Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Nanoscale measurements 100x more precise, thanks to improved two-photon technique

Artist's impression of photons entering beamsplitter, as per the technique.
CREDIT
University of Warwick
Artist's impression of photons entering beamsplitter, as per the technique. CREDIT University of Warwick

Abstract:
The precision of measuring nanoscopic structures could be substantially improved, thanks to research involving the University of Warwick and QuantIC researchers at the University of Glasgow and Heriot Watt University into optical sensing.

Nanoscale measurements 100x more precise, thanks to improved two-photon technique

Coventry, UK | Posted on May 8th, 2018

Technique uses photons, fundamental components of light, to measure nanoscopic materials thinner than 100,000th the width of a human hair - with 30,000 fired per second and 500bn throughout
Research will mean measurements 100x more precise than existing two-photon techniques - with the potential to aid research into cell membranes and DNA
Two-photon technique more stable than existing one-photon technology
New technique could also be substantially cheaper
The precision of measuring nanoscopic structures could be substantially improved, thanks to research involving the University of Warwick and QuantIC researchers at the University of Glasgow and Heriot Watt University into optical sensing.

QuantIC is the UK Quantum Technology Hub in Quantum Enhanced Imaging and part of the UK National Quantum Technologies Programme.

Using pairs of photons, fundamental components of energy that make up light, the researchers have devised a way to measure the thickness of objects that are less than a 100,000th of the width of a human hair.

The new technique involves firing two near identical photons onto a component known as a beamsplitter, and monitoring their subsequent behaviour - with some 30,000 photons detected per second, and 500bn in use throughout a full experiment.

Because of the tendency of identical photons to 'buddy up' and continue travelling on together -- the result of a delicate quantum interference effect - the researchers' newly developed setup offers the same precision and stability as existing one-photon techniques that, due to the equipment required, are more costly.

Offering a range of potential uses, including research to better understand cell membranes and DNA, as well as quality control for nanoscopic 2D materials of a single atom's thickness, such as graphene, the new research is also a marked improvement on current two-photon techniques with up to 100x better resolution.

To measure the thickness of a transparent object (any object through which a photon is able to pass), each of a pair of identical photons are fired along separate paths:

Photon A then continues into a beamsplitter, whilst Photon B is slowed down by a transparent object before entering the same beamsplitter.
The likelihood that the photons exit the beamsplitter together is then recorded allowing researchers to measure the thickness of the transparent object Photon B passed through.
As the thickness of the sample is increased, the photons are more likely to exit the beamsplitter separately.

Dr George Knee of the University of Warwick's Department of Physics, who developed the theory behind the new method, said:

"What's really exciting about these results is that we can now investigate objects down at the nanoscale with an optical sensor operating on a fundamentally different physical effect.

"Until now, so-called two-photon interference has not been able to achieve such great resolution, meaning that we are stuck with some of the downsides of the established methods based on single-photon interference - which requires more expensive technology than our new two-photon technique.

"We have managed to get a big improvement by tuning the interferometer into a more sensitive operation mode and removing slow drift by repeatedly switching the sample in and out.

"The advantages of being impervious to phase fluctuations and having large dynamic range mean that sensors such as ours could have a big impact on biological imaging and the associated research that it feeds into."

QuantIC co-investigator and lead researcher on the project, Professor Daniele Faccio, whose two photon sensing technology was used to generate the data said:

"The results of our collaboration with the University of Warwick offer a range of potential uses, including research to better understand cell membranes and DNA as well as a quality control for nanoscopic 2D materials of a single atom's thickness, such as graphene.

We are excited to be advancing quantum imaging and helping to maintain the UK's position in the development of new quantum technologies."

The research, Attosecond-Resolution Hong-Ou-Mandel Interferometry, is published by Science Advances.

####

For more information, please click here

Contacts:
Luke Walton

782-454-0863

Copyright © University of Warwick

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 News Press

News and information

Drilling speed increased by 20% yet another upgrade in the oil & gas sector made possible by graphene nanotubes January 15th, 2019

Chirality in 'real-time' January 14th, 2019

New materials could help improve the performance of perovskite solar cells January 11th, 2019

Media invited to open meeting on the future of quantum technology held at RIT Jan. 23-25: Leaders from NASA, NSF, NIST and Sandia National Laboratory to attend January 11th, 2019

Spintronics 'miracle material' put to the test: Physicists build devices using mineral perovskite January 11th, 2019

Graphene/ Graphite

Drilling speed increased by 20% yet another upgrade in the oil & gas sector made possible by graphene nanotubes January 15th, 2019

