文献类型：期刊文献

英文题名：INVESTIGATION OF THE 2ND-HARMONIC GENERATION CONTAINING 2 LINEARLY POLARIZED STATES IN KTIOPO4 CRYSTALS

作者：WANG, X LU, XF LIU, XL

通信作者：WANG, X[1]

机构：[1]ACAD SINICA,INT CTR MAT PHYS,SHENYANG 110015,PEOPLES R CHINA;[2]SICHUAN UNIV,DEPT PHYS,CHENGDU 610064,PEOPLES R CHINA;[3]GUIZHOU INST TECHNOL,CTR COMP,GUIYANG 550003,PEOPLES R CHINA

第一机构：ACAD SINICA,INT CTR MAT PHYS,SHENYANG 110015,PEOPLES R CHINA

通信机构：corresponding author), SICHUAN UNIV,DEPT MAT SCI,CHENGDU 610064,PEOPLES R CHINA.

年份：1995

卷号：72

期号：1

起止页码：115-123

外文期刊名：PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:A1995RH30900010)】；

语种：英文

摘要：KTiOPO4 is a positive biaxial crystal with very good nonlinear optical properties. According to the second-order nonlinear optical rule on a biaxial crystal, under the usual conditions of type II phase-matching, a slow ray (e(1)(omega)) and a fast ray (e(2)(omega)) at a fundamental frequency (the refractive index relationship is n(e1) > n(e2)) can only be transformed into a fast ray (e(2)(2 omega)) at a doubled frequency, i.e, e(1)(omega) + e(2)(omega) --> e(2)(2 omega). However, under a d.c. field applied along the c-axis of the crystal, not only is the e(2)(2 omega) ray generated, but a slow ray (e(1)(2 omega)) at the doubled frequency is also generated. The new e(1)(2 omega) ray is also linearly polarized. The 90 degrees angle between the polarization direction of the e(1)(2 omega) ray and that of the e(2)(2 omega) ray is independent of thickness in the transmission direction of the SHG element. KTiOPO4 is a typical quasi-one-dimensional ionic conductor. The phenomena investigated are caused by the quasi-one-dimensional ionic current, and can be explained using the quantum theory of photons.