We theoretically investigate the nonresonant two-photon absorption (TPA) process in a two-level atom induced by a weak chirped pulse in the frequency domain. According to the extremum condition of the two-photon transition probability (TPTP) at the transition center frequency, we propose a Fresnel-inspired pulse tailoring scheme for TPA that is significantly different from that of Broers et al. [Phys. Rev. A 46, 2749 (1992)]. Using this scheme, the TPTP can be focused or eliminated completely by constructively or destructively modulating various pathways of the quantum interference. Our results are a significant improvement on those obtained by Broers et al. and will have potential applications in selective two-photon microscopy and spectroscopy.
© 2014 Optical Society of America
Original Manuscript: January 30, 2014
Revised Manuscript: March 7, 2014
Manuscript Accepted: March 18, 2014
Published: April 11, 2014
Baihong Li, Yonggang Xu, Lan An, Qianlan Lin, Haifei Zhu, Fukun Lin, and Yongfang Li, "Quantum focusing and coherent control of nonresonant two-photon absorption in frequency domain," Opt. Lett. 39, 2443-2446 (2014)