Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Sound gives nanocavity a twist

Abstract:
Researchers from Augsburg, Munich and Santa Barbara (California) successfully combined the worlds of nanophotonics and nanomechanical systems. The scientists work for the cluster of excellence Nanosystems Initiative Munich (NIM), the Center for Nanoscience (CeNS), the Augsburg Center for Innovative Technologies (ACIT) and for the California NanoSystems Institute (CNSI) at Santa Barbara.

Sound gives nanocavity a twist

Munich, Germany and Santa Barbara, CA | Posted on October 21st, 2011

NIM graduate student Daniel Fuhrmann and his supervisor Hubert Krenner demonstrate in the latest issue of Nature Photonics that a sound wave can be used to control a photonic crystal. Quantum effects within the crystal lead to an fast and very efficient generation and modulation of single photons, the quanta of light. Hubert Krenner recently established a prestigious Emmy Noether Junior Research Group at the Chair of Achim Wixforth at Augsburg University.

For their experiments the team fabricated a freestanding nanomembrane of semiconducting material. Into the membrane they drilled a large periodic array of tiny holes using cleanroom nanofabrication. In this structure, a photonic crystal, they trapped light of a well-defined wavelength or color inside a region where they skipped three holes. As light emitters they placed so-called quantum dots inside of this nanocavity. These quantum dots are often called artificial atoms because they - just like real atoms - emit light at sharp spectral lines and as single quanta (photons).

Until now the key challenge in this system was to overlap the wavelength of the light trapped in the nanocavity and the light emitted by the quantum dot. When the two wavelengths are in resonance the quantum mechanical Purcell effect leads to a dramatic increase of the light extraction efficiency. The NIM-CNSI research team solved this problem very elegantly: the scientists used a nanoquake, so-called surface acoustic waves. These waves periodically stretch and compress the thin membrane and its precisely ordered array of holes. The nanoquakes deform the photonic crystal at radio frequency and the wavelength of the light inside the nanocavity oscillates back and forth in less than a third of a nanosecond. This is more than ten times faster than any other approach worldwide.

NIM-graduate student Daniel Fuhrmann is excited about the success of his experiments: "The idea of an acoustically modulated photonic crystal existed in our lab for quite a long time. After all the hard work it made me really proud to actually see the wavelength of the nanocavity oscillating with the shaking of the nanoquake. I am also very happy that we again have shown that surface acoustic waves, our special tool in Augsburg, lead to surprising results and outstanding research also in the field of nanophotonics"

The Augsburg group is renowned for their pioneering work and application of surface acoustic waves. They apply these to various types of nanosystems ranging from biological and biophysical systems over microfluidics to fundamental physical effect such as the Quantum Hall Effect. All these experiments have attracted large attention worldwide and built the outstanding reputation of their research using their nanoquakes on a chip.

The experiment by Daniel Fuhrmann and his colleagues from Bavaria and California is an excellent example for a successful international collaboration between the two high-tech states on both sides of the Atlantic Ocean. Hubert Krenner and Achim Wixforth both spent a long time at UC Santa Barbara and frequently visit their Californian colleagues. The project was seed-funded by the Bavarian-Californian Technology Center (BaCaTeC) and carried out supported by NIM within a PhD student scholarship of the Bayerische Forschungsstiftung (BFS).

Based on these groundbreaking experiments researchers expect that a highly efficient, acoustically triggered "single photon source" will be realized. Such a device is crucially required for inherently secure quantum-cryptography and the optical quantum computer.

####

For more information, please click here

Contacts:
Dr. Birgit Gebauer
Outreach Manager
Nanosystems Initiative Munich
Schellingstraße 4
80799 München, Germany
Phone: +49 (89) 2180 5091
Fax: +49 (89) 2180 5649
birgit.gebauer(at)lmu.de

Copyright © Nanosystems Initiative Munich

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Paper: D. A. Fuhrmann, Susanna M. Thon, H. Kim, D. Bouwmeester, P. M. Petroff, A. Wixforth, H. J. Krenner, Nature Photonics 5, 605–609 (2011). doi:10.1038/nphoton.2011.208

Related News Press

News and information

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Metal nanoparticles induced visible-light photocatalysis: Mechanisms, applications, ways of promoting catalytic activity and outlook April 27th, 2017

Arrowhead Pharmaceuticals to Webcast Fiscal 2017 Second Quarter Results April 27th, 2017

Quantum Computing

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Harris & Harris Group Issues Its Financial Statements as of December 31, 2016, Posts Its Annual Shareholder Letter, And Will Host a Conference Call for Shareholders on Friday, March 17, 2017 March 15th, 2017

Sorting machine for atoms:Researchers at the University of Bonn clear a further hurdle on the path to creating quantum computers February 10th, 2017

First ever blueprint unveiled to construct a large scale quantum computer February 3rd, 2017

Optical computing/Photonic computing

AIM Photonics Presents Cutting-Edge Integrated Photonics Technology Developments to Packed House at OFC 2017, the Optical Networking and Communication Conference & Exhibition April 11th, 2017

Photonics breakthough paving the way for improved wireless communication systems: The work could bolster the wireless revolution underway with efficiencies several orders of magnitude April 5th, 2017

Controlling forces between atoms, molecules, promising for ‘2-D hyperbolic’ materials April 4th, 2017

Researchers “iron out” graphene’s wrinkles: New technique produces highly conductive graphene wafers April 3rd, 2017

Discoveries

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Metal nanoparticles induced visible-light photocatalysis: Mechanisms, applications, ways of promoting catalytic activity and outlook April 27th, 2017

Geoffrey Beach: Drawn to explore magnetism: Materials researcher is working on the magnetic memory of the future April 25th, 2017

Announcements

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Metal nanoparticles induced visible-light photocatalysis: Mechanisms, applications, ways of promoting catalytic activity and outlook April 27th, 2017

Arrowhead Pharmaceuticals to Webcast Fiscal 2017 Second Quarter Results April 27th, 2017

Photonics/Optics/Lasers

Using light to propel water : With new method, MIT engineers can control and separate fluids on a surface using only visible light April 25th, 2017

Method improves semiconductor fiber optics, paves way for developing devices April 16th, 2017

AIM Photonics Presents Cutting-Edge Integrated Photonics Technology Developments to Packed House at OFC 2017, the Optical Networking and Communication Conference & Exhibition April 11th, 2017

Photonics breakthough paving the way for improved wireless communication systems: The work could bolster the wireless revolution underway with efficiencies several orders of magnitude April 5th, 2017

Research partnerships

California Research Alliance by BASF establishes more than 25 research projects in three years April 26th, 2017

Better living through pressure: Functional nanomaterials made easy April 19th, 2017

Shedding light on the absorption of light by titanium dioxide April 14th, 2017

AIM Photonics Presents Cutting-Edge Integrated Photonics Technology Developments to Packed House at OFC 2017, the Optical Networking and Communication Conference & Exhibition April 11th, 2017

Quantum nanoscience

The speed limit for intra-chip communications in microprocessors of the future January 23rd, 2017

First experimental proof of a 70 year old physics theory: First observation of magnetic phase transition in 2-D materials, as predicted by the Nobel winner Onsager in 1943 January 6th, 2017

Quantum simulation technique yields topological soliton state in SSH model January 3rd, 2017

Diamonds are technologists' best friends: Researchers from the Lomonosov Moscow State University have grown needle- and thread-like diamonds and studied their useful properties December 30th, 2016

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project