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Find out what's happening within the department. We invite you to explore our upcoming events.APMS Colloquium
Thursday, November 20, 9:45-10:45 am
Prof. Sean T Roberts
University of Texas at Austin
Reshaping Light via Up- and Down-Conversion
Abstract: Due to its ability to transmit energy and information through space, light plays a central role in nearly all aspects of human society. However, light has a peculiar property as its energy content is transmitted by photons, discrete particles whose energy must be matched to their intended application. Materials that reshape light, by combining the energy of multiple low-energy photons or by using single high-energy photons to produce multiple lower energy ones, can enable new light-driven technologies and optoelectronics. In this presentation, I will highlight work by my group to design hybrid structures that interface organic molecules with inorganic nanocrystals and bulk solids for the purpose of reshaping light's energy content. When properly assembled, these materials can facilitate photon up-conversion, the creation of higher energy photons from pairs of low-energy ones, which has applications for bioimaging, light detection, and additive manufacturing. With some small design changes, energy can be made to flow in the opposite direction in these structures, achieving photon down-conversion which can be used for solar energy harvesting, quantum information science, and catalysis. Much of the work that I will feature will focus on using ultrafast microscopy methods to track energy flow within these materials with femtosecond time-resolution and sub-micron spatial resolution.
Website: www.RobertsGroupUT.org
Communication (Building 16) Room 119.
Join Via Zoom: https://tinyurl.com/ColloqAPMSMIRA
Sponsored by:
- Center for Materials Interfaces in Research and Applications (¡MIRA!)
- Nanotechnology Collaborative Infrastructure Southwest (NCI-SW) and Arizona State University (ASU)
Colloquium Schedule Fall 2025
For a complete listing, please visit the current colloquium schedule.
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