GaN express sheds new light on the path to super-fast computing

February 15, 2017 by James Raptis, University of Technology, Sydney
Detail of gallium nitride crystal, where the observed emitters are hosted in an atomic lattice. Credit: University of Technology, Sydney

The demand for faster computers is growing rapidly and the rise of big data demands novel solutions be explored to deliver quicker results.

Weather prediction systems, computation modelling of protein structures and the ever-increasing need for safer communications of confidential data are examples of information that needs to be crunched swiftly.

Several platforms are in competition to realise technologies, and among the most promising is one based on generation of non-classical light sources.

The UTS team of Associate Professor Igor Aharonovich, from the School of Mathematical and Physical Sciences (MAPS), and PhD student Amanuel Berhane has demonstrated that this technology can be realised through the commercially available material gallium nitride (GaN). It is a wide-bandgap semiconductor commonly used in BluRay devices.

"Our technologies are based on ultra-bright light pulses that can carry the information at the speed of light, paving the way for quantum cryptography and ," said Associate Professor Aharonovich.

"This is significant research because we're developing new solutions for secured communications and quantum information."

Berhane conducted the research which led to this latest discovery of gallium nitride emitters early in 2016.

"Evaluating the properties of the new single-photon source in GaN against some of the criteria set for futuristic devices such as brightness and polarisation, we concluded the emitters in GaN hold great potential," he said.

The UTS team is focused on identifying and rendering semiconductor platforms that would make possible photon-based fast computing, Berhane said.

"We work with technologically compatible materials, so the next step to build a quantum processor is becoming more and more viable."

The UTS research, conducted in collaboration with Professor Dirk Englund and his group at Massachusetts Institute of Technology (MIT), has been published in the journal Advanced Materials.

UTS co-author Professor Milos Toth said the team used experimental and numerical modelling to identify a unique arrangement of structural defects in GaN as being the source of emission.

"Our work demonstrates novel single-photon emission from films, a material that is already a viable platform for light-emitting diodes (LEDs). The emission has observed different films having varying thickness and structures," he said.

The team is now focused on integrating these sources with on-chip devices to develop a commercial prototype. Most , such as quantum computers, are still largely in the research stage, with significant strides being made in lab demonstrations. This research demonstrates use of those technologies is drawing closer.

Explore further: Quantum communications go thin and light

More information: Amanuel M. Berhane et al. Bright Room-Temperature Single-Photon Emission from Defects in Gallium Nitride, Advanced Materials (2017). DOI: 10.1002/adma.201605092

Related Stories

Quantum research race lights up the world

September 30, 2016

The race towards quantum computing is heating up. Faster, brighter, more exacting – these are all terms that could be applied as much to the actual science as to the research effort going on in labs around the globe.

Quantum leap in quest for digital speed and security

July 28, 2016

Society's increasing reliance on the internet, computers and mobile phones puts stringent demands on technological developments. Shrinking the electronic components – in other words, increasing the number of transistors ...

Single photon light emitting diodes for on-chip integration

September 26, 2016

Researchers from the Graphene Flagship use layered materials to create an all-electrical quantum light emitting diodes (LED) with single-photon emission. These LEDs have potential as on-chip photon sources in quantum information ...

New single-photon microwave source developed

August 25, 2016

A collaboration including researchers at the National Physical Laboratory (NPL) has developed a tuneable, high-efficiency, single-photon microwave source. The technology has great potential for applications in quantum computing ...

Researchers develop ideal single-photon source

September 7, 2015

With the help of a semiconductor quantum dot, physicists at the University of Basel have developed a new type of light source that emits single photons. For the first time, the researchers have managed to create a stream ...

Recommended for you

Correlated nucleons may solve 35-year-old mystery

February 20, 2019

A careful re-analysis of data taken at the Department of Energy's Thomas Jefferson National Accelerator Facility has revealed a possible link between correlated protons and neutrons in the nucleus and a 35-year-old mystery. ...

CMS gets first result using largest-ever LHC data sample

February 15, 2019

Just under three months after the final proton–proton collisions from the Large Hadron Collider (LHC)'s second run (Run 2), the CMS collaboration has submitted its first paper based on the full LHC dataset collected in ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.