Navigation Links
Trapping T-rays for better security scanners
Date:7/11/2013

Medical diagnostic and security scanners with higher sensitivity could result from University of Adelaide research into detecting T-rays (terahertz waves).

Published in the journal Advanced Optical Materials, the researchers describe a novel structure which traps terahertz waves in tiny (micro-scale) holes to produce much higher contrast imaging than currently possible.

Terahertz waves, which are electromagnetic waves with frequencies between those used for mobile phone communications and for optical fibre communications, are used for some airport body scanners and other security scanners to see through packages and clothes. They are also capable of distinguishing malignant from healthy tissues for cancer detection.

"This work takes an unconventional path to detecting terahertz waves," says Dr Withawat Withayachumnankul, project leader and ARC Postdoctoral Fellow in the University's School of Electrical and Electronic Engineering.

Dr Withayachumnankul has worked with RMIT University in Melbourne and Albert Ludwigs University of Freiburg in Germany to produce the new structure using metamaterials (materials that show non-natural properties with the use of carefully engineered structures).

The structure is made of tiny (micro-scale) cavities etched into the surface of silicon. Terahertz waves that hit the structure are captured and compressed inside the cavities.

"By tailoring the silicon properties through the use of micro-structures (the size of a cross-section of human hair) it is possible to trap and confine the waves in a volume much smaller than the wavelength of the terahertz waves," says Dr Withayachumnankul.

"This significantly improves the efficiency of terahertz devices such as scanners and will have broad impact on biomedicine and homeland security, where better contrast means more accurate identification."

RMIT team leader Dr Sharath Sriram says: "We needed to carefully select appropriate materials and processes to produce this device. We couldn't construct the micro-cavities in our first choice of material so we changed to silicon which we had to adapt to make it slightly electrically conductive. We then used established silicon microfabrication techniques to create the micro-cavities, exploiting the conductive properties."

The new structure could be added to conventional terahertz imaging devices to enhance their performance.


'/>"/>

Contact: Dr. Withawat Withayachumnankul
withawat@eleceng.adelaide.edu.au
61-402-946-480
University of Adelaide
Source:Eurekalert

Related biology news :

1. ARS scientists test improved stink bug trapping methods
2. New methods for better purification of wastewater
3. Breakthroughs in Chikungunya research from A*STAR spell new hope for better treatment and protection
4. UNH researchers find African farmers need better climate change data to improve farming practices
5. Giant squids giant eyes: The better to see hungry whales with
6. Improved loblolly pines better for the environment, study finds
7. Fish larvae find the reef by orienting: The earlier the better
8. Intensive kidney dialysis indicates better survival rates than conventional dialysis
9. Modern hybrid corn makes better use of nitrogen, study shows
10. Bigger gorillas better at attracting mates and raising young
11. Better housing conditions for zebrafish could improve research results
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... India , December 1, 2016 ... Authentication type (Fingerprint, Voice), Future Technology (Iris Recognition ... and Region - Global Forecast to 2021", published ... USD 442.7 Million in 2016, and is projected ... at a CAGR of 14.06%.      ...
(Date:12/2/2016)... , Dec. 1, 2016   SoftServe , ... BioLock , an electrocardiogram (ECG) biosensor analysis ... a key IoT asset. The smart system ensures ... vehicle,s steering wheel and mobile devices to easily ... As vehicle technology advances, so too ...
(Date:11/30/2016)... , Nov. 30, 2016 Not many of us realize that we spend ... recovery so we need to do it well. Inadequate sleep levels have been found ... pressure, stroke, diabetes, and even cancer. Maybe now is the best time ... could help them to manage their sleep quality? Continue ... ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... , ... December 01, 2016 ... ... will share findings demonstrating the value of DNA microarray comparative genomic hybridization ... year’s San Antonio Breast Cancer Symposium. Using molecular test results from tumors ...
(Date:12/2/2016)... ... December 01, 2016 , ... DrugDev believes the only way ... beautiful technology experience. All three tenets were on display at the 2nd Annual DrugDev ... over 40 sponsor, CRO and site organizations to discuss innovation and the future of ...
(Date:12/2/2016)...   SurePure, Inc. (OTCQB: SURP) a global ... has concluded an agreement with Tamarack Biotics under which ... to acquire units of the Company,s patented photopurification technology ... Concurrently with the option, SurePure has ... will seek regulatory approvals in the United ...
(Date:11/30/2016)... CLEVELAND , Nov. 30, 2016  GenomOncology today announced ... Vice President of Medical Affairs.  Dr. Coleman ... enhancing the company,s proprietary knowledge-enabled platform. The GenomOncology software suite ... of genetic sequencing data and clinical decision support, from quality ... , ...
Breaking Biology Technology: