A5076680792- Superconducting and THz Device Technology
- Photonic and Optical Devices
- Quantum Information and Cryptography
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Photorefractive and Nonlinear Optics
- Radio Frequency Integrated Circuit Design
- Advanced Fiber Laser Technologies
- Quantum optics and atomic interactions
- Algebraic structures and combinatorial models
- Microwave Engineering and Waveguides
- Nonlinear Waves and Solitons
- Astrophysics and Cosmic Phenomena
- Mechanical and Optical Resonators
- Thermal Radiation and Cooling Technologies
- VLSI and FPGA Design Techniques
- Dark Matter and Cosmic Phenomena
- Zebrafish Biomedical Research Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Black Holes and Theoretical Physics
- Gamma-ray bursts and supernovae
- VLSI and Analog Circuit Testing
- Advanced MEMS and NEMS Technologies
- Advanced Topics in Algebra
- Radio Astronomy Observations and Technology
Southwest Jiaotong University
2014-2025
Nanjing University
2007-2025
Jiangnan University
2025
Donghua University
2025
Ministry of Ecology and Environment
2025
Lanzhou Jiaotong University
2022-2024
National Defense Medical Center
2024
Chang Gung University
2024
Xi'an University of Science and Technology
2024
Shanghai Maritime University
2024
This paper presents a kernelized version of the extended recursive least squares (EX-KRLS) algorithm which implements for first time general linear state model in reproducing kernel Hilbert spaces (RKHS), or equivalently nonlinear input space. The center piece this development is reformulation well known (EX-RLS) RKHS only requires inner product operations between vectors, thus enabling application property (commonly as trick). part set theorems that shows generality approach. EX-KRLS...
We demonstrate photon-noise limited performance at sub-millimeter wavelengths in feedhorn-coupled, microwave kinetic inductance detectors made of a TiN/Ti/TiN trilayer superconducting film, tuned to have transition temperature 1.4 K. Micro-machining the silicon-on-insulator wafer backside creates quarter-wavelength backshort optimized for efficient coupling 250 μm. Using frequency read out and when viewing variable blackbody source, we measure device noise consistent with photon incident...
Previous literature has examined the relationship between amount of green space and perceived safety in urban areas, but little is known about effect street-view neighborhood greenery on safety. Using a deep learning approach, we derived from massive set street view images central Guangzhou. We further tested relationships mechanisms fear crime neighborhood. Results demonstrated that higher level was associated with lower crime, its mediated by physical incivilities. While increasing...
Strip-loaded waveguides were fabricated by the direct oxidation of a titanium film based on single-crystal lithium niobate. The method avoided surface roughness problems that are normally introduced during dry etching waveguide sidewalls. Propagation modes composite strip analyzed full-vectorial finite difference method. minimum dimensions propagation calculated to be 0.7 μm(2) and 1.1 for quasi-TM mode quasi-TE at 1550 nm when thickness LN layer TiO(2) was 660 95 nm, respectively. optical...
We demonstrate photon counting at 1550 nm wavelength using microwave kinetic inductance detectors (MKIDs) made from TiN/Ti/TiN trilayer films with superconducting transition temperature Tc≈ 1.4 K. The have a lumped-element design large interdigitated capacitor covered by aluminum and inductive absorbers whose volume ranges 0.4 μm3 to 20 μm3. energy resolution improves as the absorber is reduced. achieved an of 0.22 eV resolved up 7 photons per optical pulse, both greatly improved previously...
We report low-loss channel waveguides in a single-crystal LiNbO(3) thin film achieved using the annealed proton exchange process. The simulation indicated that mode size of α phase waveguide could be as small 1.2 μm(2). Waveguides with several different widths were fabricated, and 4 μm-wide exhibited 4.6 Its propagation loss was accurately evaluated to low 0.6 dB/cm at 1.55 μm. lattice structure preserved by moderate process (5 min 200°C, followed 3 h annealing 350°C), revealed measuring...
To improve the coupling efficiency between a single-mode fiber and waveguide on lithium niobate thin film (LNOI), fiber-to-chip grating coupler with metal bottom reflector was designed, fabricated, characterized. A maximum of −9.1 dB −6.9 for LNOI without measured, respectively. Fabrication error sensitivity etch depth experimentally investigated discrepancy simulation experiment discussed.
A microwave SQUID multiplexer ($\mu$MUX) has been optimized for coupling to large arrays of superconducting transition-edge sensor (TES) bolometers. We present the scalable cryogenic chip design in a 1820-channel configuration 4-8 GHz rf band. The key metrics yield, sensitivity, and crosstalk are determined through measurements 455 readout channels, which span 4-5 GHz. median white-noise level is 45 pA/$\sqrt{\textrm{Hz}}$, evaluated at 2 Hz, with 1/f knee $\leq$ 20 mHz after common-mode...
