Info
Info
News Article

Scientists Create Nanowire FET THz Detectors

Novel solid-state nanomaterial platform enables terahertz photonics

A team of scientists from the Institute at CNR and Scuola Normale Superiore in Italy and CNRS-University  in France has created a novel solid-state technology that opens the door to the use of terahertz (THz) photonics in a wide range of applications. They reported their findings in the journal APL Materials.

By using an approach that exploits the excitation of plasma waves in the channel of field-effect transistors (FET), they were able to create the first FET detectors based on 1D InAs or InAs/InSb semiconductor nanowires, designed in a plethora of architectures - including tapers, heterostructures and metamaterial-antenna coupled. They also developed the first THz detectors made of mono- or bi-layer graphene.

"Our work shows that nanowire FET technology is versatile enough to enable 'design' via lithography of the detector's parameters and its main functionalities," explained Miriam Serena Vitiello, lead author of the paper as well as research scientist and group leader of Terahertz Photonics Group in the Nanoscience Institute at CNR and Scuola Normale Superiore in Pisa, Italy.

The nanowire detector offers "a concrete perspective of application-oriented use, since it operates at room temperature - reaching detection frequencies greater than 3 THz, with maximum modulation speed in the MHz range, and noise equivalent powers that are already competitive with the best commercially available technologies," Vitiello said.

Because the nanodetectors can be tapped for large-area fast imaging across both the THz and the sub-terahertz spectral ranges, their commercial potential lies in a variety of spectroscopic and real-time imaging applications - possibly in the form of fast multi-pixel THz cameras.

Next, the scientists' goals are to "push the device's performance in the ultrafast detection realm, explore the feasibility of single photon detection by using novel architectures and material choices, develop compact focal plane arrays, and to integrate on-chip the nanowire detectors with THz quantum cascade microlasers," noted Vitiello. "This will allow us to take THz photonics to a whole new level of 'compactness' and versatility, where it can finally begin to address many killer applications."

'One dimensional semiconductor nanostructures: an effective active-material for TeraHertz detection' by Miriam S. Vitiello et al,  APL Mat. 3, 026104 (2015) 



AngelTech Live III: Join us on 12 April 2021!

AngelTech Live III will be broadcast on 12 April 2021, 10am BST, rebroadcast on 14 April (10am CTT) and 16 April (10am PST) and will feature online versions of the market-leading physical events: CS International and PIC International PLUS a brand new Silicon Semiconductor International Track!

Thanks to the great diversity of the semiconductor industry, we are always chasing new markets and developing a range of exciting technologies.

2021 is no different. Over the last few months interest in deep-UV LEDs has rocketed, due to its capability to disinfect and sanitise areas and combat Covid-19. We shall consider a roadmap for this device, along with technologies for boosting its output.

We shall also look at microLEDs, a display with many wonderful attributes, identifying processes for handling the mass transfer of tiny emitters that hold the key to commercialisation of this technology.

We shall also discuss electrification of transportation, underpinned by wide bandgap power electronics and supported by blue lasers that are ideal for processing copper.

Additional areas we will cover include the development of GaN ICs, to improve the reach of power electronics; the great strides that have been made with gallium oxide; and a look at new materials, such as cubic GaN and AlScN.

Having attracted 1500 delegates over the last 2 online summits, the 3rd event promises to be even bigger and better – with 3 interactive sessions over 1 day and will once again prove to be a key event across the semiconductor and photonic integrated circuits calendar.

So make sure you sign up today and discover the latest cutting edge developments across the compound semiconductor and integrated photonics value chain.

REGISTER FOR FREE

VIEW SESSIONS

Info
×
Search the news archive

To close this popup you can press escape or click the close icon.
×
Logo
×
Register - Step 1

You may choose to subscribe to the Compound Semiconductor Magazine, the Compound Semiconductor Newsletter, or both. You may also request additional information if required, before submitting your application.


Please subscribe me to:

 

You chose the industry type of "Other"

Please enter the industry that you work in:
Please enter the industry that you work in:
 
X
Info
X
Info
{taasPodcastNotification}
Live Event