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Proceedings Paper

Optical bistability created by using PNEGIT device
Author(s): Wei-Lian Guo; Pei-Ning Zhang; Yun-Guang Zheng; Shu-Rong Li; Gang Guo
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Paper Abstract

By photo-sensitizing the surface controlled negative impedance transistor (NEGIT), we can get a novel photo-negative resistance device--- photo-surface controlled negative impedance transistor--- PNEGIT, PNEGIT has a photo-surface controlled negative resistance I-V characteristics. By taking PNEGIT as an Optical input device to form a drive device and a resistor RL to form a load of the inverter. And taking a LED in series with RL as an optical output device. Due to the Instability at the state in the negative resistance region. A photo-controlled Bistability can be made. The state in the valley current region will jump suddenly to the state in the positive resistance region or jumps in the opposite direction as the optical input power pin increases or decreases respectively. It is demonstrated that, there are two states of photo current or optical output power pout corresponding one State of pin Value. This optical Bistability has the function of optical switching, optical self-latching, and optical memory. It can be Applicated in the area of optical information processing, optical computing and optical communication in coming days.

Paper Details

Date Published: 14 November 2002
PDF: 8 pages
Proc. SPIE 4935, Smart Structures, Devices, and Systems, (14 November 2002); doi: 10.1117/12.476110
Show Author Affiliations
Wei-Lian Guo, Tianjin Univ. (China)
Pei-Ning Zhang, Tianjin Univ. (China)
Yun-Guang Zheng, Tianjin Univ. (China)
Shu-Rong Li, Tianjin Univ. (China)
Gang Guo, Tianjin Agriculture Institute (China)


Published in SPIE Proceedings Vol. 4935:
Smart Structures, Devices, and Systems
Erol C. Harvey; Derek Abbott; Vijay K. Varadan, Editor(s)

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