Electromagnetic coupling via an evanescent field or radiative wave is a primary characteristic of light,allowing optical signal/power transfer in a photonic circuit but limiting integration density.A leaky mode,which ...
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Electromagnetic coupling via an evanescent field or radiative wave is a primary characteristic of light,allowing optical signal/power transfer in a photonic circuit but limiting integration density.A leaky mode,which combines both evanescent field and radiative wave,causes stronger coupling and is thus considered not ideal for dense *** we show that a leaky oscillation with anisotropic perturbation rather can achieve completely zero crosstalk realized by subwavelength grating(SWG)*** oscillating fields in the SWGs enable coupling coefficients in each direction to counteract each other,resulting in completely zero *** experimentally demonstrate such an extraordinarily low coupling between closely spaced identical leaky SWG waveguides,suppressing the crosstalk by≈40 dB compared to conventional strip waveguides,corresponding to≈100 times longer coupling *** leaky-SWG suppresses the crosstalk of transverse–magnetic(TM)mode,which is challenging due to its low confinement,and marks a novel approach in electromagnetic coupling applicable to other spectral regimes and generic devices.
In quantum sensing of magnetic fields, ensembles of nitrogen-vacancy centers in diamond offer high sensitivity, high bandwidth and outstanding spatial resolution while operating in harsh environments. Moreover, the or...
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In quantum sensing of magnetic fields, ensembles of nitrogen-vacancy centers in diamond offer high sensitivity, high bandwidth and outstanding spatial resolution while operating in harsh environments. Moreover, the orientation of defect centers along four crystal axes forms an intrinsic coordinate system, enabling vector magnetometry within a single diamond crystal. While most vector magnetometers rely on a known bias magnetic field for full recovery of three-dimensional (3D) field information, employing external 3D Helmholtz coils or permanent magnets results in bulky, laboratory-bound setups, impeding miniaturization of the device. Here, a novel approach is presented that utilizes a fiber-integrated microscale coil at the fiber tip to generate a localized uniaxial magnetic field. The same fiber-tip coil is used in parallel for spin control by combining dc and microwave signals in a bias tee. To implement vector magnetometry using a uniaxial bias field, the orientation of the diamond crystal is preselected and then fully characterized by rotating a static magnetic field in three planes of rotation. The measurement of vector magnetic fields in the full solid angle is demonstrated with a shot-noise-limited sensitivity of 19.4nT/Hz1/2 and microscale spatial resolution while achieving a fiber sensor head cross section of less than 1mm2.
One of the key problems of the modern day is the presentation of an identity verification system that can perform sufficient accuracy in identity verification, is resilient to assaults and noises, and can be recorded ...
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We analyze a hierarchical optical node architecture supporting flexible band switching using WBSSs across a variety of spatial/spectral granularities from a wavelength channel to full-fiber switching, offering high-pe...
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We analyze a hierarchical optical node architecture supporting flexible band switching using WBSSs across a variety of spatial/spectral granularities from a wavelength channel to full-fiber switching, offering high-pe...
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This paper presents a detailed investigation into the development and assessment of a real-time spectrum analyzer implemented on a 65-nm CMOS Technology Application-Specific Integrated Circuit (ASIC). The analyzer fea...
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This paper describes a new approach to the problem of interception of wireless communication channels between the legitimate users. Physical PHY Layer Security (PLS) is new topic enhancing the secrecy performance of a...
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Cavity electromagnonic system,which simultaneously consists of cavities for photons,magnons(quanta of spin waves),and acoustic phonons,provides an exciting platform to achieve coherent energy transduction among differ...
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Cavity electromagnonic system,which simultaneously consists of cavities for photons,magnons(quanta of spin waves),and acoustic phonons,provides an exciting platform to achieve coherent energy transduction among different physical systems down to single quantum *** we report a dynamical phase-field model that allows simulating the coupled dynamics of the electromagnetic waves,magnetization,and strain in 3D multiphase *** examples of application,we computationally demonstrate the excitation of hybrid magnon-photon modes(magnon polaritons),Floquet-induced magnonic Aulter-Townes splitting,dynamical energy exchange(Rabi oscillation)and relative phase control(Ramsey interference)between the two magnon polariton *** simulation results are consistent with analytical calculations based on Floquet Hamiltonian *** are also performed to design a cavity electro-magno-mechanical system that enables the triple phononmagnon-photon resonance,where the resonant excitation of a chiral,fundamental(n=1)transverse acoustic phonon mode by magnon polaritons is *** the capability to predict coupling strength,dissipation rates,and temporal evolution of photon/magnon/phonon mode profiles using fundamental materials parameters as the inputs,the present dynamical phase-fieldmodel represents a valuable computational tool to guide the fabrication of the cavity electromagnonic system and the design of operating conditions for applications in quantum sensing,transduction,and communication.
Currently, there is no standardized approach for evaluating the efficiency of planar wireless power transfer (WPT) systems across varying specifications and sizes, particularly under positional deviations. This paper ...
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