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

A step closer to understanding quantum mechanics: Swansea University’s physicists develop a new quantum simulation protocol October 22nd, 2017

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

Leti Coordinating Project to Develop Innovative Drivetrains for 3rd-generation Electric Vehicles: CEA Tech’s Contribution Includes Liten’s Knowhow in Magnetic Materials and Simulation And Leti’s Expertise in Wide-bandgap Semiconductors October 20th, 2017

Quantum Computing

Spin current detection in quantum materials unlocks potential for alternative electronics October 15th, 2017

Quantum manipulation power for quantum information processing gets a boost: Improving the efficiency of quantum heat engines involves reducing the number of photons in a cavity, ultimately impacting quantum manipulation power October 14th, 2017

Quantum communications bend to our needs: By changing the wavelengths of entangled photons to those used in telecommunications, researchers see quantum technology take a major leap forward September 28th, 2017

Physicists develop new recipes for design of fast single-photon gun Physicists develop high-speed single-photon sources for quantum computers of the future September 21st, 2017

Optical computing/Photonic computing

Novel 'converter' heralds breakthrough in ultra-fast data processing at nanoscale: Invention bagged four patents and could potentially make microprocessor chips work 1,000 times faster October 20th, 2017

MIPT scientists revisit optical constants of ultrathin gold films October 20th, 2017

Rice U. study: Vibrating nanoparticles interact: Placing nanodisks in groups can change their vibrational frequencies October 16th, 2017

Quantum manipulation power for quantum information processing gets a boost: Improving the efficiency of quantum heat engines involves reducing the number of photons in a cavity, ultimately impacting quantum manipulation power October 14th, 2017

Discoveries

A step closer to understanding quantum mechanics: Swansea University’s physicists develop a new quantum simulation protocol October 22nd, 2017

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

Novel 'converter' heralds breakthrough in ultra-fast data processing at nanoscale: Invention bagged four patents and could potentially make microprocessor chips work 1,000 times faster October 20th, 2017

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

Announcements

A step closer to understanding quantum mechanics: Swansea University’s physicists develop a new quantum simulation protocol October 22nd, 2017

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

Leti Coordinating Project to Develop Innovative Drivetrains for 3rd-generation Electric Vehicles: CEA Tech’s Contribution Includes Liten’s Knowhow in Magnetic Materials and Simulation And Leti’s Expertise in Wide-bandgap Semiconductors October 20th, 2017

Photonics/Optics/Lasers

A step closer to understanding quantum mechanics: Swansea University’s physicists develop a new quantum simulation protocol October 22nd, 2017

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

Novel 'converter' heralds breakthrough in ultra-fast data processing at nanoscale: Invention bagged four patents and could potentially make microprocessor chips work 1,000 times faster October 20th, 2017

MIPT scientists revisit optical constants of ultrathin gold films October 20th, 2017

Research partnerships

Novel 'converter' heralds breakthrough in ultra-fast data processing at nanoscale: Invention bagged four patents and could potentially make microprocessor chips work 1,000 times faster October 20th, 2017

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

Leti Coordinating Project to Develop Innovative Drivetrains for 3rd-generation Electric Vehicles: CEA Tech’s Contribution Includes Liten’s Knowhow in Magnetic Materials and Simulation And Leti’s Expertise in Wide-bandgap Semiconductors October 20th, 2017

Bringing the atomic world into full color: Researchers turn atomic force microscope measurements into color images October 19th, 2017

Quantum nanoscience

'Find the Lady' in the quantum world: International team of researchers presents method for quantum-mechanical swapping of positions October 18th, 2017

What can be discovered at the junction of physics and chemistry October 6th, 2017

Energy against the current on a quantum scale, without contradicting the laws of physics: A piece of research in which the UPV/EHU-University of the Basque Country has participated confirms that merely observing a flow of energy or particles can change its direction October 6th, 2017

Enhancing the sensing capabilities of diamonds with quantum properties: A simple method can give diamonds the special properties needed for quantum applications such as sensing magnetic fields September 24th, 2017

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