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
Smallest transistor worldwide switches current with a single atom in solid electrolyte
17.08.2018 | Karlsruher Institut für Technologie (KIT)
Protecting the power grid: Advanced plasma switch for more efficient transmission
17.08.2018 | DOE/Princeton Plasma Physics Laboratory
There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.
The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
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