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Chinese Optics Letters 2021年第12期19卷 110-115页

作者：陈功朱嘉哲李晓光 School of Physics Zhengzhou UniversityZhengzhou 450052China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Institute for Advanced Study Shenzhen UniversityShenzhen 518060China

In this Letter,we use electromagnetic simulations to systematically investigate the influence of a thin dielectric layer on the local electric field and molecular spectroscopy in the plasmonic *** is found that both the intensity and spatial confinement of the electric field and molecular spectroscopy can be significantly enhanced by applying a dielectric layer with large dielectric *** also discuss the optimal dielectric layer thickness to obtain the largest quantum efficiency of a dipole *** results may be instructive for further studies in molecular spectroscopy and optoelectronics in plasmonic junctions.

关键词： plasmonics decoupling layer scanning tunneling microscope molecular spectroscopy tip-enhanced spectroscopy

Scanning dual-microcomb spectroscopy

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Science China(Physics,Mechanics & Astronomy) 2022年第9期65卷 65-71页

作者： Yang Wang Zhichuang Wang Xinyu Wang Wen Shao Long Huang Bo Liang Brent ELittle Sai TChu Wei Zhao Weiqiang Wang Wenfu Zhang State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi’an 710119China University of Chinese Academy of Sciences Beijing 100049China Department of Physics and Materials Science City University of Hong KongHong Kong 999077China

Dual-comb spectroscopy(DCS) is a powerful tool in molecular spectroscopy benefiting from the advantages of high resolution and short measurement time. The recently developed soliton microcomb(SMC) can potentially transfer the dual-comb method to an on-chip platform. In this paper, we demonstrate DCS using two frequency scanning SMCs, termed scanning dual-microcomb spectroscopy(SDMCS). The two SMCs are generated by an auxiliary-assisted thermal balance scheme, and the pump laser frequency sweeps over one free spectral range of the microresonator(~49 GHz) using a feedback control system. The proposed SDMCS has a spectral resolution of 12.5 MHz, which is determined by the minimum sweeping step of the pump laser. Using this SDMCS system, we perform three types of gas molecule absorption spectroscopy recognition and gas concentration *** study paves the way for integrated DCS with a high signal-to-noise ratio, high spectral resolution, and fast acquisition rate.

关键词： microresonator soliton microcomb dual-comb spectroscopy molecular spectroscopy gas sensing

Precise measurement of the line width of the photoassociation spectra of ultracold molecules by using a frequency shifter

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Chinese Physics B 2012年第9期21卷 224-228页

作者：武寄洲马杰姬中华张一驰李玉清汪丽蓉赵延霆肖连团贾锁堂 State Key Laboratory of Quantum Optics and Quantum Optics Devices Laser Spectroscopy LaboratoryCollege of Physics and Electronic EngineeringShanxi University

We propose a technique to precisely measure the line width of the photoassociation spectra of the excited cesium molecule by using a frequency shifter to generate two laser beams with a precise frequency difference. A series of photoassociation （PA） spectra are recorded with two laser beam induced molecular lines, whose peak separation serves as an accurate frequency ruler to measure the line width of the PA spectra. The full width half maximum line width was studied as a function of PA laser intensity. The extrapolated value at zero laser intensity is （34.8± 0.22） MHz. By analyzing other broadening mechanisms, a value of （32.02 ± 0.70） MHz was deduced. It is shown that this scheme is inexpensive, simple, robust, and is promising for applications in a variety of other atomic species.

关键词： laser cooling molecular spectroscopy line shapes and width

Wavelength modulation spectroscopy based on quasi-continuous-wave diode lasers

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Chinese Optics Letters 2012年第3期10卷 77-79页

作者：齐汝宾杜振辉高东宇李金义徐可欣 State Key Laboratory of Precision Measuring Technology and Instruments Tianjin University

A modified wavelength modulation spectroscopy（WMS）based on the self-heating effect of the tunable diode laser when driven in quasi-continuous-wave（QCW）mode is investigated.A near-infrared distributed feedback（DFB）diode laser working at the QCW mode is employed as the QCW light source,and CO2 is selected as the target *** characteristic of the QCW second harmonic（2f）line profile is analyzed through a comparison with that of the traditional CW WMS with the same system.A noise-equivalent absorbance of 3.2×10-5 Hz-1/2 for CO2 at 1.58μm is obtained with 18-m optical *** QCW WMS lowers the dependence on lasers and expands selectivity,thus verifying the feasibility of the method.

关键词： Carbon dioxide Light sources molecular spectroscopy

Novel method for correcting light intensity fluctuation in the TDLAS system

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Chinese Optics Letters 2012年第4期10卷 70-73页

作者：涂郭结王煜董凤忠夏滑庞涛张志荣吴边 Anhui Provincial Key Laboratory of Photonic Devices and Materials Anhui Institute of Optics and Fine MechanicsChinese Academy of Sciences

A novel method for online correction of light intensity fluctuation in a practical tunable diode laser ab-sorption spectroscopy（TDLAS）system with wavelength modulation is *** proposed method is developed according to the linear relation between peaks at multiple frequencies of sine modulation in the power spectral density of the demodulated second-harmonic（2f）signal and the incident light *** peaks are demonstrated experimentally and explained as residual power at the first-harmonic and third-harmonic frequencies after 2f demodulation of the residual amplitude modulation signal due to the limited integrating time constant of the *** method can achieve real-time correction of light intensity fluctuations with only little *** can work well in a very large range of light intensity and has great potential applications in the wavelength modulation spectroscopy system.