Imaging

Chirality in 'real-time' January 14th, 2019

2 Dimensional Materials

2D materials may enable electric vehicles to get 500 miles on a single charge January 11th, 2019

Possible Futures

Chirality in 'real-time' January 14th, 2019

Media invited to open meeting on the future of quantum technology held at RIT Jan. 23-25: Leaders from NASA, NSF, NIST and Sandia National Laboratory to attend January 11th, 2019

Spintronics 'miracle material' put to the test: Physicists build devices using mineral perovskite January 11th, 2019

Cartilage could be key to safe 'structural batteries' January 11th, 2019

Nanomedicine

Chirality in 'real-time' January 14th, 2019

Ultra-sensitive sensor with gold nanoparticle array January 9th, 2019

Arrowhead Pharmaceuticals Begins Dosing in Phase 1 Study of ARO-ANG3 for Treatment of Dyslipidemias and Metabolic Diseases January 7th, 2019

Arrowhead Pharmaceuticals Files for Regulatory Clearance to Begin Phase 1 Study of ARO-APOC3 for Treatment of Hypertriglyceridemia January 7th, 2019

Nanoelectronics

Study on low noise, high-performance transistors may bring innovations in electronics December 28th, 2018

The feature size and functional range of molecular electronic devices: Monitoring the transition from tunneling leakage current to molecular tunneling December 16th, 2018

2-D magnetism: Atom-thick platforms for energy, information and computing research: Scientists say the tiny 'spins' of electrons show potential to one day support next-generation innovations in many fields October 31st, 2018

Machine learning helps improving photonic applications September 28th, 2018

Discoveries

Chirality in 'real-time' January 14th, 2019

New materials could help improve the performance of perovskite solar cells January 11th, 2019

Spintronics 'miracle material' put to the test: Physicists build devices using mineral perovskite January 11th, 2019

Cartilage could be key to safe 'structural batteries' January 11th, 2019

Announcements

Drilling speed increased by 20% yet another upgrade in the oil & gas sector made possible by graphene nanotubes January 15th, 2019

Chirality in 'real-time' January 14th, 2019

Spintronics 'miracle material' put to the test: Physicists build devices using mineral perovskite January 11th, 2019

Cartilage could be key to safe 'structural batteries' January 11th, 2019

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

2D materials may enable electric vehicles to get 500 miles on a single charge January 11th, 2019

New materials could help improve the performance of perovskite solar cells January 11th, 2019

Spintronics 'miracle material' put to the test: Physicists build devices using mineral perovskite January 11th, 2019

Cartilage could be key to safe 'structural batteries' January 11th, 2019

Tools

Drilling speed increased by 20% yet another upgrade in the oil & gas sector made possible by graphene nanotubes January 15th, 2019

Chirality in 'real-time' January 14th, 2019

DNA design that anyone can do: Computer program can translate a free-form 2-D drawing into a DNA structure January 4th, 2019

Using sound to independently levitate a range of objects is achieved for the first time December 28th, 2018

Nanobiotechnology

Cartilage could be key to safe 'structural batteries' January 11th, 2019

Ultra-sensitive sensor with gold nanoparticle array January 9th, 2019

Arrowhead Pharmaceuticals Begins Dosing in Phase 1 Study of ARO-ANG3 for Treatment of Dyslipidemias and Metabolic Diseases January 7th, 2019

Arrowhead Pharmaceuticals Files for Regulatory Clearance to Begin Phase 1 Study of ARO-APOC3 for Treatment of Hypertriglyceridemia January 7th, 2019

Research partnerships

Chirality in 'real-time' January 14th, 2019

Ultra-sensitive sensor with gold nanoparticle array January 9th, 2019

DNA design that anyone can do: Computer program can translate a free-form 2-D drawing into a DNA structure January 4th, 2019

Revealing hidden spin: Unlocking new paths toward high-temperature superconductors: Berkeley Lab researchers uncover insights into superconductivity, leading potentially to more efficient power transmission January 4th, 2019

Quantum nanoscience

Spintronics 'miracle material' put to the test: Physicists build devices using mineral perovskite January 11th, 2019

Quantum chemistry on quantum computers: A quantum algorithm for tracking complex chemical reactions with neither performing demanding post-Hartree-Fock calculations nor exponential time explosion January 4th, 2019

Boffins manage to keep graphene qubits 'quantum coherent' for all of 55... nanoseconds: Doesn't sound very long, but it could have big implications for quantum computing January 3rd, 2019

Researchers make liquid crystals do the twist: UMD engineers and scientists measure previously unexamined tiny force December 21st, 2018

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project