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| 1 | Sub-10-fs pulse generation directly from a KLM Ti: sapphire laser显示文摘By reducing the effects of frequency dependent mode size and intracavity gain saturation of a KLM Ti: sapphire laser, the pulse bandwidth broadening is enhanced significantly. 8.5 fs pulses with the bandwidth of 92 nm at wavelength of 710 nm have been generated directly from this laser and measured with an extracavity group velocity dispersion compensation system. | Weizhu Lin Rui Liao Jinhui Wen Zhigang Liu Li Deng Haichao Zhang Tianshu Lai | 2002 | Chinese Science Bulletin2002，47，12： | 5 |
| 2 | The density matrix picture of laser coherent control current显示文摘The physical substance of the coherent control current and the optical rectification have been analyzed based on density matrix perturbation theory. The analytical results demonstrate that they arise from the real and virtual manifestations of the same nonlinear process associated with diagonal and non-diagonal density matrix. And in terms of polarization, they respectively arise from the intraband and interband polarizations. Both the evolution of the coherent control current exited by ultrafast laser pulse and its dependence on frequency have been studied in time and frequency domains. In order to get an explicit knowledge of intraband polarization and the origination of the coherent control current, we have investigated the initial photo-carriers momentum distribution. The ultrafast decay of the polar momentum population in order of tens of femtosends is given to illustrate its instantaneous optical response. | SHOU Qian ZHANG Haichao LIU Luning LIN Weizhu | 2004 | Science China(Physics,Mechanics & Astronomy)2004，47，2： | 3 |
| 3 | Femtosecond Studies on Third-Order Optical Nonlinearities of Polyanilines显示文摘The ultrafast dynamics of third order nonlinearities of polyaniline(PAn)and polyaniline doped in polymethyl mathacrylate(PAn-PMMA)films are investigated using femtosecond absorption spectroscopy.An ultrafast initial exciton deformation time of about 100fs is observed in PAn film.In PAn-PMMA film,the third-order nonlinearity results in an efficient two-photon absorption at about 2eV. | WANG Hui LAI Tianshu LIN Weizhu MO Dang OUYANG Meng GONG Kecheng | 1994 | Chinese Physics Letters1994，11，8： | 2 |
| 4 | Catalytic distil- lation for simultaneous hydrolysis of methyl acetate and etheri cat- ion of methanol显示文摘 | Christina B D An Weizhu Lin Tzongbin | 2009 | Chemical Engineering and Processing2009，48，： | 1 |
| 5 | Effects of cavity-dispersion noncoaxiality on the generation of ultrabroadband femtosecond pulses显示文摘The effects of cavity-dispersion noncoaxiality (CDN) on the generation of ultrabroadband femtosecond pulses in KLM Ti:sapphire laser were investigated theoretically and experimentally. It was predicted that when the laser sub-cavity works near the coaxial operation point, the limitation of CDN on the bandwidth broadening is minimum, which is favorable for ultrabroadband pulse generation. On the basis of this prediction, femtosecond pulses with bandwidth of 650 to 1000 nm were directly generated from a home built KLM Ti:sapphire laser. To our knowledge, they are the broadest bandwidth pulses produced from KLM Ti:sapphire laser with similar oscillator configuration and gain crystal length of 3 mm. | JIAO ZhongXing LEI Liang HUANG ZhiLing WEN dinHui LAI Tianshu LIN WeiZhu | 2008 | Chinese Science Bulletin2008，53，5： | 1 |
| 6 | TRANSIENT PHOTOLUMINESCENCE SPECTRA OF GaAs/AlGaAs QUANTUM WELLS, QUANTUM WELL WIRES, AND QUANTUM WELL BOXES显示文摘The interaction of the electrons with the phonons in GaAs/AlGaAs quantum wells,quantum well wires,and quantum well boxes has been studied by meansuring their time resolved photoluminescence(PL)spectra.In the quantum well(Q W)system,relaxation time of the electron energy of the narrower well is shorter than that of the wider well.It is attributed to the stronger interaction of the electrons with the interface mode phonons.In the Q W wires and Q W boxes,the shortening of the relaxation time is obvious.It is due to the stronger electron-phonon interaction caused by the reduction of screening effect.Our experiments also demonstrated the incident laser intensity dependence of the relaxation time. | CHENG Wenqin HUANG Yi ZHOU Junming FENG Wei WANG Hezhou SHE Weilong HUANG Xuguang LIN Weizhu YU Zhenxin XU Geng | 1990 | Chinese Physics Letters1990，7，6： | 0 |
| 7 | Femtosecond Spectroscopy Studies on YBa_(2)Cu_(3)O_(7-x) and PrBa_(2)Cu_(3)O_(7-x) a Epitaxial Thin Films显示文摘We report the results of femtosecond spectroscopy studies on YBa_(2)Cu_(3)O_(7-x )and PrBa_(2)Cu_(3)O_(7-x )(x=0.1)epitaxial thin films at room temperature.The transient reSectivity signals ΔR(t)in the samples are consistent with a band filliitg model.The relaxation times of ΔR(t)in YBa_(2)Cu_(3)O_(7-x ) increase from less th&n 100 fs to more than Ips with increasing x and with substitution of Pr for Y.These results reveal that in high Tc superconductors decrease of carrier concentration slows down the carrier-phonon coupling. | ZENG Wensheng LIN Weizhu ZHU Derui PI Feipeng XU Geng MO Dang XIA Zongju ZOU Yinghua WANG Jingjing YUAN Ping XIONG Guangcheng GAN Zizhao | 1993 | Chinese Physics Letters1993，10，12： | 0 |
