PHOTONIC CRYSTAL LASER
    16.
    发明申请

    公开(公告)号:US20200028322A1

    公开(公告)日:2020-01-23

    申请号:US16488998

    申请日:2018-02-27

    Abstract: A photonic crystal laser 10 is a laser that has a configuration, in which a light emitting layer (an active layer 12) that generates light including light of wavelength λL, and a two-dimensional photonic crystal layer 11 including different refractive index regions (holes 111) disposed two-dimensionally on a plate-like base material 112, the different refractive index regions having a refractive index different from a refractive index of the base material, so that a refractive index distribution is formed, are stacked. Each different refractive index region in the two-dimensional photonic crystal layer 11 is disposed at a position shifted from each lattice point of a basic two-dimensional lattice that has periodicity defined to generate a resonant state of light of the wavelength λL by forming a two-dimensional standing wave and not to emit light of the wavelength λL to outside. A positional shift vector Δr↑ representing the shift of the position of the different refractive index region at the each lattice point from the lattice point is expressed by Δr↑=d·sin(±G′↑·r↑+ψ0)·(cos(L(φ+φ0)), sin(L(φ+φ0))) by using a wave number vector k↑=(kx, ky) of light of the wavelength in the two-dimensional photonic crystal layer 11, an effective refractive index neff of the two-dimensional photonic crystal layer, an azimuth angle φ from a predetermined reference line extending in a predetermined direction from a predetermined origin of the basic two-dimensional lattice, an arbitrary constant φ0, and a reciprocal lattice vector G′=±(kx±k↑|(sin θ cos φ)/neff, ky±k↑|(sin θ sin φ)/neff) expressed by using a spread angle θ of a laser beam, the position vector r↑ of the each lattice point, arbitrary constants d and ψ0, and an integer L excluding 0.

    Peptide having affinity for silicon nitride (Si3N4), and use therefor

    公开(公告)号:US09701760B2

    公开(公告)日:2017-07-11

    申请号:US14378433

    申请日:2013-02-12

    Abstract: The purpose of the present invention is to provide: a peptide having an affinity for silicon nitride; a polynucleotide encoding the peptide; an expression vector for expressing the peptide having an affinity for silicon nitride; an expression vector for expressing a peptide fusion protein that comprises the peptide having an affinity for silicon nitride and a target protein; a transformant obtained by introducing the expression vector into a host cell; a peptide fusion protein obtained from the transformant; a silicon nitride substrate to which a peptide having an affinity for silicon nitride has been bonded; a method for immobilizing a target protein to a silicon nitride substrate; a composition for immobilizing a target protein to a silicon nitride substrate, the composition comprising a peptide having an affinity for silicon nitride; and a linker for immobilizing a target protein to a silicon nitride substrate, the linker comprising a peptide having an affinity for silicon nitride. The invention involves a peptide having an affinity for silicon nitride, the peptide comprising (1-1) a peptide having the amino acid sequence of one of SEQ ID NOS: 1, 2 and 23 to 27, (1-2) a peptide that has an affinity for silicon nitride and comprises an amino acid sequence obtained by deleting, adding, and/or substituting one or more amino acids in one of the amino acid sequences indicated in (1-1), or a fragment of one of the peptides.

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