Utilizing nanomanufacturing processes, the researchers were able to develop an optical microlens with a step-like surface, instead of a smooth surface, that has the capacity to operate at infrared frequencies using the novel phenomenon of negative index refraction.
The team of researchers involved with this project includes Wentao Lu, Ph.D., Bernard Didier F. Casse, Ph.D., and Yongjiang Huang, all from Northeastern. Their findings were published in a recent edition of the journal, Applied Physics Letters.
By using nanolithography, a manufacturing technique used for electronic circuits, the team was able to fabricate this planoconcave lens in the nanoscale. These microlenses function in the infrared frequency range, which is used for optical communications, and use the novel phenomenon of negative refraction, which is not found to occur in natural materials, but can be created in artificial metamaterials. Microlenses are a critical component of optoelectronic devices, which utilize the flow of light rather than of conventional currents as is used in conventional electronics. The technology of these optical circuits has the capacity to create superior devices for data capturing and storage, and for producing high quality, high pixel count images.
“These nano-optical components are essential for superior optical transmission and reception of data that will be used in the future generation of imaging and communication devices,” explained Sridhar. “Our ultimate goal is to integrate both optical and electronic devices onto a single chip, creating a single platform that utilizes both light and electrons with the potential to significantly increase the quality of circuits that are at the heart of all digital electronic devices today.”
Founded in 1898, Northeastern University is a private research university located in the heart of Boston. Northeastern is a leader in interdisciplinary research, urban engagement, and the integration of classroom learning with real-world experience. The university’s distinctive cooperative education program, where students alternate semesters of full-time study with semesters of paid work in fields relevant to their professional interests and major, is one of the largest and most innovative in the world. The University offers a comprehensive range of undergraduate and graduate programs leading to degrees through the doctorate in six undergraduate colleges, eight graduate schools, and two part-time divisions.
Jenny Eriksen | Newswise Science News
IceCube experiment finds Earth can block high-energy particles from nuclear reactions
24.11.2017 | Penn State
New proton record: Researchers measure magnetic moment with greatest possible precision
24.11.2017 | Johannes Gutenberg-Universität Mainz
High-precision measurement of the g-factor eleven times more precise than before / Results indicate a strong similarity between protons and antiprotons
The magnetic moment of an individual proton is inconceivably small, but can still be quantified. The basis for undertaking this measurement was laid over ten...
Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...
The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
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