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