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
Astronomers find unexpected, dust-obscured star formation in distant galaxy
24.03.2017 | University of Massachusetts at Amherst
Gravitational wave kicks monster black hole out of galactic core
24.03.2017 | NASA/Goddard Space Flight Center
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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24.03.2017 | Physics and Astronomy