Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Quantum Light from Diamond and Plastic

08.04.2013
Researchers from Humboldt-Universität zu Berlin and Karlsruhe Institute for Technology (KIT) have developed a simple method to fabricate stable sources of single light quanta. The approach published in the Open Access Journal Scientific Reports of Nature Publishing Group is based on a novel hybrid approach combining two completely different material systems.

On the one side, there are tiny fragments of diamond. Besides carbon diamond contains other atoms as natural impurities. These impurity atoms or so-called colour centres are responsible for the yellow or blue colours of natural diamond.


a) Sketch of the direct laser writing process. A femtosecond laser beam is focussed into the photoresist in order to polymerize well defined 3D structures. (b) Scanning electron micrograph of such a structure after development containing several key photonic elements, such as waveguides, couplers and microdisc resonators. Scale bar is 5 µm. Figure: Oliver Benson


(a) Sketch of the experimental configuration. The excitation spot is scanned over the resonator disc. Photons are detected at both waveguide outputs simultaneously. (b) Photon counts collected at one end of the waveguide while scanning the excitation spot with a second objective. The circle highlights the position of a single NV-centre. Shape distortions are due to non closed-loop piezo-scanning. Scale bar is 5 µm. Figure: Oliver Benson

Due to their very small size of only a few millionths of a millimetre, some of the diamond fragments contained only a single colour centre, which could be excited optically with the help of laser light. The colour centre releases its energy by emission of single quanta of light, or photons, which are thus generated in a controlled way one-by-one.

The researchers now mixed the diamond fragments with a special photo resist. A focussed laser beam irradiating the resist layer induced local polymerisation, i.e. the resist was turned into plastic. In this way it was possible to write nearly arbitrary three-dimensional structures, which contain single diamond fragments with single colour centres. The research team at first fabricated optical waveguides and resonators for efficient collection and routing of the photons emitted from the colour centres.

A major advantage of the new hybrid material system is on the one hand the well-established and cost efficient fabrication method and on the other hand the unlimited stability of operation even at room temperature. The next steps are now to combine the novel structures with other optical instrumentation. The researchers expect that in this way numerous applications in the fields of high-resolution microscopy, optical sensing, or quantum information processing can be realized in a reliable and cost-efficient approach.

Further Information:

A. W. Schell, J. Kaschke, J. Fischer, R. Henze, J. Wolters, M. Wegener, O. Benson, Scientific Reports 3:1577, 1-5 (2013)

Contact:

Prof. Dr. Oliver Benson
oliver.benson@physik.hu-berlin.de
Weitere Informationen:
http://www.nature.com/srep/2013/130402/srep01577/full/srep01577.html

Constanze Haase | idw
Further information:
http://www.hu-berlin.de

More articles from Physics and Astronomy:

nachricht Engineering team images tiny quasicrystals as they form
18.08.2017 | Cornell University

nachricht Astrophysicists explain the mysterious behavior of cosmic rays
18.08.2017 | Moscow Institute of Physics and Technology

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

A Map of the Cell’s Power Station

18.08.2017 | Life Sciences

Engineering team images tiny quasicrystals as they form

18.08.2017 | Physics and Astronomy

Researchers printed graphene-like materials with inkjet

18.08.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>