Sub-cycle steering of the deprotonation of acetylene by intense few-cycle mid-infrared laser fields

作者：Li, H.; Kling, Nora G.; Gaumnitz, T.; Burger, C.; Siemering, R.; Schoetz, J.; Liu, Q.; Ban, L.; Pertot, Y.; Wu, J.; Azzeer, A. M.; de Vivie-Riedle, R.; Worner, H. J.; Kling, M. F.^*

来源：Optics Express, 2017, 25(13): 14192-14203.

DOI：10.1364/OE.25.014192

• DISSOCIATIVE IONIZATION
• DEPENDENCE
• PHASE

Directional breaking of the C-H/C-D molecular bond is manipulated in acetylene (C2H2) and deuterated acetylene (C2D2) by waveform controlled few-cycle mid-infrared laser pulses with a central wavelength around 1.6 mu m at an intensity of about 8 x 10(13) W/cm(2). The directionality of the deprotonation of acetylene is controlled by changing the carrier-envelope phase (CEP). The CEP-control can be attributed to the laser-induced superposition of vibrational modes, which is sensitive to the sub-cycle evolution of the laser waveform. Our experiments and simulations indicate that near-resonant, intense mid-infrared pulses permit a higher degree of control of the directionality of the reaction compared to those obtained in near-infrared fields, in particular for the deuterated species.

• 单位
  精密光谱科学与技术国家重点实验室; 华东师范大学