Next Possible Use Of Terahertz Radiation? Invisibility

  • Apr 29, 2011

Invisibility appears to be the next possible advance in the use of Terahertz radiation in medicine, security and communications.

A research team from Northwestern and Oklahoma State universities claims to be first to cloak a three-dimensional object from view in a broad range of Terahertz frequency light, which lies between infrared and microwaves. The team's paper will be presented at this year's Conference on Lasers and Electro Optics (CLEO: 2011, May 1 - 6 in Baltimore).

In the team’s paper, Cheng Sun of Northwestern describes how a rigid sponge-like cloaking structure less than 10 millimeters long on a side was built up in 220 layers, each precisely defined to vary the index of refraction and bend light to render invisible anything located beneath a shallow concave bump on the cloak’s bottom surface. The group showed that both the physical geometry and the spectrographic signature of a chemical strip about the width of 10 human hairs disappeared when cloaked.

Despite its Harry Potter-like allure, concealing tiny objects from view is not the team’s ultimate goal, Sun said. Rather, this latest demonstration shows that the new “transformation optics” principles and 3-D lithography techniques they used to make the cloak can also enable optical components for guiding, collimating, and focusing terahertz light in a variety of ways -- in new medical and scientific diagnostic tools, airport security scanners, and data communication devices.

 

Featured

  • Progressing in Capabilities

    Progressing in Capabilities

    Hazardous areas within industries like oil and gas, manufacturing, agriculture and the like, have long-sought reliable video surveillance cameras and equipment that can operate safely in these harsh and unpredictable environments. Read Now

  • A Comprehensive Nationwide Solution

    A Comprehensive Nationwide Solution

    Across the United States, manufacturing facilities, distribution centers, truck yards, parking lots and car dealerships all have a common concern. They are targets for catalytic converters. In nearly every region, cases of catalytic converter thefts have skyrocketed. Read Now

  • Planning for Your Perimeter

    Planning for Your Perimeter

    The perimeter is an organization’s first line of defense and a critical element of any security and surveillance program. Even if a building’s interior or exterior security is strong, without a solid perimeter surveillance approach any company or business is vulnerable. Read Now

  • The Key Issue

    The Key Issue

    It is February 2014. A woman is getting ready in her room on a cruise ship when she hears a knock on the door; it is a crewmember delivering breakfast. She is not presentable so she tells him to leave it by the door. Read Now

Most   Popular

Featured Cybersecurity

New Products

  • Genetec Security Center

    Genetec Security Center

    This major new release allows more system components to run in the cloud, reducing the gap between cloud and on-premises security systems. It also makes it easier to connect external systems and tap external data for use in dashboards, maps and investigations without relying on complex, specialized integrations. 3

  • VideoEdge 2U High Capacity Network Video Recorder

    VideoEdge 2U High Capacity Network Video Recorder

    Johnson Controls announces a powerful recording solution to meet demanding requirements with its VideoEdge 2U High Capacity Network Video Recorder. This solution combines the powerful capabilities of victor with the intelligence of VideoEdge NVRs, fueled by Tyco Artificial Intelligence, for video management that provides actionable insights to save time, money and lives. 3

  • Connect ONE’s powerful cloud-hosted management platform provides the means to tailor lockdowns and emergency mass notifications throughout a facility – while simultaneously alerting occupants to hazards or next steps, like evacuation.

    Connect ONE®

    Connect ONE’s powerful cloud-hosted management platform provides the means to tailor lockdowns and emergency mass notifications throughout a facility – while simultaneously alerting occupants to hazards or next steps, like evacuation. 3