恭賀力翰文創吳志榮執行長之科學研究榮登國際知名科學期刊(2012/05/29)

科學研究題目：
Compact and low-power optical logic NOT gate based on photonic crystal waveguides without optical amplifiers and nonlinear materials

發表科學期刊網址

科學研究成果英文摘要：
Abstract
An optical logic NOT gate (OLNG) is presented based on photonic crystal (PhC) waveguides without nonlinear materials and optical amplifiers. Also, a way of determining the operating parameters is presented. It is demonstrated through finite-difference time-domain simulations that the structure presented can operate as an OLNG. The optimized contrast ratio, defined as the logic-“1” output power divided by the logic-“0” output power, is found to be 297.07 or 24.73 dB. The size of the OLNG can be as small as 7a×7a, where a is the lattice constant of the PhC. Further, the OLNG presented in this paper can operate at a bit rate as high as 2.155  Tbit/s, which is much higher than that of electronic or optical logic gates developed until now. Moreover, as it is not based on the nonlinear effect, the OLNG can operate at very low powers and a relatively large operating bandwidth. This is favorable for large-scale optical integration and for developing multiwavelength parallel-processing optical logic systems.

研究團隊：Chih Jung Wu（吳志榮）, Chung Ping Liu（劉宗平）, and Zhengbiao Ouyang（歐陽征標）

期刊介紹：
Applied Optics publishes articles emphasizing applications-centered research in optics, moving the potential of science and technology to the practical. Topic areas range from optical technology to information processing to lasers, photonics and environmental optics.

Editor-in-Chief: Joseph N. Mait, US Army Research Laboratory
ISSN: 1559-128X | eISSN: 2155-3165
Frequency: Rapid article-at-a-time publication; 3 issues per month
2010 ISI Impact Factor: 1.70