公开(公告)号：US20240288748A1

公开(公告)日：2024-08-29

申请号：US18585164

申请日：2024-02-23

Applicant: STANLEY ELECTRIC CO., LTD. ,  OSAKA UNIVERSITY

Inventor： Masahiro YOSHIIKE ,  Kazuki SATO ,  Hiroyuki TOGAWA ,  Ryuji KATAYAMA ,  Tomoyuki TANIKAWA ,  Masahiro UEMUKAI ,  Yusuke MORI ,  Masashi YOSHIMURA ,  Tomoaki NAMBU

IPC: G02F1/37 ,  G02F1/35 ,  G02F1/355

CPC classification number: G02F1/37 ,  G02F1/3503 ,  G02F1/3551

Abstract: A second harmonic generation element includes a substrate, a first multilayer film reflecting mirror, a second harmonic generation layer, and a second multilayer film reflecting mirror. The first multilayer film reflecting mirror is formed on the substrate. The second harmonic generation layer is disposed on the first multilayer film reflecting mirror. The second harmonic generation layer is made of a SrB4O7 crystal that receives a fundamental wave with a predetermined wavelength and emits a second harmonic wave with a wavelength in an ultraviolet region. The second multilayer film reflecting mirror is formed on the second harmonic generation layer. The second multilayer film reflecting mirror constitutes a resonator with the first multilayer film reflecting mirror.

公开(公告)号：US20250047067A1

公开(公告)日：2025-02-06

申请号：US18847844

申请日：2023-03-14

Applicant: KYOTO UNIVERSITY ,  STANLEY ELECTRIC CO., LTD.

Inventor： Susumu NODA ,  Takuya INOUE ,  Kazuki SATO ,  Takako FUJIWARA ,  Kei EMOTO ,  Tomoaki KOIZUMI

IPC: H01S5/11 ,  H01S5/183

Abstract: A surface-emitting laser element includes a translucent substrate, a back surface of which is light emission surface, an air-hole layer that is a photonic crystal layer, and a light reflection layer including a reflection surface. The air-hole layer has a diffraction surface which has a weakening region where a separation distance between the diffraction surface and the reflection surface is provided such that a light intensity of interference light generated by interference of first diffracted light and second diffracted light is lower than a light intensity of the first diffracted light is provided, and a strengthening region where a separation distance between the diffraction surface and the reflection surface is provided such that the light intensity of the interference light is higher than the light intensity of the first diffracted light is provided.