Featured Research

from universities, journals, and other organizations

Monolithic terahertz solid-state transceiver: Improved control of 'neglected middle-child' frequency range offers potential benefits

Date:
June 29, 2010
Source:
DOE/Sandia National Laboratories
Summary:
Researchers have taken the first steps toward reducing the size and enhancing the functionality of devices in the terahertz frequency spectrum. By combining a detector and laser on the same chip to make a compact receiver, the researchers rendered unnecessary the precision alignment of optical components formerly needed to couple the laser to the detector.

Sandia National Laboratories researchers have taken the first steps toward reducing the size and enhancing the functionality of devices in the terahertz (THz) frequency spectrum.

Related Articles


By combining a detector and laser on the same chip to make a compact receiver, the researchers rendered unnecessary the precision alignment of optical components formerly needed to couple the laser to the detector.

The new solid-state system puts to use the so-called "neglected middle child" frequency range between the microwave and infrared parts of the electromagnetic spectrum.

Terahertz radiation is of interest because some frequencies can be used to "see through" certain materials. Potentially they could be used in dental or skin cancer imaging to distinguish different tissue types. They also permit improved nondestructive testing of materials during production monitoring. Other frequencies could be used to penetrate clothing, and possibly identify chemical or biological weapons and narcotics.

Since the demonstration of semiconductor THz quantum cascade lasers (QCLs) in 2002, it has been apparent that these devices could offer unprecedented advantages in technologies used for security, communications, radar, chemical spectroscopy, radioastronomy and medical diagnostics.

Until now, however, sensitive coherent transceiver (transmitter/receiver) systems were assembled from a collection of discrete and often very large components. Similar to moving from discrete transistor to integrated chips in the microwave world and moving from optical breadboards to photonic integrated circuits in the visible/infrared world, this work represents the first steps toward reduction in size and enhanced functionality in the THz frequency spectrum.

The work, described in the current issue (June 27, 2010) of "Nature Photonics," represents the first successful monolithic integration of a THz quantum-cascade laser and diode mixer to form a simple, but generically useful, terahertz photonic integrated circuit -- a microelectronic terahertz transceiver.

With investment from Sandia's Laboratory-Directed Research and Development (LDRD) program, the lab focused on the integration of THz QCLs with sensitive, high-speed THz Schottky diode detectors, resulting in a compact, reliable solid-state platform. The transceiver embeds a small Schottky diode into the ridge waveguide cavity of a QCL, so that local-oscillator power is directly supplied to the cathode of the diode from the QCL internal fields, with no optical coupling path.

The Sandia semiconductor THz development team, headed by Michael Wanke, also included Erik Young, Christopher Nordquist, Michael Cich, Charles Fuller, John Reno, Mark Lee -- all of Sandia labs -- and Albert Grine of LMATA Government Services, LLC, in Albuquerque. Young recently joined Philips Lumileds Lighting Co., in San Jose, Calif.


Story Source:

The above story is based on materials provided by DOE/Sandia National Laboratories. Note: Materials may be edited for content and length.


Journal Reference:

  1. Michael C. Wanke, Erik W. Young, Christopher D. Nordquist, Michael J. Cich, Albert D. Grine, Charles T. Fuller, John L. Reno, Mark Lee. Monolithically integrated solid-state terahertz transceivers. Nature Photonics, 2010; DOI: 10.1038/NPHOTON.2010.137

Cite This Page:

DOE/Sandia National Laboratories. "Monolithic terahertz solid-state transceiver: Improved control of 'neglected middle-child' frequency range offers potential benefits." ScienceDaily. ScienceDaily, 29 June 2010. <www.sciencedaily.com/releases/2010/06/100629162551.htm>.
DOE/Sandia National Laboratories. (2010, June 29). Monolithic terahertz solid-state transceiver: Improved control of 'neglected middle-child' frequency range offers potential benefits. ScienceDaily. Retrieved April 1, 2015 from www.sciencedaily.com/releases/2010/06/100629162551.htm
DOE/Sandia National Laboratories. "Monolithic terahertz solid-state transceiver: Improved control of 'neglected middle-child' frequency range offers potential benefits." ScienceDaily. www.sciencedaily.com/releases/2010/06/100629162551.htm (accessed April 1, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Wednesday, April 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

7-Year-Old Girl Gets 3-D Printed 'robohand'

7-Year-Old Girl Gets 3-D Printed 'robohand'

AP (Mar. 31, 2015) Although she never had much interest in prosthetic limbs before, Faith Lennox couldn&apos;t wait to slip on her new robohand. The 7-year-old, who lost part of her left arm when she was a baby, grabbed it as soon as it came off a 3-D printer. (March 31) Video provided by AP
Powered by NewsLook.com
Dutch Architects Show Off 3D House-Building Prowess

Dutch Architects Show Off 3D House-Building Prowess

Reuters - Innovations Video Online (Mar. 31, 2015) Dutch architects are constructing a 3D-printed canal-side home, which they hope will spark an environmental revolution in the house-building industry. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
Solar Plane Stops in China

Solar Plane Stops in China

Reuters - News Video Online (Mar. 31, 2015) Solar Impulse 2 stops over in China&apos;s Chonqing, completing the fifth leg in its bid to become the first solar powered plane to travel around the globe. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Solar Impulse Lands in China After 20-Hour Flight from Myanmar

Solar Impulse Lands in China After 20-Hour Flight from Myanmar

AFP (Mar. 31, 2015) Solar Impulse 2 lands in China, the world&apos;s biggest carbon emitter, completing the fifth leg of its landmark global circumnavigation powered solely by the sun. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins