Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

NJIT physicist sees terahertz imaging as ultimate defense against terrorism

01.11.2005


John Federici, PhD, professor, department of physics, New Jersey Institute of Technology (NJIT) and other physicists at NJIT recently received a U.S. Patent for a Teraherz imaging system and method. Since 1995, Terahertz imaging has grown in importance as new and sophisticated devices and equipment have empowered scientists to understand its potential.



"I see the Terahertz spectrum as one of the critical technologies for defense against suicide bombers and other terrorist activities," Federici said.

Federici’s research has focused on the potential applications of Terahertz rays for directly detecting and imaging concealed weapons and explosives. Another application is the remote detection of chemical and biological agents in the atmosphere. In November of 2004, Federici and.


"The idea has been to apply different methods of imaging to Terahertz rays," said Federici. His research team has focused in particular on applications of synthetic aperture imaging to the Terahertz range. "The advantage of this particular method is the ability to generate Terahertz images with a large number of pixels using a limited number of Terahertz detectors. This imaging method should also be capable of video-rate imaging, thereby enabling the real-time monitoring of people hiding concealed explosives or other dangers." A typical imaging system would be analogous to a still or video camera designed for this purpose.

Scientists favor Terahertz radiation because it can transmit through most non-metallic and non-polar mediums. When a Terahertz system is used correctly, people can see through concealing barriers such as packaging, corrugated cardboard, walls, clothing, shoes, book bags, pill coatings, etc. in order to probe for concealed or falsified materials.

Once the rays penetrate those materials, they can also characterize what might be hidden –be they explosives, chemical agents or more--based on a spectral fingerprint the rays will sense which can identify the material. Terahertz radiation also poses minimal or no health risk to either the person being scanned or the THz system operator.

Federici and his team recently published "Terahertz imaging and sensing for security applications explosives, weapons and drugs," in Semiconductor Science and Technology (Vol 20, page 266, 2005). The U.S. Department of Homeland Security, Army Research Office and National Science Foundation have provided funding for this research since 2002.

The article focused on three configurations of Terahertz systems, examining when and how best to use the rays. Transmission versus reflective detection, pulsed Terahertz detection systems versus continuous wave systems, and close proximity versus stand-off detection are compared.

"While pulsed Terahertz detection systems are capable of close proximity detection," said Federici, "there are many factors to take into account. For example, distortions to Terahertz pulses introduced by propagation through the atmosphere, favor a continuous wave system for stand-off detection."

Federici has recently garnered praise for his work. He recently received NJIT’s top research honor, the Harlan Perlis Research Award. Next month, Federici will accept an award for his work from the Research & Development Council of New Jersey. The council honors and helps those individuals upholding the legacies of Albert Einstein and Thomas Alva Edison, both of whom lived and worked most of their lives in New Jersey.

Federici’s research interests span discovery of infrared quenched photo-induced superconductivity and localized energy states in nano-materials to online semi-conductor process monitoring to advanced spectroscopic imaging technologies. He has been the lead writer on more than 50 publications in scholarly journals and holds four patents. His most recent patents emphasize Terahertz synthetic aperture imaging.

Sheryl Weinstein | EurekAlert!
Further information:
http://www.njit.edu

More articles from Physics and Astronomy:

nachricht Computer model predicts how fracturing metallic glass releases energy at the atomic level
20.07.2018 | American Institute of Physics

nachricht What happens when we heat the atomic lattice of a magnet all of a sudden?
18.07.2018 | Forschungsverbund Berlin

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: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>