Paper 13139-17
Paper 13139-17
Nonlinear exciton-polariton dynamics through classical and quantum spectroscopy (Invited Paper)
19 August 2024 • 8:00 AM - 8:25 AM PDT | Conv. Ctr. Room 11B
Abstract
Exciton-polaritons are bosonic quasi-particles generated through the strong coupling of optical excitations in a semiconductor with a resonant mode of a microcavity. While the exciton-polaritons enable manifestation of collective quantum phenomena, the emergence of coherent dynamics of polaritons essential to drive such processes is dependent on their nonlinear many-body interactions. Here we will discuss the dynamics of such interactions measured through nonlinear optical probes based on ultrashort optical pulses in strongly-coupled microcavities made of organic molecules and those that are based on two-dimensional metal halides. In addition, we present an alternative methodology reliant on spectrally entangled biphoton states as a probe of such many-body dynamics.
Presenter
Wake Forest Univ. (United States)
Dr Ajay Ram Srimath Kandada received his PhD in Physics from Politecnico di Milano, Italy in 2013 for his work on ultrafast spectroscopy of organic photovoltaic materials. He subsequently moved to the Italian Institute of Technology as a post-doctoral researcher to investigate bulk metal-halide perovskites' excited state dynamics and defect physics. In 2016, he received the Marie Sklodowska Curie global fellowship from the European Commission to investigate coherent exciton dynamics using advanced optical spectroscopies at the University of Montreal (Canada), Georgia Institute of Technology (USA) and at the Italian Institute of Technology (Italy). He was appointed Adjunct Assistant Professor at Wake Forest University in 2020 and later tenure-track Assistant Professor in 2022. His research interests include the electronic and optical properties of emerging semiconductors probed by nonlinear ultrafast spectroscopy and quantum-optical methods.