Electrostatic MEMS transducer driven by repulsive force is an attractive possibility and has advantages of avoiding the pull-in instability, tuning natural frequency, achieving high sensitivity applying enough voltages. In this work, a “T”-shaped beam, which formed attaching secondary beam perpendicular to primary cantilever at tip, introduced its nonlinear dynamics analyzed. A reduced-order mo...

Optical wireless communications (OWC) utilizing infrared or visible light as the carrier attracts great attention in 6G research. Resonant beam (RBCom) is an OWC technology which simultaneously satisfies needs of non-mechanical mobility and high signal-to-noise ratio~(SNR). It has self-alignment feature therefore avoids positioning pointing operations. However, RBCom undergoes echo interference...

This research quantitatively investigates fluid damping of MEMS and NEMS flexural resonators such as scanning probe and carbon nano-tube resonators, aiming to improve the quality factor prediction and therefore the resonator design. Fluid damping in beam-type resonators is most affected by resonant frequency, device dimensions and cross-sectional shape which are systematically examined within. ...

On the basis of the unified theory of coherence and polarization, we investigate the behavior of the state of polarization of a stochastic electromagnetic beam in a Gaussian cavity. Formulations both in terms of Stokes parameters and in terms of polarization ellipse are given. We show that the state of polarization stabilizes, except in the case of a lossless cavity, after several passages betw...

We report the first high-gradient studies of a millimeter-wave accelerator, employing for the first time a planar dielectric accelerator, powered by means of a 0.5-A, 300-MeV, 11.424-GHz drive electron beam, synchronous at the 8th harmonic, 91.392 GHz. Embedded in a ring-resonator circuit within the electron beam line vacuum, this structure was operated at 20 MeV/m, with a circulating power of ...

We propose and simulate a new kind of compact polarizing beam splitter (PBS) based on a photonic crystal ring resonator (PCRR) with complete photonic bandgaps. The two polarized states are separated far enough by resonant and nonresonant coupling between the waveguide modes and the microring modes. Some defect holes are utilized to control the beam propagation. The simulated results obtained by...

Certain types of random rearrangements of attracting sets (attractors) arising in the phase space of a ring resonator containing a nonlinear medium are studied numerically. It is shown that for certain values of the parameters we can reduce the 2-D mapping describing the evolution of the field in the resonator to 1-D and give a qualitative explanation of the threshold phenomena observed. A meth...