Radio is made from atomic-scale defects in diamond
Researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have made the world’s smallest radio receiver – built out of an assembly of atomic-scale defects in pink diamonds.
This tiny radio — whose building blocks are the size of two atoms — can withstand extremely harsh environments and is biocompatible, meaning it could work anywhere from a probe on Venus to a pacemaker in a human heart.
The radio uses tiny imperfections in diamonds called nitrogen-vacancy (NV) centers. To make NV centers, researchers replace one carbon atom in a tiny diamond crystal with a nitrogen atom and remove a neighboring atom — creating a system that is essentially a nitrogen atom with a hole next to it. NV centers can be used to emit single photons or detect very weak magnetic fields. They have photoluminescent properties, meaning they can convert information into light, making them powerful and promising systems for quantum computing, phontonics and sensing.
Radios have five basic components — a power source, a receiver, a transducer to convert the high-frequency electromagnetic signal in the air to a low-frequency current, speaker or headphones to convert the current to sound and a tuner.
In the Harvard device, electrons in diamond NV centers are powered, or pumped, by green light emitted from a laser. These electrons are sensitive to electromagnetic fields, including the waves used in FM radio. When NV center receives radio waves it converts them and emits the audio signal as red light. A common photodiode converts that light into a current, which is then converted to sound through a simple speaker or headphone.
An electromagnet creates a strong magnetic field around the diamond, which can be used to change the radio station, tuning the receiving frequency of the NV centers.
Shao and Loncar used billions of NV centers in order to boost the signal, but the radio works with a single NV center, emitting one photon at a time, rather than a stream of light.
The radio is extremely resilient, thanks to the inherent strength of diamond. The team successfully played music at 350 degrees Celsius — about 660 Fahrenheit.
“Diamonds have these unique properties,” said Loncar. “This radio would be able to operate in space, in harsh environments and even the human body, as diamonds are biocompatible.”
Receive an email update when we add a new NANOELECTRONICS article.
The Latest on: Nanoelectronics
via Google News
The Latest on: Nanoelectronics
- Researchers discover new phase of nanoconfined wateron August 13, 2020 at 1:31 pm
Researchers at MIPT Laboratory of Terahertz Spectroscopy together with their Russian and international colleagues discovered a new phase of nanoconfined water; separate water molecules that are ...
- UC pioneers new brain cancer treatmenton August 6, 2020 at 5:00 pm
Steckl’s Nanoelectronics Laboratory applied an industrial fabrication process called coaxial electrospinning to form drug-containing membranes. The treatment is implanted directly into the part of the ...
- Why Self-Driving Cars Might Never Become A Commodityon July 30, 2020 at 4:03 am
CSO at imec, a world-leading R&D and innovation hub active in the fields of nanoelectronics and digital technologies. Studies from the American National Highway Traffic Safety Administration ...
- Telekom Malaysia provides R&D equipment worth MYR 3.5 million to universitieson July 28, 2020 at 5:01 pm
and Universiti Kebangsaan Malaysia (UKM)'s Institute of Microengineering and Nanoelectronics (IMEN). The most recent initiative was to rehome the Low Temperature Co-Fire Ceramic (LTCC) equipment ...
- Nanoelectronics learn the same way as the human brainon July 14, 2020 at 6:45 am
Especially activities in the field of artificial intelligence, like teaching robots to walk or precise automatic image recognition, demand ever more powerful, yet at the same time more economical ...
- Nanoelectronics learn the same way as the human brainon July 13, 2020 at 5:00 pm
(Nanowerk News) Especially activities in the field of artificial intelligence, like teaching robots to walk or precise automatic image recognition, demand ever more powerful, yet at the same time more ...
- Imec and GLOBALFOUNDRIES Announce Breakthrough in AI Chip, Bringing Deep Neural Network Calculations to IoT Edge Deviceson July 8, 2020 at 5:00 am
Leuven, Belgium, and Santa Clara, Calif., July 08, 2020 (GLOBE NEWSWIRE) -- Imec, a world-leading research and innovation hub in nanoelectronics and digital technologies, and GLOBALFOUNDRIES® (GF ...
- Nanoelectronics goes flat outon February 27, 2019 at 4:51 am
for applications in nanoelectronics. However, there is a crucial difference between the two: semiconducting nanotubes can have band gaps of about 1 eV, which effectively blocks the current in the ...
- Nanoelectronics – Nanotechnology in Electronicson September 26, 2017 at 8:03 am
The term nanoelectronics refers to the use of nanotechnology in electronic components. These components are often only a few nanometers in size. However, the tinier electronic components become, the ...
via Bing News