About Us

We are a multidisciplinary research group. Our aim is to characterize, understand and control light-matter interactions, with a focus on sensing, engineering and exploiting novel quantum and optoelectronic properties emerging from nanostructures and interfaces. This offers unprecedented opportunities for developing innovative material and device functionalities that rely on dynamic, local manipulation of single photons and charge carriers.  We gain our knowledge by correlating spatially-dependent physical properties (e.g. electronic structure, excitonic interactions) with chemical information (e.g. molecular composition, reaction rates and dynamics) and morphological structure (e.g. strain, phase).

This work is enabled by new sensing and spectroscopic methods that we are continuously developing. Our approaches are typically grounded in (nano)optical, scan-probe, and single-molecule imaging techniques, which provide unique access to behavior at relevant length and time scales in real environments encountered in energy and biological applications.

Recent Publication

Image of the Columbia crown written using photoswitchable photon avalanching nanoparticles

Indefinite and bidirectional near-infrared nanocrystal photoswitching

Changhwan Lee, Emma Z Xu, Kevin WC Kwock, Ayelet Teitelboim, Yawei Liu, Hye Sun Park, Benedikt Ursprung, Mark E Ziffer, Yuzuka Karube, Natalie Fardian-Melamed, Cassio CS Pedroso, Jongwoo Kim, Stefanie D Pritzl, Sang Hwan Nam, Theobald Lohmueller
Jonathan S Owen, Peter Ercius, Yung Doug Suh, Bruce E Cohen, Emory M Chan, P. James Schuck