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Hot Nanophotonics: Light with a Phase Transition
Among many emerging technologies, energy and display are two important technologies poised to revolutionize our current society. Nanophotonics holds the key to both these emerging technologies. While tunable devices enable 3D displays and other display applications, hot nanophotonic devices enable efficient energy conversion. Phase transition phenomena arising from the collective behavior of materials enable both these classes of devices. An electronic phase transition leads to a huge optical tunability, while an optical one results in highly selective thermal emitters for efficient thermophotovoltaics. This talk will describe tunable nanophotonic devices based on charge density waves in 1T-tantalum disulfide and frequency-selective thermal emitters based on non-Hermitian nanophotonics.

In this webinar hosted by the Nanophotonics Technical Group, Guru Naik from Rice University will first describe an optical phase transition in a non-Hermitian nanophotonic device where optical losses enable a novel functionality – sculpting thermal radiation from hot surfaces in an unprecedented manner. Bright and spectrally narrow thermal emission from non-Hermitian emitters enable efficient heat-to-light-to-electricity conversion. The second half of the webinar will focus on a novel tunable optical material, 1T-TaS2. The tunability arises from an electronic phase transition in this 2D quantum material. A MHz, unity order index tuning just by shining 1-Sun intensity white light is promising for low-power adaptive optical applications on mobile platforms.

Subject Matter Level: Intermediate - Assumes basic knowledge of the topic

What You Will Learn:
• Optical properties of materials
• Phase transition from many-body effects
• Nanophotonic devices

Who Should Attend:
• Anyone interested in nanophotonics, devices, and optical materials

Aug 5, 2021 08:00 AM in Eastern Time (US and Canada)

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Guru Naik
@Rice University
Gururaj (Guru) Naik is an assistant professor at Electrical & Computer Engineering, Rice University. He received an M.E. from the Indian Institute of Science, India, and a PhD from Electrical & Computer Engineering, Purdue University. During his PhD with Shalaev and Boltasseva groups, he developed new plasmonic materials for nanophotonic applications. After pursuing postdoctoral research at Stanford University, Guru joined Rice University in 2016. His research group focuses on topics at the interface of quantum, nanophotonics, and materials. Guru is a recipient of the IEEE Photonics Society Graduate Student Fellowship, an Outstanding Graduate Research Award from Purdue University, and a Gold Medal from the Indian Institute of Science.