{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,27]],"date-time":"2025-11-27T02:19:58Z","timestamp":1764209998505},"reference-count":55,"publisher":"Hindawi Limited","license":[{"start":{"date-parts":[[2012,9,11]],"date-time":"2012-09-11T00:00:00Z","timestamp":1347321600000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"funder":[{"name":"Department of Science and Technology, Government of India","award":["DST\/TSG\/PT\/2008\/04"],"award-info":[{"award-number":["DST\/TSG\/PT\/2008\/04"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Advances in Optical Technologies"],"published-print":{"date-parts":[[2012,9,11]]},"abstract":"<jats:p>We present designs of all-optical reversible gates, namely, Feynman, Toffoli, Peres, and Feynman double gates, with optically controlled microresonators. To demonstrate the applicability, a bacteriorhodopsin protein-coated silica microcavity in contact between two tapered single-mode fibers has been used as an all-optical switch. Low-power control signals (&lt;200\u2009\u03bcW) at 532\u2009nm and at 405\u2009nm control the conformational states of the protein to switch a near infrared signal laser beam at 1310 or 1550\u2009nm. This configuration has been used as a template to design four-port tunable resonant coupler logic gates. The proposed designs are general and can be implemented in both fiber-optic and integrated-optic formats and with any other coated photosensitive material. Advantages of directed logic, high <jats:italic>Q<\/jats:italic>-factor, tunability, compactness, low-power control signals, high fan-out, and flexibility of cascading switches in 2D\/3D architectures to form circuits make the designs promising for practical applications.<\/jats:p>","DOI":"10.1155\/2012\/727206","type":"journal-article","created":{"date-parts":[[2011,9,11]],"date-time":"2011-09-11T19:02:43Z","timestamp":1315767763000},"page":"1-12","source":"Crossref","is-referenced-by-count":32,"title":["All-Optical Reversible Logic Gates with Optically Controlled Bacteriorhodopsin Protein-Coated Microresonators"],"prefix":"10.1155","volume":"2012","author":[{"given":"Sukhdev","family":"Roy","sequence":"first","affiliation":[{"name":"Department of Physics and Computer Science, Dayalbagh Educational Institute, Dayalbagh, Agra 282 110, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Purnima","family":"Sethi","sequence":"additional","affiliation":[{"name":"Department of Physics and Computer Science, Dayalbagh Educational Institute, Dayalbagh, Agra 282 110, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juraj","family":"Topolancik","sequence":"additional","affiliation":[{"name":"Biofunctional Photonics Group, The Rowland Institute, Harvard University, 100 Edwin H. 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