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Microscopic color converters move small laser-based devices closer to reality

Microscopic color converters move small laser-based devices closer to reality
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Chiara trovatelloJames schuckFabian mooshammerDmitri basovXinyi xuColumbia universityGiulio cerulloNature photonics

Columbia s top-cited researchers examine the value of high citations

Columbia’s top-cited researchers examine the value of high citations Beatrice Shlansky / Senior Staff Photographer As of 2020, Columbia had 45 scientists and social scientists ranked within the top 1 percent of the most cited researchers in their fields. Columbia bills itself as a major research university, and one such measurement of this label is the number of paper citations its researchers can claim. As of 2020, Columbia had 45 scientists and social scientists ranked within the top 1 percent of the most cited researchers in their respective fields. By this metric, the University has the 18th largest number of top-cited researchers in the world, according to recognized data by Web of Science.

New yorkUnited statesJingguang chenTomislav rovisEdward cookDonna farberDmitri basovNew york timesUniversity professor ruth defriesChemistry departmentPhysics departmentLamont doherty earth observatoryProfessor ruth defriesCentral indiaEngineering chair jingguang chenChemistry department chair tomislav rovis

A New Way to Program Light on an Ultra-Small Scale

Nature sets a limit on how tightly light can be focused. Even in microscopes, two different objects that are closer than this limit would appear to be one. But within a special class of layered crystalline materials known as van de Waals crystals these rules can, sometimes, be broken. In these special cases, light can be confined without any limit in these materials, making it possible to see even the smallest objects clearly. In their experiments, the Columbia researchers studied the van der Waals crystal called tungsten diselenide, which is of high interest for its potential integration in electronic and photonic technologies because its unique structure and strong interactions with light.

Aaron sternbachDmitri basovA new way to program lightColumbia universityNew wayProgram lightகொலம்பியா பல்கலைக்கழகம்புதியது வழிப்ரோக்ர்யாம் ஒளி

Switching nanolight on and off

E-Mail IMAGE: An optically excited gas of electronic carriers confined to the planes of the layered van-der Waals semiconductor tungsten diselenide is shown. The consequent hyperbolic response permits passage of nanolight. view more Credit: Ella Maru Studio A team of researchers led by Columbia University has developed a unique platform to program a layered crystal, producing imaging capabilities beyond common limits on demand. The discovery is an important step toward control of nanolight, which is light that can access the smallest length scales imaginable. The work also provides insights for the field of optical quantum information processing, which aims to solve difficult problems in computing and communications.

United statesSan diegoAaron sternbachDmitri basovUniversity of californiaMax planck institute for the structureUniversity of washingtonColumbia universityMax planck instituteCalifornia san diegoComputational quantum physics flatironஒன்றுபட்டது மாநிலங்களில்சான் டியாகோபல்கலைக்கழகம் ஆஃப் கலிஃபோர்னியாபல்கலைக்கழகம் ஆஃப் வாஷிங்டன்கொலம்பியா பல்கலைக்கழகம்