公开(公告)号：JPH03182724A

公开(公告)日：1991-08-08

申请号：JP31791489

申请日：1989-12-08

Applicant: IBM

Inventor： FUKUZAWA KAORU ,  KANO SATORU ,  TAKAHASHI YUTAKA

IPC: G02F1/295 ,  H01S5/026 ,  H01S5/062

Abstract: PURPOSE: To provide a non-mechanical light beam deflector having a deflection speed higher than GHz by providing a voltage applying means and a laser light incidence means for a plane waveguide type diffraction grating formed in a super-grating structure body or a waveguide structure including this structure body. CONSTITUTION: A deflection part having a slab waveguide structure consists of a holographic collimator 3 and a diffraction grating 4, and a laser output 5 is spread in the slab waveguide at an angle determined by the refractive index of the waveguide part of a laser part and that adjacent to the laser part. The angle of deflection in the diffraction grating 4 is a function of the refractive index but can be controlled by a charged current, and the response time of the change of the refractive index is the order of sub-nanoseconds. Thus, the non-mechanical light beam deflector having a deflection speed higher than GHz is formed.

公开(公告)号：JPH03182725A

公开(公告)日：1991-08-08

申请号：JP31791689

申请日：1989-12-08

Applicant: IBM

Inventor： FUKUZAWA KAORU ,  KANO SATORU ,  KUMADA KIYOSHI ,  BIKUTAA WAI RII ,  FURANKURIN EMU SHIERENBAAGU ,  TAKAHASHI YUTAKA

IPC: G02F1/35 ,  G02F1/355 ,  G02F3/02

Abstract: PURPOSE: To obtain a nonlinear optical element at low cost by forming a thin- film structural body so as to have fine structures by intercalation constitution in a direction perpendicular to a substrate and forming the fine structures of super-lattice structures. CONSTITUTION: When a (C10 H21 NH3 )2 PbI4 thin film 2 is formed on the substrate 1, the so-called multiple quantum well structures in which the two-dimensional layers of Pb exist an intervals of 21.3Å along the c-axis direction in the crystal and the respective layer of PbI4 , i.e., the quantum wells exist at every 21.25Å are formed on the substrate surface. The quantum confinement effect depends only on the structure in the c-axis direction even in the case of the (C10 H21 NH3 )2 PbI4 single crystal itself. The sufficient optical effect based on the quantum confinement effect is obtd. even in the case having the quantum wells structures only in the c-axis direction. As a result, the formation of the nonlinear optical element without using intricate and costly equipment is made possible.