公开(公告)号：US20250044621A1

公开(公告)日：2025-02-06

申请号：US18704933

申请日：2022-10-30

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Satoshi AYA ,  Mingjun HUANG ,  Xiuhu ZHAO ,  Jinxing LI

IPC: G02F1/00 ,  C09K19/02 ,  C09K19/20 ,  C09K19/58 ,  G02F1/355 ,  G02F1/37

Abstract: The present invention discloses a ferroelectric helical liquid crystal material and a method for realizing second harmonic enhancement therefor. By means of the method, a ferroelectric helical liquid crystal with an ultrahigh polarity helical structure is obtained by doping chiral molecules with ferroelectric nematic phase liquid crystals, and a dielectric constant of the ferroelectric helical liquid crystal is 104. This type of liquid crystal material has a superstrong nonlinear optical effect and can excite high-intensity second harmonic waves (for example, a nonlinear coefficient of the liquid crystal material is equivalent to that of a LiNbO3 nonlinear (NLO) crystalline material). Based on adjustability of a periodical helical structure of the ferroelectric helical liquid crystal, a molecular pitch of the ferroelectric helical liquid crystal is tuned by means of a concentration of chiral molecules (i.e., a polarization period is regulated).

公开(公告)号：US20240019746A1

公开(公告)日：2024-01-18

申请号：US18034375

申请日：2021-10-27

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Satoshi AYA ,  Mingjun HUANG ,  Hiroya NISHIKAWA ,  Jinxing LI ,  Junichi KOGO ,  Junchen ZHOU ,  Xiuhu ZHAO

IPC: G02F1/137 ,  G02F1/1337 ,  C09K19/20 ,  C09K19/34 ,  C09K19/58

CPC classification number: G02F1/13718 ,  G02F1/133723 ,  G02F1/133788 ,  G02F1/133784 ,  C09K19/2007 ,  C09K19/3402 ,  C09K19/586 ,  C09K2019/2078 ,  C09K2019/3422

Abstract: The present invention discloses an ultra-high-polarity chiral liquid crystal material, a liquid crystal laser and a preparation method therefor. The ultra-high-polarity chiral liquid crystal material has, in a certain temperature range, a high dielectric constant of ε˜104 and a characteristic of extremely-strong second harmonic response 3 to 10 times as much as that of a quartz crystal, and a pitch of the ultra-high-polarity chiral liquid crystal material is adjusted within 0.1 to 1 micrometer according to a doped concentration of the chiral molecule.