High-speed integrated optical logic based on the protein bacteriorhodopsin

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Anna Mathesz (Author) Other; Laszlo Fabian (Author) Other; Sandor Valkai (Author) Other; Daniel Alexandre (Author) Other; Paulo V S Marques (Author) FCUP; Pal Ormos (Author) Other; Elmar K Wolff (Author) Other; Andras Der (Author) Other

Journal

Title: Biosensors and Bioelectronics

Vol. 46

Pages: 48-52

ISSN: 0956-5663

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 17 Citations

Scopus - 19 Citations

Scientific classification

FOS: Engineering and technology > Nano-technology

Other information

Authenticus ID: P-004-ZQE

DOI: 10.1016/j.bios.2013.02.022

Abstract (EN): The principle of all-optical logical operations utilizing the unique nonlinear optical properties of a protein was demonstrated by a logic gate constructed from an integrated optical Mach-Zehnder interferometer as a passive structure, covered by a bacteriorhodopsin (bR) adlayer as the active element. Logical operations were based on a reversible change of the refractive index of the bR adlayer over one or both arms of the interferometer. Depending on the operating point of the interferometer, we demonstrated binary and ternary logical modes of operation. Using an ultrafast transition of the bR photocycle (BR-K), we achieved high-speed (nanosecond) logical switching. This is the fastest operation of a protein-based integrated optical logic gate that has been demonstrated so far. The results are expected to have important implications for finding novel, alternative solutions in all-optical data processing research.

Language: English

Type (Professor's evaluation): Scientific