INRS overcomes a hurdle in the development of terahertz lasers

Mar 07, 2013

Dr. Roberto Morandotti and his team at the INRS Énergie Matériaux Télécommunications Research Centre have developed a device that is critical to the use of terahertz (THz) sources for a variety of applications.

Their electromagnetic non-reciprocal isolator is the subject of a recent article in Nature Communications, showing just how important this new development is. Until now, no isolator existed that was effective in the THz region of the spectrum, a situation that held back the development of certain technologies. The new device paves the way for applications using including the development of terahertz lasers and amplifiers, to which the scientific community is currently devoting much attention.

Recent advances in the field of THz wave sources and detectors have spurred the development of imaging, communications, and spectroscopy technologies—these last used in the detection of explosives. All these technologies use bandwidths for which current isolators are not suitable.

An isolator is needed to prevent reflected waves from distorting measurements or damaging other components. Thus the absence of a workable isolator represented a major limitation to the use of THz wave sources. Dr. Morandotti's work at INRS provides the first solution to this problem, using a strontium (SrFe12O19) magnet, which has the additional benefit of requiring no .

Explore further: World's first photonic pressure sensor outshines traditional mercury standard

More information: The article, entitled "A magnetic non-reciprocal isolator for broadband terahertz operation," appeared March 5, 2013, in Nature Communications (4:1558, DOI: 10.1038/natcomms2572).

add to favorites email to friend print save as pdf

Related Stories

Terahertz imaging goes the distance

Apr 26, 2007

Terahertz (THz) radiation, or far-infrared light, is potentially very useful for security applications, as it can penetrate clothing and other materials to provide images of concealed weapons, drugs, or other objects. However, ...

Photonics: strong vibrations

May 10, 2012

A new approach to generating terahertz radiation will lead to new imaging and sensing applications. The low energy of the radiation means that it can pass through materials that are otherwise opaque, opening ...

Using terahertz imaging to seek quirks in corks at NJIT

Dec 08, 2010

As the holidays approach and you're buying wine, ever wonder what's really in a cork? Ask NJIT's John Federici, who has a new use for Terahertz imaging: searching for divots and cracks in wine corks to insure quality.

Graphene may open the gate to future terahertz technologies

Sep 12, 2011

Nestled between radio waves and infrared light is the terahertz (THz) portion of the electromagnetic spectrum. By adding a nanoscale bit of graphene, researchers have found a better way to tune radiation for a THz transmitter.

Recommended for you

Formula could shed light on global climate change

2 hours ago

Wright State University researchers have discovered a formula that accurately predicts the rate at which soil develops from the surface to the underlying rock, a breakthrough that could answer questions about ...

New world record for a neutron scattering magnet

3 hours ago

A unique magnet developed by the Florida State University-headquartered National High Magnetic Field Laboratory (MagLab) and Germany's Helmholtz Centre Berlin (HZB) has reached a new world record for a neutron ...

The science of charismatic voices

21 hours ago

When a right-wing Italian politician named Umberto Bossi suffered a severe stroke in 2004, his speech became permanently impaired. Strangely, this change impacted Bossi's perception among his party's followers—from appearing ...

Urban seismic network detects human sounds

21 hours ago

When listening to the Earth, what clues can seismic data reveal about the impact of urban life? Although naturally occurring vibrations have proven extremely useful to seismologists, until now the vibrations ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.