A series of progress has been made in the research of silicon-based integrated optical steering logic devices of the Institute of Semiconductors, Chinese Academy of Sciences http: //
Since the concept of optical guiding logic was jointly proposed by American scientist Hardy and Israeli scientist Shamir in 2007, optical guiding logic has attracted widespread attention. At present, there have been many US Naval Laboratories, Rice University, Fiske University, Israel Institute of Technology, etc. Research institutions engaged in relevant research.
Unlike traditional optical logic, the implementation of optical guidance logic depends on the optical switch network, each switch unit is relatively independent, and its state change does not depend on other units; moreover, the calculation result of the upper-level unit is transmitted to the lower-level unit through the speed of light The delay of information transmission is almost negligible. The loop formed by the optical guide logic device can complete all logic operations in an instant, so the calculation speed is greatly accelerated. Compared with traditional optical logic devices, optical guided logic devices do not require the use of optical nonlinear effects, and therefore do not require strong light. It is easy to realize the cascading of devices to form complex logic circuits. Due to its inherent high speed and low loss characteristics, optical steering logic devices are expected to find applications in fields that require high calculation speeds, such as radar and sonar signal processing.
Researchers of the Optoelectronics System Laboratory of the Institute of Semiconductors, Chinese Academy of Sciences proposed XOR / XOR logic devices based on the principle of optically guided logic in 2009, and took the lead in implementing the principle verification of the device internationally in 2010 (Optics Letters, 35 (2010 ) 1620-1622), Optics express, 19 (2010) 6524-6540). Afterwards, the researchers made persistent efforts and successively proposed and implemented the NOT, NAND / NAND, or / or non-optical guide logic (Optics Letters, 36 (2011) 1650-1652), optical decoder (Optics Letters, 36 (2011) 3314-3316), principle verification of optical encoders (Optics Letters, Vol. 36, No. 19, 2011). The above series of work are the main experimental research results of optical guiding logic so far.
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