Abstract: A time-resolved photoemission electron microscopy including: a laser light source that outputs a pulse having less than or equal to a femtosecond level pulse width and variable repetition frequency; a pump light pulse generator configured to generate pump light pulse that excites photo-carriers of a sample by converting wavelength of light output from the laser light source; and a probe light pulse generator configured to generate probe light pulse that photo-emits photo-carriers excited by the pump light pulse from the sample by photoelectric effect by converting wavelength of light output from the laser light source. The energy of at least one of the pump light pulse and the probe light pulse is configured to continuously vary in a range not less than 0.1 eV and not more than 8 eV.

Abstract: A time-resolved photoemission electron microscopy including: a laser light source that outputs a pulse having less than or equal to a femtosecond level pulse width and variable repetition frequency; a pump light pulse generator configured to generate pump light pulse that excites photo-carriers of a sample by converting wavelength of light output from the laser light source; and a probe light pulse generator configured to generate probe light pulse that photo-emits photo-carriers excited by the pump light pulse from the sample by photoelectric effect by converting wavelength of light output from the laser light source. The energy of at least one of the pump light pulse and the probe light pulse is configured to continuously vary in a range not less than 0.1 eV and not more than 8 eV.

Abstract: A method for performing a phase transition of an organic complex in which the phase transition can be performed with a high performance under specific conditions and a functional element using the same are provided. When EDO-TTF-based complex crystals are irradiated with photons as weak as about 1 to about 10 ?J per square centimeter, the EDO-TTF-based complex crystals undergo a phase transition to a metal phase (high temperature phase) and an insulator phase (low temperature phase), thereby changing the reflection spectrum and the electric conductivity. Thus, the operation is performed in a wavelength region of 1.5 to 0.8 ?m with a high-sensitivity, at a high speed, and at room temperature.

Abstract: There is provided a magneto-optical recording medium and a magneto-optical recording device which greatly reduce the amount of time and light (electric) energy required for writing and reading of data while maintaining high-density recording and which can reduce the size and energy consumption of the magneto-optical recording device. The magneto-optical recording medium contains a recording layer (23) formed of a photoinduced-magnetic material thin film, and a memory layer (24) formed of a ferromagnetic thin film having perpendicular magnetic anisotropy, wherein the recording layer is subjected to photoinduced magnetization in which magnetism is produced directly through irradiation with light.

Abstract: An EL element and a laser luminescent element capable of emitting ultraviolet ray with high wave length purity. The ultraviolet electroluminescent element characterized in that: a thin film made from one of polymer and oligomer in which elements selected from Si, Ge, Sn, and Pb are directly bonded; the elements are selected from those that are the same with each other and those that are different from each other; the film is disposed between two electrodes; and at least one of the electrodes is transparent. The laser luminescent element characterized in that: a thin film made from one of polymer and oligomer in which elements selected from Si, Ge, Sn, and Pb are directly bonded is disposed between two electrodes; and the elements are selected from those that are the same with each other and those that are different from each other.

Abstract: An EL element and a laser luminescent element are capable of emitting ultraviolet rays with high wavelength purity. The ultraviolet electroluminescent element includes a thin film made from one of a polymer and an oligomer in which the elements, selected from Si, Ge, Sn, and Pb, and directly bonded. The elements selected may be the same as or different from each other. The film is disposed between two electrodes. At least one of the electrodes is transparent. The laser luminescent element includes a thin film made from one of a polymer and an oligomer in which the elements selected from Si, Ge, Sn, and Pb, are directly bonded, and is disposed between two electrodes. The elements may be the same as or different from each other.

Abstract: A target is irradiated with a laser beam having an energy of h.nu./n, where n is an integer, instead of the photon energy h.nu. 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.nu..sub.2 having a wavelength integral times longer than that of the photon energy h.nu..sub.1 necessary for a photoreaction to proceed. Photon energy h.nu..sub.2 is either used in place of the photon energy h.nu..sub.1 necessary for a photoreaction, or together with the photon energy h.nu..sub.