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Polarization and phase control of two-photon absorption in an isotropic molecular system |
Lu Chen-Hui (卢晨晖)a, Zhang Hui (张晖)b, Zhang Shi-An (张诗按)a, Sun Zhen-Rong (孙真荣)a |
a State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China; b Institute of Science, Information Engineering University, Zhengzhou 450001, China |
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Abstract We theoretically and experimentally study the polarization and phase control of two-photon absorption in an isotropic molecular system. We theoretically show that the two-photon transition probability decreases when the laser polarization changes from linear through elliptical to circular, and the laser polarization does not affect the control efficiency of two-photon transition probability by shaping the spectral phase. These theoretical results are experimentally confirmed in coumarin 480. Furthermore, we propose that the combination of the laser polarization with the spectral phase modulation can further increase the control efficiency of the two-photon absorption.
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Received: 17 February 2012
Revised: 31 May 2012
Accepted manuscript online:
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PACS:
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32.80.Qk
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(Coherent control of atomic interactions with photons)
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33.80.-b
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(Photon interactions with molecules)
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42.50.Vk
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Fund: Project partly supported by the Science Foundation of the Ministry of Education of China (Grant No. 30800), the National Natural Science Foundation of China (Grant Nos. 11004060 and 11027403), and the Shanghai Municipal Science and Technology Commission, China (Grant Nos. 10XD1401800, 09142200501, 09ZR1409300, 09JC1404700, and 10JC1404500). |
Corresponding Authors:
Zhang Shi-An
E-mail: sazhang@phy.ecnu.edu.cn
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Cite this article:
Lu Chen-Hui (卢晨晖), Zhang Hui (张晖), Zhang Shi-An (张诗按), Sun Zhen-Rong (孙真荣) Polarization and phase control of two-photon absorption in an isotropic molecular system 2012 Chin. Phys. B 21 123202
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