Ultracompact linear on-chip silicon optical logic gates with phase insensitivity
1 Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences - P. O. Box 603, Beijing 100190, China
2 Shandong Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute of Shandong Academy of Sciences - Jinan, Shandong, 250014, China
Received: 2 July 2013
Accepted: 11 September 2013
All-optical integrated circuits for computing and information processing have been pursued for decades as a potential strategy to overcome the speed limitations intrinsic to electronics. However, feasible on-chip integrated logic units and devices still have been limited by their size, quality, scalability, and reliability. Here we analyse all-passive on-chip optical AND and NAND logic gates made from a directional emitting cavity connecting two ultrasmall photonic-crystal heterojunction diodes. The measured transmission spectra show more than 10 dB contrast of the logic transport with a high phase tolerance, agreeing well with numerical simulations. The building of linear, passive, and ultracompact silicon optical logic gates might pave the way to construct novel nanophotonic on-chip processor architectures for future optical computing technologies.
PACS: 42.79.Ta – Optical computers, logic elements, interconnects, switches; neural networks / 42.25.Bs – Wave propagation, transmission and absorption / 42.82.Gw – Other integrated-optical elements and systems
© EPLA, 2013