Femtosecond Polarization Switching in the Crystal of a [CrCo] Dinuclear Complex
Dr. Hikaru Kuramochi
Molecular Spectroscopy Laboratory, RIKEN, and, Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), 2-1 Hirosawa, Wako, 351-0198 Japan
JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012 Japan
Current address: Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki, 444-8585 Japan
Search for more papers by this authorGenki Aoyama
Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258 Japan
Search for more papers by this authorDr. Hajime Okajima
JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012 Japan
Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258 Japan
Search for more papers by this authorCorresponding Author
Prof. Dr. Akira Sakamoto
Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258 Japan
Search for more papers by this authorDr. Shinji Kanegawa
Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395 Japan
Search for more papers by this authorCorresponding Author
Prof. Dr. Osamu Sato
Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395 Japan
Search for more papers by this authorDr. Satoshi Takeuchi
Molecular Spectroscopy Laboratory, RIKEN, and, Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), 2-1 Hirosawa, Wako, 351-0198 Japan
Current address: Graduate School of Material Science, University of Hyogo, 3-2-1 Kohto, Kamigori, Hyogo, 678-1297 Japan
Search for more papers by this authorCorresponding Author
Prof. Dr. Tahei Tahara
Molecular Spectroscopy Laboratory, RIKEN, and, Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), 2-1 Hirosawa, Wako, 351-0198 Japan
Search for more papers by this authorDr. Hikaru Kuramochi
Molecular Spectroscopy Laboratory, RIKEN, and, Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), 2-1 Hirosawa, Wako, 351-0198 Japan
JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012 Japan
Current address: Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki, 444-8585 Japan
Search for more papers by this authorGenki Aoyama
Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258 Japan
Search for more papers by this authorDr. Hajime Okajima
JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012 Japan
Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258 Japan
Search for more papers by this authorCorresponding Author
Prof. Dr. Akira Sakamoto
Department of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258 Japan
Search for more papers by this authorDr. Shinji Kanegawa
Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395 Japan
Search for more papers by this authorCorresponding Author
Prof. Dr. Osamu Sato
Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395 Japan
Search for more papers by this authorDr. Satoshi Takeuchi
Molecular Spectroscopy Laboratory, RIKEN, and, Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), 2-1 Hirosawa, Wako, 351-0198 Japan
Current address: Graduate School of Material Science, University of Hyogo, 3-2-1 Kohto, Kamigori, Hyogo, 678-1297 Japan
Search for more papers by this authorCorresponding Author
Prof. Dr. Tahei Tahara
Molecular Spectroscopy Laboratory, RIKEN, and, Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), 2-1 Hirosawa, Wako, 351-0198 Japan
Search for more papers by this authorAbstract
Capability to control macroscopic molecular properties with external stimuli offers the possibility to exploit molecules as switching devices of various types. However, application of such molecular-level switching has often been limited by its speed and thus efficiency. Herein, we demonstrate ultrafast, photoinduced polarization switching in the crystal of a [CrCo] dinuclear complex by ultrafast pump–probe spectroscopy in the visible and mid-infrared regions. The photoinduced polarization switching was found to have a time constant of 280 fs, which makes the [CrCo] complex crystal the fastest polarization-switching material realized using the metastable state. Moreover, the pump–probe data in the visible region reveal the pronounced appearance of coherent nuclear wavepacket motion with a frequency as low as 22 cm−1, which we attribute to a lattice vibrational mode. The pronounced non-Condon effect for its resonance Raman enhancement implies that this mode couples the relevant electronic states, thereby facilitating the ultrafast polarization switching.
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