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Electrophoretic deposition of graphene-based materials:A review of materials and their applications

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Journal of Materiomics 2018年第2期4卷 108-120页

作者： Yifei Ma Jiemin Han Mei Wang Xuyuan Chen suotang jia State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyCollaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuanShanxi 030006China Department of Micro-and Nanosystem Technology Faculty of Technology and Maritime SciencesUniversity College of Southeast Norway3184 BorreNorway

Recently,graphene-based materials have been successfully fabricated by the electrophoretic deposition(EPD)technique and exhibited various extraordinary ***,research progress of the field of graphene-based materials prepared by the EPD process in recent 5 years is reviewed,including graphene films,graphene/non-metal composites,graphene/metal-based nanoparticles composites,graphene/polymer *** also summarize the experimental deposition conditions and the applications of the deposited graphene-based materials that have been *** can be concluded that EPD is a simple and reliable manipulation technique and promises a bright future for the production of graphenebased materials in the field of advanced nanocomposite *** the current issues and outlook of the development direction of EPD in future are also proposed.

关键词： Electrophoretic deposition Graphene Graphene-based composite materials Applications

Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy

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Light(Science & Applications) 2024年第4期13卷 696-705页

作者： jiapeng Wang Hongpeng Wu Angelo Sampaolo Pietro Patimisco Vincenzo Spagnolo suotang jia Lei Dong State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China. Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China. PolySense Lab Dipartimento Interateneo di FisicaUniversity and Politecnico of BariCNR-IFNVia Amendola 17370126 BariItaly

The extension of dual-comb spectroscopy(DCS)to all wavelengths of light along with its ability to provide ultralarge dynamic range and ultra-high spectral resolution,renders it extremely useful for a diverse array of applications in physics,chemistry,atmospheric science,space science,as well as medical *** this work,we report on an innovative technique of quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy(QEMR-PAS),in which the beat frequency response from a dual comb is frequency down-converted into the audio frequency *** this way,gas molecules act as an optical-acoustic converter through the photoacoustic effect,generating heterodyne sound *** conventional DCS,where the light wave is detected by a wavelengthdependent photoreceiver,QEMR-PAS employs a quartz tuning fork(QTF)as a high-Q sound transducer and works in conjunction with a phase-sensitive detector to extract the resonant sound component from the multiple heterodyne acoustic tones,resulting in a straightforward and low-cost hardware *** novel QEMRPAS technique enables wavelength-independent DCS detection for gas sensing,providing an unprecedented dynamic range of 63 dB,a remarkable spectral resolution of 43 MHz(or~0.3 pm),and a prominent noise equivalent absorption of 5.99×10^(-6)cm^(-1)·Hz-1/2.

关键词： Quartz hardware resonant

Research on ultracold cesium molecule long-range states by high-resolution photoassociative spectroscopy

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Science China(Physics,Mechanics & Astronomy) 2008年第2期51卷 147-156页

作者： WANG LiRong MA Jie JI WeiBang WANG GuiPing XIAO LianTuan jia suotang State Key Laboratory of Quantum Optics and Quantum Optics Devices College of Physics and Electronics EngineeringShanxi UniversityTaiyuan 030006China

In this paper, an ultra-high resolution photoassociation spectroscopy study on photoassociation of cesium atoms is reported. The cold cesium gas in the mag-neto-optical trap is illuminated by a photoassociation laser with red-tuning as large as 40 cm?1 below the 6S1/2 + 6P3/2 dissociation limit, and the photoassociation to the excited state ultracold molecule is detected. High signal-to-noise ratio is obtained by using the lock-in detection of the fluorescence from the modulated cold Cs at-oms. The 0g?, 1g and 0u+ long-range states which correspond to 6S1/2 + 6P3/2 dissocia-tion limit are present in the photoassociation spectrum. The effective coefficients of leading long-range interactions and the corresponding vibrational quantum num-ber are obtained using LeRoy-Bernstein Law. It is found that photoassociation process creates rotating molecules and the high J value is a hint that higher partial waves participate in the PA process in the presence of trapping laser.

关键词： ultracold molecule photoassociation high-resolution spectrum

Photonic graphene with reconfigurable geometric structures in coherent atomic ensembles

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Frontiers of physics 2023年第5期18卷 217-225页

作者： Fuqiang Niu Hengfei Zhang Jinpeng Yuan Liantuan Xiao suotang jia Lirong Wang State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Photonic graphene,possesses a honeycomb-like geometric structure,provides a superior platform for simulating photonic bandgap,Dirac physics,and topological ***,the photonic graphene with reconfigurable geometric structures is demonstrated in a 5S_(1/2)–5P_(3/2)–5D_(5/2) cascade-type 85Rb atomic ensembles.A strong hexagonal-coupling field,formed by the interference of three identical coupling beams,is responsible for optically inducing photonic graphene in atomic *** incident weak probe beam experiences discrete diffraction,and the observed pattern at the output plane of vapor cell exhibits a clear hexagonal intensity *** complete photonic graphene geometries from transversely stretched to longitudinally stretched are conveniently constructed by varying the spatial arrangement of three coupling beams,and the corresponding diffraction patterns are implemented theoretically and experimentally to map these distorted geometric ***,the distribution of lattice sites intensity in photonic graphene is further dynamically adjusted by two-photon detuning and the coupling beams *** work paves the way for further investigation of light transport and graphene dynamics.

