving vessel. Thus, trajectory deviated from predetermined one. this paper, different algorithms were investigated navigation micro-robot blood-vessel mimic environment. Informed-RRT* was chosen as a better performed algorithm, according to simulation...