B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 19/08 (2006.01) B01J 19/12 (2006.01) C07C 5/22 (2006.01) C07F 7/08 (2006.01) C07F 7/18 (2006.01) G11C 13/04 (2006.01) G11B 7/0045 (2006.01)
Patent
CA 2137489
A target is irradiated with a laser beam having an energy of h ~/n, where n is an integer, instead of the photon energy h ~ required for a reaction to proceed using a conventional single-photon excitation method. A desired reaction is selectively induced by the absorption of multiple photons instead of single photons. It is thus possible to induce a photoreaction in which an absorption is carried out in accordance with a selection theory different from that of single-photon absorption, and which is quite different from a photoreaction induced by a single-photon excitation. Namely, a target or reactant is irradiated with a photon energy h ~2 having a wavelength integral times longer than that of the photon energy h ~1 necessary for a photoreaction to proceed. Photon energy h ~2 is either used in place of the photon energy h ~1 necessary for a photoreaction, or together with the photon energy h ~1, to thereby make the reactant absorb the energy equal to the photon energy h ~1, The method is capable of selectively and preferentially inducing a specific photoreaction among various possible, concurrent photoreactions.
Kira Mitsuo
Koshihara Shinya
Miyazawa Takashi
Segawa Yusaburo
Dennison Associates
Kenkyusho Rikagaku
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