关键词： molecular spectroscopy Power spectral density

Adaptive-sampling near-Doppler-limited terahertz dual-comb spectroscopy with a free-running single-cavity fiber laser

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Advanced Photonics 2020年第3期2卷 50-60页

作者： Jie Chen Kazuki Nitta Xin Zhao Takahiko Mizuno TakeoMinamikawa Francis Hindle Zheng Zheng Takeshi Yasui Beihang University School of Electronic and Information EngineeringBeijingChina Tokushima University Graduate School of Advanced Technology and ScienceTokushimaJapan JST ERATO MINOSHIMA Intelligent Optical SynthesizerTokushimaJapan Tokushima University Institute of Post-LED PhotonicsTokushimaJapan Tokushima University Graduate School of TechnologyIndustrial and Social SciencesTokushimaJapan Tokushima University Research Cluster on“Multi-scale VibrationalMicroscopy forComprehensive Diagnosis and Treatment of Cancer”TokushimaJapan Universitédu Littoral Côte d’Opale Laboratoire de Physico-Chimie de l’AtmosphèreDunkerqueFrance Beihang University Beijing Advanced Innovation Center for Big Data-based Precision MedicineBeijingChina

Dual-comb spectroscopy(DCS)is an emerging spectroscopic tool with the potential to simultaneously achieve a broad spectral coverage and ultrahigh spectral resolution with rapid data ***,the need for two independently stabilized ultrafast lasers significantly hampers the potential application of *** demonstrate mode-resolved DCS in the THz region based on a free-running singlecavity dual-comb fiber laser with the adaptive sampling *** the use of a free-running single-cavity dual-comb fiber laser eliminates the need for two mode-locked lasers and their frequency control,the adaptive sampling method strongly prevents the degradation of spectroscopic performance caused by the residual timing jitter in the free-running dual-comb ***-limit-approaching absorption features with linewidths down to 25 MHz are investigated for low-pressure acetonitrile/air mixed gas by comb-mode-resolved THz *** successful demonstration clearly indicates its great potential for the realization of lowcomplexity,Doppler-limited THz spectroscopy instrumentation.

关键词： optical comb terahertz dual-comb spectroscopy molecular spectroscopy

Spectroscopic study on the interaction between[Hg(SCN)_4]^(2-) and hemoglobin

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Chinese Chemical Letters 2012年第11期23卷 1283-1286页

作者： Lun Fu Tian Zhong Fang Liu Ling Kong Xiao Li Hu Shao Pu Liu Education Ministry Key Laboratory on Luminescence and Real-Time Analysis School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China Institute of Mechanical Manufacturing Technology Chinese Academy of Engineering PhysicsMianyang 621900China

The interaction between [Hg（SCN）4]^2- and hemoglobin （Hb） under conditions that simulate a physiological environment was investigated by UV-vis spectroscopy, fluorescence spectroscopy, resonance Rayleigh scattering （RRS） spectroscopy and circular dichroism （CD） spectroscopy. The results obtained from the change of UV-vis and CD spectra, the quenching of Hb fluorescence and the enhancement of RRS intensity proved that a 10：1 type complex was formed between [Hg（SCN）4]^2- and Hb. The possible mechanism suggested for the interaction was that ten Hg（SCN）4]^2- anions entered the four subunits of a Hb molecule to react with some residues to form an adduct by coordination and electrostatic forces. The coordination of [Hg（SCN）4]^2- with Trp was the major cause of the fluorescence quenching of Hb.

关键词： [Hg(SCN)4]^2- Hemoglobin Toxicological evaluation molecular spectroscopy

Spectroscopic calculation of asymmetric top free radicals: method and program

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Progress in Natural Science:Materials International 2001年第2期 22-30页

作者：刘效庸刘红平郭远清黄光明林洁丽高晖段传喜刘煜炎 Central China Normal University China China Department of Physics China Department of Physics Chinese Academy of Sciences East China Normal University Shanghai 200062 State Key Laboratory of Magnetic Resonance and Atomic and molecular Physics Wuhan 430071 Wuhan 430079 Wuhan Institute of Physics and Mathematics

This paper sketches out the effective Hamiltonian and basis set adopted in the spectroscopic calculation of asymmetric top free radicals, and details the machine implementation of the spectral analysis of asymmetric top free radicals, the design and usage of the program package. To demonstrate the application of this program, analyses have been performed on the far infrared laser magnetic resonance spectrum of 14N16O2( / = 1) and the infrared diode laser spectrum of the v3 band of PO2( / = 1/2) using the program.

关键词： asymmetric top free radicals molecular spectroscopy theoretical calculation.

Tuning molecular Electroluminescence at the Nanoscale

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Tuning Molecular Electroluminescence at the Nanoscale

中国化学会第27届学术年会

作者：董振超 Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China

＜正＞Control of radiative properties of functional polyatomic molecules near metals is a key issue in nanooptics, important for energy transfer and light manipulation at the nanoscale and the development of molecular

关键词： Porphyrin Electroluminescence molecular spectroscopy Surface Plasmons.

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贝加因和β-淀粉样蛋白相互作用的光谱研究

贝加因和β-淀粉样蛋白相互作用的光谱研究