Nonadiabatic photodissociation process using an optical near field |
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Authors: | Kawazoe Tadashi Kobayashi Kiyoshi Takubo Satoru Ohtsu Motoichi |
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Institution: | SORST, Japan Science and Technology Agency, 687-1 Tsuruma, Machida, Tokyo 194-0004, Japan. kawazoe@ohtsu.jst.go.jp |
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Abstract: | We demonstrated the deposition of nanometric Zn dots using photodissociation with gas-phase diethylzinc and an optical near field under nonresonant conditions. To explain the experimental results, we proposed an exciton-phonon polariton model, and discuss the quantitative experimental dependence of the deposition rate on the optical power and photon energy based on photodissociation involving multiple-step excitation via molecular vibration modes. The physical basis of this process, which seems to violate the Franck-Condon principle, is the optically nonadiabatic excitation of the molecular vibration mode due to the steep spatial gradient of the optical near-field energy. |
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