专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP4300731A1 TWO-DIMENSIONAL PHOTONIC CRYSTAL LASER 审中-实审
公开(公告)号：EP4300731A1
公开(公告)日：2024-01-03
申请号：EP22759758.0
申请日：2022-02-24
申请人： Kyoto University
发明人： NODA, Susumu , DE ZOYSA, Menaka , SAKATA, Ryoichi , ISHIZAKI, Kenji , INOUE, Takuya , YOSHIDA, Masahiro
IPC分类号： H01S5/11 , H01S5/18
摘要： A two-dimensional photonic crystal laser includes: a pair of electrodes (a first electrode 171 and a second electrode 172); an active layer (11) provided between the pair of electrodes and configured to generate light of a predetermined wavelength upon being supplied with an electric current from the electrodes; and a two-dimensional photonic crystal layer (12) provided between any one of the pair of electrodes and the active layer (11) and including a plate-shaped base member (121) and a plurality of modified refractive index regions (122) disposed in the base member (121) and having a refractive index different from that of the base member (121), in which the plurality of modified refractive index regions (122) are disposed to be shifted by different shift amounts from respective lattice points of a two-dimensional lattice which are periodically disposed in the base member with a period corresponding to the predetermined wavelength, or/and are disposed at the respective lattice points with different areas, the shift amount or/and the area of each of the plurality of modified refractive index regions (122) is/are modified with a composite modulation period in which a plurality of periods different from each other are superposed on each other, and is/are expressed by a modulation phase Ψ(r↑) expressed using a vector r↑ indicating a position of each of the lattice points of the two-dimensional lattice, a vector k n ↑ indicating a combination of an inclination angle and an azimuthal angle of each of n (n is an integer of 2 or more) laser beams differing in the inclination angle and/or the azimuthal angle from each other, and an amplitude A n and a phase exp(iα n ) determined for each n as Ψ r ↑ = arg ∬ ∑ n A n exp i α n δ k ↑ − k n ↑ exp i k ↑ ⋅ r ↑ d k ↑ and
the amplitude A n and/or the phase exp(iα n ) for each value of n differ(s) from each other in at least two different values of n.

IPRDB

热门服务

关于我们

友情链接

联系方式