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Optical Engineering

Novel proposal for all-optical Fredkin logic gate with bacteriorhodopsin-coated microcavity and its applications
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Paper Abstract

We present a design of the conservative, reversible, and universal all-optical Fredkin logic gate based on a single bacteriorhodopsin (BR)-protein-coated silica microcavity. The switching of a near-IR laser beam at 1310 or 1550 nm by photoactivating a silica microsphere coated with BR monolayers with a low power control signal at 532 nm, in contact between two tapered single-mode fibers, is used as a template for a four-port tunable resonant coupler Fredkin gate. The proposed gate has also been used to design low-power all-optical AND, OR, NOT, XOR, and X-NOR gates and full-adder and demultiplexer/multiplexer circuits. The advantages of high Q-factor, tunability, compactness, low-power control signals, high fan-out, and flexibility of cascading switches in 2-D to 3-D architectures to form circuits, makes the designs promising for practical applications. The proposed design provides a new paradigm for hybrid nanobiophotonic integration for all-optical computing.

Paper Details

Date Published: 1 June 2010
PDF: 11 pages
Opt. Eng. 49(6) 065201 doi: 10.1117/1.3449114
Published in: Optical Engineering Volume 49, Issue 6
Show Author Affiliations
Sukhdev Roy, Dayalbagh Educational Institute (India)
Mohit Prasad, Dayalbagh Educational Institute (India)

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