Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Speeding up digital performance using engineered light

21.11.2016

In an experiment carried out at MPQ, the fastest ever switching of electric currents in semiconductors has been achieved with few-cycle laser pulses.

Modern electronics and digital technologies rely on the control of electric current in semiconductor devices, from computers to smartphones and amplifiers. An international study by scientists from Monash University (Melbourne, Australia) and the Max Planck Institute of Quantum Optics (Garching, Germany) lays foundations for a dramatic performance increase of semiconductor-based signal-processing technologies. (Optica, 14 November 2016, DOI: 10.1364/OPTICA.3.001358).


A semiconductor connected to metal electrodes is exposed to an ultra-short laser pulse, generating and steering directly measurable electric currents.

Graphic: Christian Hackenberger

The work, published in Optica, found that electric current can be turned on and off in a semiconductor (gallium nitride in this case) at unprecedented speeds by using engineered light as a means of control. These findings pave the way for the design of optically controlled semiconductor electronic devices that can operate at frequencies much larger than those demonstrated until now.

“The time it takes to switch electric current on and off in a semiconductor, determines the rate at which electronic devices can perform. We found that by using few-cycles laser pulses with engineered optical field waveforms – which are the fastest tools available to researchers – electric current can be controlled in a semiconductor at rates thousands of times higher than those achieved in state-of-the-art electronics,” said Monash researcher and ARC Future Fellow, Dr. Agustin Schiffrin, the lead investigator of the study.

“We successfully investigated how these devices operate in various regimes by comparing the circuits with two different materials: gallium nitride and fused silica. In both cases, laser field induces interference of electronic excitations and allows controlling them on a femtosecond timescale. Our current setup performs at much lower field intensities than those required for dielectrics, so it can work even with non-amplified laser pulse sources,” said Dr. Stanislav Kruchinin, a researcher from MPQ.

This work showcases the fastest control of electric currents ever measured in a semiconductor, opening the door to the design of novel optically controlled electronics.

Original publication:

T. Paasch-Colberg, S. Yu. Kruchinin, Ö. Sağlam, S. Kapser, S. Cabrini, S. Muehlbrandt, J. Reichert, J. V. Barth, R. Ernstorfer, R. Kienberger, V. S. Yakovlev, N. Karpowicz and Agustin Schiffrin
Sub-cycle optical control of current in a semiconductor: from the multiphoton to the tunneling regime
Optica, 14 November 2016, DOI: 10.1364/OPTICA.3.001358

Contact:

Dr. Olivia Meyer-Streng
Press & Public Relations
Max Planck Institute of Quantum Optics, Garching, Germany
Phone: +49 (0)89 32 905 -213
E-mail: olivia.meyer-streng@mpq.mpg.de

Silvia Dropulich
Marketing and Communications Manager
Monash University, Melbourne, Australia
Phone: +61 3 9902 4513
E-mail: silvia.dropulich@monash.edu


Dr. Olivia Meyer-Streng | Max-Planck-Institut für Quantenoptik
Further information:
http://www.mpq.mpg.de/

More articles from Physics and Astronomy:

nachricht When fluid flows almost as fast as light -- with quantum rotation
22.06.2018 | The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences

nachricht Thermal Radiation from Tiny Particles
22.06.2018 | Universität Greifswald

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: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>