Do you think your computer is fast enough? Think again. The computers of the future could work almost at the speed of light!
Nanophotonics, the study of light at the nanometer scale, could indeed bring the speed of our technology to a completely different level. The Center for Integrated Nanostructure Physics (CINAP) within the Institute for Basic Science (IBS) have developed three key components of a circuit that works with light. Published in Nature Communications, these devices combine the advantages of photonics and electronics on the same platform.
While we are slowing approaching the end point of Moore’s Law: a state where we physically cannot shrink the dimension of our transistors much further; the future of big data processing requires high performance computers with higher speed operations. Researchers reckon that if we build computers that process information through light, instead of electrons, computers will be able to work faster. However, at nanometer dimensions, the wavelength of light is larger than the diameter of the silicon fiber and for this reason some light can be lost. A solution to control the propagation of light in matter can come from surface plasmons. These are electromagnetic waves that propagate along the surface of some conductive materials like silver, gold, aluminum and copper. Using surface plasmons, optical information can be transmitted nearly at the speed of light and in extremely miniature volumes.
Using surface plasmons in silver nanowires and 2D semiconductors like molybdenum disulphide (MoS2), IBS scientists built three key components for optical communication: optical transistors, optical multiplexers and optical signal detectors.
These devices work thanks to a phenomenon called plasmon-exciton-plasmon interconversion.
IBS scientists constructed the optical transistor by interconnecting the silver nanowire to a flake of MoS2. Light shone on the device is converted to surface plasmon, than to exciton, back to surface plasmon and eventually emitted as light with a shorter wavelength compared to the initial input. For example, if the input light is green, the output light can be red.
Wavelength multiplexing devices were realized in a similar way, but instead of having only a flake of MoS2, the researchers used an array of three different 2D semiconductor materials emitting light at different wavelengths. In this structure, for example, a single input light (violet color) generates three output lights (blue, green and red).
The propagating optical signals along the silver nanowire can be also transformed and detected as electrical signals by an optical signal detector.
“The originality of this paper arises from the exciton-plasmon interconversion. We published before the conversion of exciton to plasmon, and from plasmon to exciton using silver nanowire/2D semiconductor hybrids, but this is the first time that we can complete the circle going from plasmons to excitons and back to plasmons. Using this concept, we created optical transistors and multiplexers,” explains professor Hyun Seok Lee, first author of this study.
Learn more: Squeezing Light Into New Miniature Devices
Receive an email update when we add a new OPTICAL CIRCUIT article.
The Latest on: Optical circuit
via Google News
The Latest on: Optical circuit
- Ultracold atoms put high-temperature superconductors under the microscopeon November 27, 2020 at 10:13 am
Physicists have deployed a Bose-Einstein condensate (BEC) as a “quantum microscope” to study phase transitions in a high-temperature superconductor. The experiment marks the first time a BEC has been ...
- Optical interconnects have no advantageson November 27, 2020 at 6:24 am
According to him, theoretical maximum speeds for electrical interconnects on integrated circuits and circuit boards are well in line with what can be achieved with optical technology. Whilst ...
- Rockley Photonics: Bold Plans In Tough Timeson November 26, 2020 at 8:18 am
How an up and coming silicon photonics start-up plans to take on a soon-to-be multi-billion dollar industry. By Rebecca Pool. Earlier this year, UK-based Rockley Photonics won $50 million in ...
- Global Optical Polyester Film Market 2020-2024: Size, Share, Emerging Trends, Demand, Revenue and Forecasts Researchon November 24, 2020 at 7:55 pm
The report outlines the competitive framework of the “Optical Polyester Film Market” industry detailing the SWOT ...
- Money For Everythin’on November 23, 2020 at 5:30 am
Will pure-play LiDAR companies succeed in disrupting the price-performance equation as LiDAR becomes an enabling technology for ADAS and AVs? Or will the automotive Tier 1s continue to dominate as ...
- USA v. Andersonon November 22, 2020 at 10:35 pm
Appellants, father and son, owned and worked at an optical and hearing aid business and were indicted for conspiracy to commit health care fraud, health care fraud, and aggravated identity theft in ...
- Lightwave Logic Announces Receipt of Innovative Direct Drive Fiber Communications Patenton November 20, 2020 at 4:31 am
PRNewswire/ -- Lightwave Logic, Inc. (OTCQB: LWLG), a technology platform company leveraging its proprietary electro-optic polymers to transmit data at ...
- Room-temperature electrically pumped nanolaser is designed for photonic integrated circuitson November 17, 2020 at 7:11 am
An electrically pumped nanolaser with a ring-shaped cavity promises to serve as the intrachip datalink in ultrahigh-speed computer chips.
- Optical Storage Device Market: Industry Trends and Challenges to Drive Sector Forwardon November 16, 2020 at 5:10 am
Optical Storage Device market report has been added to the Market Growth Insight with addition of the recent news and developments taken place in the market. The Optical Storage Device market is ...
via Bing News