中国物理B ›› 2010, Vol. 19 ›› Issue (4): 43201-043201.doi: 10.1088/1674-1056/19/4/043201

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Selective excitation and suppression of coherent anti-Stokes Raman scattering by shaping femtosecond pulses

张诗按, 张晖, 王祖赓, 孙真荣   

  1. State Key Laboratory of Precision Spectroscopy (East China Normal University), and Department of Physics, East China Normal University, Shanghai 200062, China
  • 收稿日期:2009-06-29 修回日期:2009-08-03 出版日期:2010-04-15 发布日期:2010-04-15
  • 基金资助:
    Project supported by Programme for Changjiang Scholars and Innovative Research Team in University (PCSIRT), Shanghai Leading Academic Discipline Project (Grant No.~B408), National Key Project for Basic Research of China (Grant Nos.~2006CB806006 and 2006CB

Selective excitation and suppression of coherent anti-Stokes Raman scattering by shaping femtosecond pulses

Zhang Shi-An(张诗按), Zhang Hui(张晖), Wang Zu-Geng(王祖赓), and Sun Zhen-Rong(孙真荣)   

  1. State Key Laboratory of Precision Spectroscopy (East China Normal University), and Department of Physics, East China Normal University, Shanghai 200062, China
  • Received:2009-06-29 Revised:2009-08-03 Online:2010-04-15 Published:2010-04-15
  • Supported by:
    Project supported by Programme for Changjiang Scholars and Innovative Research Team in University (PCSIRT), Shanghai Leading Academic Discipline Project (Grant No.~B408), National Key Project for Basic Research of China (Grant Nos.~2006CB806006 and 2006CB

摘要: Femtosecond coherent anti-Stokes Raman scattering (CARS) suffers from poor selectivity between neighbouring Raman levels due to the large bandwidth of the femtosecond pulses. This paper provides a new method to realize the selective excitation and suppression of femtosecond CARS by manipulating both the probe and pump (or Stokes) spectra. These theoretical results indicate that the CARS signals between neighbouring Raman levels are differentiated from their indistinguishable femtosecond CARS spectra by tailoring the probe spectrum, and then their selective excitation and suppression can be realized by supplementally manipulating the pump (or Stokes) spectrum with the $\pi $ spectral phase step.

Abstract: Femtosecond coherent anti-Stokes Raman scattering (CARS) suffers from poor selectivity between neighbouring Raman levels due to the large bandwidth of the femtosecond pulses. This paper provides a new method to realize the selective excitation and suppression of femtosecond CARS by manipulating both the probe and pump (or Stokes) spectra. These theoretical results indicate that the CARS signals between neighbouring Raman levels are differentiated from their indistinguishable femtosecond CARS spectra by tailoring the probe spectrum, and then their selective excitation and suppression can be realized by supplementally manipulating the pump (or Stokes) spectrum with the $\pi $ spectral phase step.

Key words: coherent anti-Stokes Raman scattering (CARS), selective excitation, selective suppression, pulse shaping

中图分类号:  (Stimulated Raman scattering; CARS)

  • 42.65.Dr
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)