关键词： atomic ensembles photonic graphene geometric structures discrete diffraction

Vapor cell geometry effect on Rydberg atom-based microwave electric field measurement

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Chinese Physics B 2018年第3期27卷 104-107页

作者： Linjie Zhang jiasheng Liu Yue jia Hao Zhang Zhenfei Song suotang jia Institute of Laser Spectroscopy State Key Laboratory of Quantum Optics and Quantum Optics DevicesShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China National Institute of Metrology Beijing 100029China

The geometry effect of a vapor cell on the metrology of a microwave electric field is investigated. Based on the splitting of the electromagnetically induced transparency spectra of cesium Rydberg atoms in a vapor cell, high-resolution spatial distribution of the microwave electric field strength is achieved for both a cubic cell and a cylinder cell. The spatial distribution of the microwave field strength in two dimensions is measured with sub-wavelength resolution. The experimental results show that the shape of a vapor cell has a significant influence on the abnormal spatial distribution because of the Fabry-P6rot effect inside a vapor cell. A theoretical simulation is obtained for different vapor cell wall thicknesses and shows that a restricted wall thickness results in a measurement fluctuation smaller than 3% at the center of the vapor cell.

关键词： Rydberg atom microwave electric field strength electromagnetically induced transparency (EIT) Aulter-Towns splitting

Testing universality of Feynman-Tan relation in interacting Bose gases using high-order Bragg spectra

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Light(Science & Applications) 2023年第3期12卷 409-414页

作者： Yunfei Wang Huiying Du Yuqing Li Feng Mei Ying Hu Liantuan Xiao Jie Ma suotang jia State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuanChina Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanChina Hefei National Laboratory HefeiChina

The Feynman-Tan relation,obtained by combining the Feynman energy relation with the Tan’s two-body contact,can explain the excitation spectra of strongly interacting 39K Bose-Einstein condensate(BEC).Since the shift of excitation resonance in the Feynman-Tan relation is inversely proportional to atomic mass,the test of whether this relation is universal for other atomic systems is significant for describing the effect of interaction in strongly correlated Bose *** we measure the high-momentum excitation spectra of 133Cs BEC with widely tunable interactions by using the second-and third-order Bragg *** observe the backbending of frequency shift of excitation resonance with increasing interaction,and even the shift changes its sign under the strong interactions in the high-order Bragg *** finding shows good agreement with the prediction based on the Feynman-Tan *** results provide significant insights for understanding the profound properties of strongly interacting Bose gases.

关键词： spectra. Feynman relation

Atom-optically synthetic gauge fields for a noninteracting Bose gas

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Light(Science & Applications) 2022年第3期11卷 15-21页

作者： Yuqing Li jiahui Zhang Yunfei Wang Huiying Du Jizhou Wu Wenliang Liu Feng Mei Jie Ma Liantuan Xiao suotang jia State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanShanxi030006China

Synthetic gauge fields in synthetic dimensions are now of great *** concept provides a convenient manner for exploring topological phases of ***,we report on the first experimental realization of an atom-optically synthetic gauge field based on the synthetic momentum-state lattice of a Bose gas of ^(133)Cs atoms,where magnetically controlled Feshbach resonance is used to tune the interacting lattice into noninteracting ***,we engineer a noninteracting one-dimensional lattice into a two-leg ladder with tunable synthetic gauge *** observe the flux-dependent populations of atoms and measure the gauge field-induced chiral currents in the two *** also show that an inhomogeneous gauge field could control the atomic transport in the *** results lay the groundwork for using a clean noninteracting synthetic momentum-state lattice to study the gauge field-induced topological physics.

关键词： gauge interacting synthetic

Highly sensitive detection of Rydberg atoms with fluorescence loss spectrum in cold atoms

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Chinese Physics B 2020年第1期29卷 218-222页

作者： Xuerong Shi Hao Zhang Mingyong Jing Linjie Zhang Liantuan Xiao suotang jia State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Fluorescence loss spectrum for detecting cold Rydberg atoms with high sensitivity has been obtained based on lock-in detection of fluorescence of 6 P3/2 state when cooling lasers of the magneto-optical trap are *** experiment results show that the signal to noise ratio has been improved by 32.64 dB when the modulation depth(converted to laser frequency)and frequency are optimized to 4 MHz and 6 kHz,*** technique enables us to perform a highly sensitive non-destructive detection of Rydberg atoms.

关键词： fluorescence loss spectrum Rydberg atoms signal to noise ratio

Wide and fast-frequency tuning for a stabilized diode laser

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Frontiers of physics 2022年第2期17卷 1-5页

作者： Yunfei Wang Yuqing Li Jizhou Wu Wenliang Liu Peng Li Yongming Fu Jie Ma Liantuan Xiao suotang jia State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyCollege of Physics and Electronics EngineeringShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China College of Physics and Electronic Engineering Shanxi UniversityTaiyuan 030006China

External-cavity diode laser(ECDL)has important applications in many fundamental and applied *** we report a method to fast and widely tune the frequency of a stabilized *** beat frequency between the ECDL and a frequency-locked reference laser is identified by the voltagecontrolled oscillator contained in a phase detector,whose output voltage is subtracted from the flexibly controlled PC signal to generate an error signal for stabilizing the *** output frequency of the stabilized ECDL can be shifted at a short characteristic time of∼150µs within a range of∼620 *** wide and fast-frequency tuning achieved by our method is compared with other previous *** demonstrated the performance of our method by the efficient sub-Doppler cooling of Cs atoms with the temperature as low as 6µK.

关键词： external-cavity diode laser frequency stabilization laser cooling interaction of laser with atoms