Total syntheses of multidrug resistant inhibitors (−)-acetylardeemin 2a, (−)-ardeemin 2b, and (−)-formylardeemin 3 have been achieved within 10 steps starting from bromopyrroloinoline 13. The key step involves direct alkylation 13 with prenyl tributylstannane 11 to yield 12via a silver-promoted asymmetric Friedel–Crafts reaction. Highly efficient installation the isoprenyl group allowed excellent overall yield. Moreover, substrate scope reaction was expanded include variety arenes 14 afford...
Proton exchanged channel waveguides in x-cut single-crystal lithium niobate thin film could avoid optical leakage loss which existed the z-cut case. Indicated by simulations, mechanism and condition of were studied. The light energy layer mode sizes calculated to optimize parameters for fabrication. By a very short time (3 minutes) proton exchange process without anneal, waveguide with 2 μm width 0.16 depth had propagation as low 0.2 dB/cm at 1.55 μm. Furthermore, Y-junctions based on...
The heterogeneous integration of an amorphous silicon (a-Si) film with a lithium niobate (LN) thin combines both the mature micro-processing technology Si and excellent optical properties LN. An a-Si was deposited on LN film, strip-loaded waveguides were designed, fabricated, characterized. A full-vectorial finite difference method used to explore single-mode conditions appropriate dimensions for waveguides. waveguide mode size could be as small 0.36 μm2. By adjusting thickness width loading...
Owing to extremely low concentrations and dynamic changes, it is difficult detect trace the retronasal volatile organic compounds (VOCs) generated during consumption of alcoholic beverages. We developed a direct sampling gas chromatography-ion mobility spectrometry (GC-IMS) method identify VOCs after drinking Huangjiu-a fermented The optimal procedure was obtained: take sip 10 mL Huangjiu, holding in mouth for s then swallow, one nasal expiration were collected with bag transferred directly...
Microwave resonances between discrete macroscopically distinct quantum states with single photon and multiphoton absorption are observed in a strongly driven radio frequency superconducting interference device flux qubit. The amplitude of the resonant peaks dips modulated by power applied microwave irradiation population inversion is generated at low bias. These results, which can be addressed Landau–Zener transition, useful to develop an alternative means initialize manipulate qubit, as...
We study the multi-photon energy resolution and demonstrate photon counting up to about 30 photons at near-infrared wavelengths in a kinetic inductance detector made from aluminum (Al) film. The has lumped-element design comprising large interdigitated capacitor parallel with narrow inductive strip. A fiber-coupled lens is used focus light onto absorber minimize scattering. Detectors different designs film thicknesses are studied. From histogram of optimally filtered response pulse height,...
We present a wafer trimming technique for producing superconducting micro-resonator arrays with highly uniform frequency spacing. With the light-emitting diode mapper demonstrated previously, we first map measured resonance frequencies to physical resonators. Then, fine-tune each resonator's by lithographically small length, calculated from deviation of its design value, interdigitated capacitor. demonstrate this on 127-resonator array made titanium-nitride and show that uniformity spacing...
Abstract The inherent trade-off between efficiency and bandwidth of three-wave mixing processes in χ 2 nonlinear waveguides is the major impediment for scaling down many well-established frequency conversion schemes onto level integrated photonic circuit. Here, we show that hybridization modes a silica microfiber LiNbO 3 nanowaveguide, amalgamated with laminar patterning, offers an elegant approach engineering broadband phase matching high ultra-compact natively fiber-integrated setup. We...
A silicon (Si) grating coupler on a Si-strip-loaded lithium niobate (LN) thin film waveguide was proposed and realized. The optimized coupling efficiency (CE) by simulation −5 dB at wavelength of 1550 nm the two-dimensional finite-different time-domain method (2D-FDTD), while measured CE about −18 dB. etched focused ion beam etching (FIB) in Si strip which deposited magnetron sputtering technology, patterned photolithography lift-off process. realization tapered could benefit research more...
We present a tunable coupler scheme that allows us to tune the coupling strength between feedline and superconducting resonator in situ over wide range. In this scheme, we shunt with 50-Ω lumped-element nonlinear transmission line made from 20 nm NbTiN film. By injecting DC current, kinetic inductance changes effective impedance shunting periodically varies short an open, which tunes quality factor Qc. have demonstrated Qc tuning of 40, Qc∼5.5×104 Qc∼2.3×106, for 4.5 GHz by applying current...
Novelty lies in the attempt to connect protein changes and subsequent platelet activation surface/chemical upon thermal treatment of TiO<sub>2</sub>NP's.
Waveguides formed by etching, proton-exchange (PE), and strip-loaded on single-crystal lithium niobate (LN) thin film were designed simulated a full-vectorial finite difference method. The single-mode condition, optical power distribution, bending loss of these kinds waveguides studied compared systematically. For the PE waveguide, distributed in LN layer had negligible change with increase thickness. relationships between distribution waveguide thickness different for quasi-TE (q-TE)...