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Optica Publishing Group
  • CLEO/Europe and IQEC 2007 Conference Digest
  • (Optica Publishing Group, 2007),
  • paper CG5_4

Visualization of Vibrational Wave Packet via Coulomb Explosion in Poly-Atomic Molecules

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Abstract

The visualization and manipulation of a quantum wave function, which evolves in time, is one of the most fundamental challenges in atomic, molecular, and optical physics. For the case of dissociating molecules, a direct method of mapping both the structure and the dynamics of vibrational wave packet was proposed by a combination of the Coulomb explosion imaging technique and femtosecond pump-probe experiment [1]. Recently, this scheme has been applied for real-time imaging of evolution of ultrafast nuclear wave packets of the simplest diatomic molecules (H2 and D2) [2]. In this study, we apply the time-resolved Coulomb explosion imaging to visualize the vibrational wave packet of dissociating poly-atomic molecules such as C2H5OH (ethanol) or CH3(CH2)2OH (1-propanol). It enables us to understand fundamental insight of complex multi-dimensional quantum evolution of the large molecular systems.The experiment was performed using intense pump-probe laser pulses with a 25 nm spectral width at 800 nm center wavelength. The field intensity and temporal width of both the pump and probe pulses is 2.0×l014 W/cm2 and 40fs, respectively. The pump-probe pulses were focused into the collimated molecular beam in a TOF mass spectrometer.

© 2007 IEEE

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