| 8 | Large Stable Photoinduced Anisotropy and Optical Information Storage in Poly [4-bis (N, N-oxyethylene) imino-4- nitroasobenzene Succinyl] Film by Two-Wave Mixing显示文摘Optical information storage caused by photoinduced anisotropy in poly[4'-bis(N,N-oxyethylene)imino-4-nitroazobenzene succinyl]film is studied by two-wave mixing.Using Nd:YAG second-harmonic pulses(100ps),grating of orientation of azobenzene molecules is formed in the film by photoinduced anisotropy.Up to third-order diffraction was observed.After turning off one of the two pump lights,the signals remained.When the weaker one of two pump lights was turned off,the intensities of diffraction beams of another pump light almost did not decrease.The information recorded in the film can be 100%maintained for a long time(monitored over 100 days without obvious decrease). | WEI Xiong YAN Xingzhong LIN Weizhu MO Dang LIANG Zhaoxi | 1995 | Chinese Physics Letters1995，12，12： | 0 |
| 9 | Foliar application of a mixture of putrescine,melatonin,proline,and potassium fulvic acid alleviates high temperature stress of cucumber plants grown in the greenhouse显示文摘Putrescine(Put),melatonin(MT),proline(Pro),and potassium fulvic acid(MFA)are widely used as plant growth regulators to enhance stress tolerance.However,the roles of their mixtures in response to stress are largely unknown.Here,we mixed Put with MT,Pro,and MFA(hereafter referred to as Put mixture)with different concentrations and foliar sprayed at different growth stages(seedling,flowering,and fruiting stage)of cucumber(Cucumis sativus L.)to investigate their roles on plant growth,fruit yield,and quality under high temperature stress.The foliar application of the Put mixture promoted cucumber growth,increased chlorophyll and Pro contents and net photosynthesis rate,and reduced the values of relative electrolyte leakage,H_(2)O_(2)and malondialdehyde contents of cucumber leaves,indicating that treatment with Put mixture reduced the oxidative stress caused by high temperature.Furthermore,Put mixture-treated cucumber plants had lower fruit deformity rate and higher fruit yield compared with control.The contents of vitamin C and soluble solids of cucumber fruit significantly increased and the contents of tannin and organic acid decreased.The most profound effects were found in the plants treated with 8 mmol L^(−1)Put,50μmol L^(−1)MT,1.5 mmol L^(−1)Pro and 0.3 g L^(−1)MFA every 7 d,three times at the seedling stage,indicating that cucumber seedlings treated with the mixture of Put,MT,Pro,and MFA significantly alleviated the negative effects of high temperature stress. | Yu Wang Hongyun Liu Weizhu Lin Mohammad Shah Jahan Jian Wang Jin Sun Jiankang Jiang Weiyong Gu Jiarong Zou Sheng Shu Shirong Guo | 2022 | Technology in Horticulture2022，2，1： | 0 |
| 10 | Crystal structure and catalytic mechanism of the MbnBC holoenzyme required for methanobactin biosynthesis显示文摘Methanobactins(Mbns)are a family of copper binding peptides involved in copper uptake by methanotrophs,and are potential therapeutic agents for treating diseases characterized by disordered copper accumulation.Mbns are produced via modification of MbnA precursor peptides at cysteine residues catalyzed by the core biosynthetic machinery containing MbnB,an iron-dependent enzyme,and MbnC.However,mechanistic details underlying the catalysis of the MbnBC holoenzyme remain unclear.Here,we present crystal structures of MbnABC complexes from two distinct species,revealing that the leader peptide of the substrate MbnA binds MbnC for recruitment of the MbnBC holoenzyme,while the core peptide of MbnA resides in the catalytic cavity created by the MbnB-MbnC interaction which harbors a unique tri-iron cluster.Ligation of the substrate sulfhydryl group to the tri-iron center achieves a dioxygen-dependent reaction for oxazolone thioamide installation.Structural analysis of the MbnABC complexes together with functional investigation of MbnB variants identifed a conserved catalytic aspartate residue as a general base required for MbnBC-mediated MbnA modifcation.Together,our study reveals the similar architecture and function of MbnBC complexes from different species,demonstrating an evolutionarily conserved catalytic mechanism of the MbnBC holoenzymes. | Chao Dou Zhaolin Long Shoujie Li Dan Zhou Ying Jin Li Zhang Xuan Zhang Yanhui Zheng Lin Li Xiaofeng Zhu Zheng Liu Siyu He Weizhu Yan Lulu Yang Jie Xiong Xianghui Fu Shiqian Qi Haiyan Ren She Chen Lunzhi Dai Binju Wang Wei Cheng | 2022 | Cell Research2022，32，3： | 0 |
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