Scientists in Italy and France are pioneering the use of nanomaterials in compact, sensitive, extremely fast, low-cost terahertz detectors with tremendous potential in applications such as biomedical diagnostics, airport security screening and high data-rate wireless communication
Compact, sensitive and fast nanodetectors are considered to be somewhat of a “Holy Grail” sought by many researchers around the world. And now a team of scientists in Italy and France has been inspired by nanomaterials and has created a novel solid-state technology platform that opens the door to the use of terahertz (THz) photonics in a wide range of applications.
During the past decade, materials research has played an essential role in filling the THz gap, beginning with the development of THz quantum cascade lasers, which rely heavily on semiconductor heterostructured artificial nanomaterials. The development of THz spectroscopy, nanospectroscopy and THz imaging expanded the range of powerful tools for the characterization of a broad range of materials — including one-dimensional or two-dimensional semiconductors, biomolecules and graphene.
The missing piece? A complementary detection technology capable of fulfilling THz application-oriented needs in fields such as biomedical diagnostics, security, cultural heritage, quality and process controls, and high data-rate wireless communications that require ad hoc integrated generation and detection systems.
As the scientists report in the journal APL Materials, from AIP publishing, 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 semiconductor nanowires, designed in a plethora of architectures — including tapers, heterostructures and metamaterial-antenna coupled. While they were at it, 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.
What’s the nanowire detector capable of? It 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.
In terms of applications, because the nanodetectors can be tapped for large-area fast imaging across both the THz and the sub-terahertz spectral ranges, don’t be surprised to see them commercialized in the near future for a variety of spectroscopic and real-time imaging applications — possibly even in the form of fast multi-pixel THz cameras.
The Latest on: Terahertz Photonics
via Google News
The Latest on: Terahertz Photonics
- T-ray technology reveals what's getting under your skinon November 26, 2020 at 5:34 am
A new method for analyzing the structure of skin using a type of radiation known as T-rays could help improve the diagnosis and treatment of skin conditions such as eczema, psoriasis and skin cancer.
- Terahertz Technology Market Size, Share, Growth, Trends, Analysis and Forecast - 2025on November 24, 2020 at 2:16 am
Terahertz Technology Market is expected to ... Gentec Electro-Optics, Del Mar Photonics, Terasense, Toptica Photonics, Insight Product, Advanced Photoni o North America Market Size and/or Volume ...
- AAAS announces new Science Partner Journal, Ultrafast Scienceon November 18, 2020 at 9:15 am
Topics include but are not limited to: attosecond light sources, attosecond physics, ultrafast lasers and applications, ultrafast imaging, ultrafast spectroscopy, ultrafast diagnosis, ultrafast ...
- Global Terahertz Technology Market Size-Share Analysis and System Production (2020-2026) | Addressing the Potential Impact of COVID-19 by ZMRon November 17, 2020 at 6:12 pm
Digital Barriers Plc and Toptica Photonics AG.. involved in the global Terahertz Technology market along with the various features relating to the market players like company profiles, supply ...
- Japan researchers discover new method to detect early breast cancer smaller than 0.5 mmon November 6, 2020 at 5:06 pm
The research findings were published on Oct. 22 in the Journal of Physics: Photonics, an open access British journal specializing in physics. Terahertz radiation involves electromagnetic waves in ...
- Terahertz Spectrometers Market 2020 Growth Factor, Top Key Players with Business Overview, Share, Size, Types and Applications and Forecast to 2026on November 6, 2020 at 2:43 am
Nov 06, 2020 (The Expresswire) -- Global “Terahertz Spectrometers Market” research report includes sales growth rate comparison by type and applications, market size estimates, forecasts ...
- MIT and Waterloo announce high-power, portable QCLon November 4, 2020 at 7:34 am
The work is reported in Nature Photonics. Terahertz quantum cascade lasers, tiny chip-embedded semiconductor laser devices, were first invented in 2002, but adapting them to operate much above 200 K ...
- Researchers develop a high-power, portable terahertz laseron November 4, 2020 at 6:35 am
In a paper published in Nature Photonics ("High-power portable terahertz laser systems"), MIT Distinguished Professor of Electrical Engineering and Computer Sciences Qing Hu and his colleagues report ...
- New lasers that fire terahertz beams could propel medical imaging and contraband detectionon November 2, 2020 at 9:18 pm
But compact terahertz lasers have only worked at ultralow temperatures, limiting them mostly to laboratory settings. No longer. In today’s issue of Nature Photonics, researchers report creating ...
- Researchers develop a high-power, portable terahertz laseron November 2, 2020 at 10:48 am
In a paper published today in Nature Photonics, MIT Distinguished Professor of Electrical Engineering and Computer Sciences Qing Hu and his colleagues report that their terahertz quantum cascade laser ...
via Bing News