Nonadiabatic multi-step excitation for the blue-green light emission from dye grains induced by the near-infrared optical near-field

作者：Fujiwara H^*; Kawazoe T; Ohtsu M

来源：Applied Physics B: Lasers and Optics , 2010, 98(2-3): 283-289.

DOI：10.1007/s00340-009-3762-y

Blue-green light emission (wavelength range: 460-520 nm) from coumarin dye grains due to near-infrared excitation (CW, lambda (ex)=808 nm), based on the nonadiabatic excitation process induced by an optical near-field, was observed. A maximum frequency up-shift of 1.17 eV was confirmed. Based on the excitation intensity dependence, a light emission mechanism originating from a nonadiabatic three-step excitation was confirmed for the first time. The lifetime of the intermediate excited state was approximately 1.1-1.9 ps, and thus realization of frequency up-conversion with a rapid response can be expected.

• 出版日期2010-2