Research Interests

Molecular excited state is the starting point of the chemical reaction. Then, it is very important to observe such a excited state in detail for understanding the chemical reactions. To investigate the excited molecules, we apply and develop the several technique of the Doppler-free ultra-high resolution laser spectroscopy by using tunable cw ring lasers (500-1000nm) and external cavities for second harmonic generation in UV region (250-500nm).

Research Subjects

• Application and development of the ultra-high resolution laser spectroscopy
• Electronic, vibrational and rotational structure of excited molecules
• Study of the excited molecular dynamics; perturbations and predissociations

Selected Publications

◆H. Kat?, M. Baba, and S. Kasahara Bull. Chem. Soc. Jpn. 80(3), 456-463 (2007) "High Resolution Spectroscopy and the Zeeman effect on the S1←S0 transition of Benzene and Naphthalene"

◆M. Yamawaki, Y. Tatamitani, A. Doi, S. Kasahara, and M. Baba J. Mol. Spectrosc. 238(1), 49-55 (2006) "Sub-Doppler high resolution excitation spectroscopy of the S1←S0 transition of dibenzofuran"

◆D. Y. Baek, J. Chen, J. Wang, A. Doi, S. Kasahara, M. Baba, and H. Kat? Bull. Chem. Soc. Jpn. 79(1), 75-79 (2006) "Doppler-free two-photon excitation spectroscopy and the Zeeman effect in the "channel three" region of C6H6"

◆D. Y. Baek, J. Wang, A. Doi, S. Kasahara, M. Baba, and H. Kat? J. Phys. Chem. A 109(32), 7127-7133 (2005) "Doppler-free two-photon excitation spectroscopy and the Zeeman effects. Perturbations in the 1410 and 1101410 bands of the S1←S0 transition of C6D6"

◆M. Okubo, J. Wang, M. Baba, M. Misino, S. Kasahara, and H. Kat? J. Chem. Phys. 122(14). 144303 1-7 (2005) "Doppler-free two-photon excitation spectroscopy and the Zeeman effects of the S1 1B1u(v21=1)←S0 1Ag(v=0) band of naphthalene-d6"