Ze-feng Ren, Chuan-yao Zhou, Zhi-bo Ma, Chun-lei Xiao, Xin-chun Mao, Dong-xu Dai, Jerry LaRue, Russell Cooper, Alec M. Wodtke, Xue-ming Yang. A Surface Femtosecond Two-Photon Photoemission Spectrometer for Excited Electron Dynamics and Time-Dependent Photochemical Kinetics[J]. Chinese Journal of Chemical Physics , 2010, 23(3): 255-261. doi: 10.1088/1674-0068/23/03/255-261
Citation: Ze-feng Ren, Chuan-yao Zhou, Zhi-bo Ma, Chun-lei Xiao, Xin-chun Mao, Dong-xu Dai, Jerry LaRue, Russell Cooper, Alec M. Wodtke, Xue-ming Yang. A Surface Femtosecond Two-Photon Photoemission Spectrometer for Excited Electron Dynamics and Time-Dependent Photochemical Kinetics[J]. Chinese Journal of Chemical Physics , 2010, 23(3): 255-261. doi: 10.1088/1674-0068/23/03/255-261

A Surface Femtosecond Two-Photon Photoemission Spectrometer for Excited Electron Dynamics and Time-Dependent Photochemical Kinetics

doi: 10.1088/1674-0068/23/03/255-261
Funds:  This work was supported by the Chinese Academy of Sciences, the National Science Foundation of China,and the Ministry of Science and Technology of China. Jerry LaRue, Russell Cooper, Alec M.Wodtke acknowl-edge the support from US NSF PIRE-ECCI program. We wish to thank Prof. Hrvoje Petek at the University of Pittsburgh for his much helpful advice in setting up this experimental apparatus. We also want to thank Qing Guo and Chen-biao Xu for providing the TPD result of ethanol/TiO2(110).
  • Received Date: 2010-03-31
  • A surface femtosecond two-photon photoemission (2PPE) spectrometer devoted to the study of ultrafast excited electron dynamics and photochemical kinetics on metal and metal oxide surfaces has been constructed. Low energy photoelectrons are measured using a hemispheri-cal electron energy analyzer with an imaging detector that allows us to detect the energy and the angular distributions of the photoelectrons simultaneously. A Mach-Zehnder interferom-eter was built for the time-resolved 2PPE (TR-2PPE) measurement to study ultrafast surface excited electron dynamics, which was demonstrated on the Cu(111) surface. A scheme for measuring time-dependent 2PPE (TD-2PPE) spectra has also been developed for studies of surface photochemistry. This technique has been applied to a preliminary study on the photochemical kinetics on ethanol/TiO2(110). We have also shown that the ultrafast dy-namics of photoinduced surface excited resonances can be investigated in a reliable way by combining the TR-2PPE and TD-2PPE techniques.
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A Surface Femtosecond Two-Photon Photoemission Spectrometer for Excited Electron Dynamics and Time-Dependent Photochemical Kinetics

doi: 10.1088/1674-0068/23/03/255-261
Funds:  This work was supported by the Chinese Academy of Sciences, the National Science Foundation of China,and the Ministry of Science and Technology of China. Jerry LaRue, Russell Cooper, Alec M.Wodtke acknowl-edge the support from US NSF PIRE-ECCI program. We wish to thank Prof. Hrvoje Petek at the University of Pittsburgh for his much helpful advice in setting up this experimental apparatus. We also want to thank Qing Guo and Chen-biao Xu for providing the TPD result of ethanol/TiO2(110).

Abstract: A surface femtosecond two-photon photoemission (2PPE) spectrometer devoted to the study of ultrafast excited electron dynamics and photochemical kinetics on metal and metal oxide surfaces has been constructed. Low energy photoelectrons are measured using a hemispheri-cal electron energy analyzer with an imaging detector that allows us to detect the energy and the angular distributions of the photoelectrons simultaneously. A Mach-Zehnder interferom-eter was built for the time-resolved 2PPE (TR-2PPE) measurement to study ultrafast surface excited electron dynamics, which was demonstrated on the Cu(111) surface. A scheme for measuring time-dependent 2PPE (TD-2PPE) spectra has also been developed for studies of surface photochemistry. This technique has been applied to a preliminary study on the photochemical kinetics on ethanol/TiO2(110). We have also shown that the ultrafast dy-namics of photoinduced surface excited resonances can be investigated in a reliable way by combining the TR-2PPE and TD-2PPE techniques.

Ze-feng Ren, Chuan-yao Zhou, Zhi-bo Ma, Chun-lei Xiao, Xin-chun Mao, Dong-xu Dai, Jerry LaRue, Russell Cooper, Alec M. Wodtke, Xue-ming Yang. A Surface Femtosecond Two-Photon Photoemission Spectrometer for Excited Electron Dynamics and Time-Dependent Photochemical Kinetics[J]. Chinese Journal of Chemical Physics , 2010, 23(3): 255-261. doi: 10.1088/1674-0068/23/03/255-261
Citation: Ze-feng Ren, Chuan-yao Zhou, Zhi-bo Ma, Chun-lei Xiao, Xin-chun Mao, Dong-xu Dai, Jerry LaRue, Russell Cooper, Alec M. Wodtke, Xue-ming Yang. A Surface Femtosecond Two-Photon Photoemission Spectrometer for Excited Electron Dynamics and Time-Dependent Photochemical Kinetics[J]. Chinese Journal of Chemical Physics , 2010, 23(3): 255-261. doi: 10.1088/1674-0068/23/03/255-261

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