comment on this article

MEMS based terahertz modulator has wide operating range

A broadband modulator developed at UCLA's School of Engineering and Applied Science could lead to more advanced medical and security imaging systems.

The modulator is based on an artificial metasurface. Developed by a team led by Professor Mona Jarrahi, the metasurface comprises an array of MEMS units that can be opened and closed by applying a voltage. This action encodes an incoming terahertz wave into a corresponding series of zeroes or ones, which can then transformed into images.

"Our metasurface broadens the realm of metamaterials to broadband operation for the first time and diminishes many of the fundamental physical constraints in routing and manipulating terahertz waves, especially in terahertz imaging and spectroscopy systems," Prof Jarrahi said. "Our device geometry can switch from an array of microscale metallic islands to an array of interconnected metallic loops, altering its electromagnetic properties from a transparent surface to a reflecting surface, which manipulates the intensity of terahertz waves passing through over a broad range of frequencies."

The terahertz band is seen to be attractive for medical imaging and chemical sensing, but current metamaterial based modulators have only have a narrow band of operation. The UCLA device is said to perform across a wide range of the terahertz band with high efficiency and signal clarity.

Author
Graham Pitcher

Comment on this article


This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

What you think about this article:


Add your comments

Name
 
Email
 
Comments
 

Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles

Long range radio SoC

A low power wide area multistandard radio chip developed by imec and Holst ...

The fabric of life?

E-textiles or smart garments, smart clothing, electronic textiles, smart ...

Crossing the chasm

When Freescale started work on magnetic random access memory (MRAM) two decades ...

Get to market faster

A quick look at using Vicor's PFM and AIM in VIA packaging for your AC to Point ...

Fit for service

There are some truly exciting opportunities on the horizon. Over recent years, ...

Intel looks to IoT

Intel has built its business on domination of the PC market. Over the years, ...

Hardware development

In today’s fast-paced, connected world, the need for more capable and adaptable ...

Keeping standards high

Engineers – at least those who are worth their salt – ask questions. And those ...