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Home > Press > Nano-photonics meets nano-mechanics: Controlling on-chip nano-optics by graphene nano-opto-mechanics

False colour scanning electronic micrograph (SEM) of hybrid graphene-NV near-field nano-optomechanical system.
CREDIT: ICFO
False colour scanning electronic micrograph (SEM) of hybrid graphene-NV near-field nano-optomechanical system.

CREDIT: ICFO

Abstract:
Active in situ control of light at the nanoscale remains a challenge in modern physics and in nanophotonics in particular. A promising approach is to take advantage of the technological maturity of nanoelectromechanical systems (NEMS) and combine it with on-chip optics, but the integration of such small devices with optical fields remains difficult.

Nano-photonics meets nano-mechanics: Controlling on-chip nano-optics by graphene nano-opto-mechanics

Barcelona, Spain | Posted on January 22nd, 2016

In a recent work published in Nature Communications, ICFO researchers Dr. Antoine Reserbat-Plantey, Kevin G. Schadler, and Dr. Louis Gaudreau, led by ICREA Professors at ICFO Frank H. L. Koppens and Adrian Bachtold and ICFO Professor Darrick Chang, have presented a novel type of hybrid system, consisting of an on-chip graphene NEMS suspended a few tens of nanometres above nitrogen-vacancy centres (NVCs), which are stable single-photon emitters embedded in nanodiamonds. Their work has confirmed that graphene is an ideal platform for both nanophotonics and nanomechanics.

For their study the team of researchers fabricated for the first time such an original hybrid device. Due to its electromechanical properties, graphene NEMS can be actuated and deflected electrostatically over few tens of nanometres with modest voltages applied to a gate electrode. The graphene motion can thus be used to modulate the light emission by the NVC, while the emitted field can be used as a universal probe of the graphene position. The optomechanical coupling between the graphene displacement and the NVC emission is based on near-field dipole-dipole interactions.

The researchers were able to see that the coupling strength increases strongly for shorter distances and is enhanced because of graphene's two-dimensional (2D) character and linear dispersion. These achievements hold promise for selective control of emitter arrays on-chip, optical spectroscopy of individual nano-objects, integrated optomechanical information processing, and opens new avenues towards quantum optomechanics.

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About ICFO-The Institute of Photonic Sciences
ICFO-The Institute of Photonic Sciences is a center of research excellence devoted to the science and technologies of light with a triple mission: to conduct frontier research, train the next generation of scientists, and provide knowledge and technology transfer.

Research at ICFO targets the forefront of science and technology based on light with programs directed at applications in Health, Renewable Energies, Information Technologies, Security and Industrial processes, among others. The institute hosts 300 professionals based in a dedicated building situated in the Mediterranean Technology Park in the metropolitan area of Barcelona.

ICFO participates in a large number of projects and international networks of excellence and is host to the NEST program financed by Fundación Privada Cellex Barcelona. ICFO is a member of the Severo Ochoa Excellence program and a membre of the Barcelona Institute of Science and Technology.

For more information, please click here

Contacts:
Alina Hirschmann

34-935-542-246

Copyright © ICFO-The Institute of Photonic Sciences

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Reference to the article:

Link to the research group led by ICREA Prof at ICFO Frank Koppens:

Link to the research group led by ICREA Prof at ICFO Adrian Bachtold:

Link to the research group led by Prof at ICFO Darrick Chang:

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