Nippon Telegraph and Telephone Corporation

Yoshito Jin

Masaru Shimada

Kenya Suzuki

Keita Yamaguchi

Mitsumasa Nakajima

Yuzo Ishii

Etsu Hashimoto

Kazunori Seno

Hideaki Sakai

Koichi Hadama

Joji Yamaguchi

Naru Nemoto

An optical input/output device includes a phase modulator element and an optical element. The phase modulator element includes a plurality of pixels arranged in a matrix and is configured to change an optical phase of signal light by applying a driving signal corresponding to a phase pattern. The optical element is configured to convert a direction of exit of the signal light so as to irradiate each pixel with the signal light from the input port. A pattern generator unit includes superimposing means for superimposing a periodic phase pattern having a predetermined period in at least one direction in a plane of the phase modulator element, and means for controlling an amplitude of the periodic phase pattern. The signal light is diffracted to a position according to the period of the superimposed periodic phase pattern, so that light intensity of the signal light is dispersed.

Optical input/output device

A ferroelectric layer () is sandwiched between a lower electrode layer () and an upper electrode (). When a predetermined voltage (DC or pulse) is applied between the lower electrode layer () and the upper electrode () to change the resistance value of the ferroelectric layer () to switch a stable high resistance mode and low resistance mode, a memory operation is obtained. A read can easily be done by reading a current value when a predetermined voltage is applied to the upper electrode ().

Bistable resistance value acquisition device, manufacturing method thereof, metal oxide thin film, and manufacturing method thereof

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Kanagawa, Japan

Yoshito Jin