Special Section: Selected Papers from the 2nd Mediterranean Conference on Nanophotonics

All-optical nano modulator, sensor, wavelength converter, logic gate, and flip flop based on a manipulated gold nanoparticle

[+] Author Affiliations
Asaf Shahmoon, Yoed Abraham, Ofer Limon

Bar-Ilan University, School of Engineering, Ramat-Gan 52900 Israel

Liora Bitton, Aviad Frydman

Bar-Ilan University, Physics Department, Jack and Pearl Resnick Institute of Advanced Technology, Ramat-Gan 52900 Israel

Ron Unger

Bar-Ilan University, Faculty of Life Science, Ramat-Gan 52900 Israel

Zeev Zalevsky

Bar-Ilan University, School of Engineering, Ramat-Gan, 52900 Israel

J. Nanophoton. 4(1), 041780 (July 20, 2010). doi:10.1117/1.3473784
History: Received January 31, 2010; Revised June 4, 2010; Accepted June 9, 2010; July 20, 2010; Online July 20, 2010
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Abstract

We developed a device in which one can shift and control the position of a gold nanoparticle by using special type of optical tweezers realized by guiding and confining light in a nanosize void structure in which the nanoparticle is placed. The nanosize void is positioned inside a multimode interference (MMI) region of a silicon waveguide. The coupling of light from two opposite sides of the optical device generates standing interference waves in the MMI region. The relative phase between the two coupled beams is controllable and therefore also the position of the fringes of the standing waves. Evanescent tails coming from the guided standing waves interfere in the void and allow control the position of the trapped nanoparticle. A nanoparticle with diameter of 30 nm was experimentally implanted in the void. The particle was trapped by one of the high intensity evanescent fringes. Changing the relative phase between the two inputs to the chip allowed us experimentally to modify the location of the fringes and the position of the particle (similarly to what happens in optical tweezers). This experimentally demonstrated capability may be useful for all-optical nano modulators, sensors, wavelength converters, logic gates and even a state machine (e.g. a flip flop).

© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Asaf Shahmoon ; Yoed Abraham ; Ofer Limon ; Liora Bitton ; Aviad Frydman, et al.
"All-optical nano modulator, sensor, wavelength converter, logic gate, and flip flop based on a manipulated gold nanoparticle", J. Nanophoton. 4(1), 041780 (July 20, 2010). ; http://dx.doi.org/10.1117/1.3473784


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