Hyperspectral (non)linear optical microscopy and nanoscopy of low-dimensional (quantum) materials

Patrick Z. El-Khoury

doi:10.1117/12.2675450

5 October 2023 Hyperspectral (non)linear optical microscopy and nanoscopy of low-dimensional (quantum) materials

Patrick Z. El-Khoury

Proceedings Volume PC12651, Low-Dimensional Materials and Devices 2023; PC1265108 (2023) https://doi.org/10.1117/12.2675450
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

This talk will highlight recent efforts in my group that are aimed at characterizing the vibrational and electronic properties of low-dimensional material systems with joint femtosecond temporal and nanometer spatial resolution. I will first discuss commonly used techniques, such as TERS and TEPL, with emphasis on our own contributions to this vibrant field of study. For instance, I will describe recent efforts that enabled the visualization of phonons in a hetero-bilayer of transition metal dichalcogenides (TMDs) with few-nm spatial resolution under ambient laboratory conditions. I will then describe non-standard approaches to tracking excitons in TMDs, e.g., through excitation-tunable electronic 4-wave mixing. Finally, I will describe measurements that rely on nonlinear and interferometric photoemission electron microscopy to enable femtosecond-nanometer visualization of exciton generation and decay in TMDs. Overall, my talk will approach the problem from a measurement science perspective, with an ultimate goal of contributing to this ever-expanding field through the development and deployment of novel state-of-the-art characterization tools that provide detailed insights into the fundamental physics and chemistry of TMDs and related systems.

Conference Presentation

Citation Download Citation

Patrick Z. El-Khoury "Hyperspectral (non)linear optical microscopy and nanoscopy of low-dimensional (quantum) materials", Proc. SPIE PC12651, Low-Dimensional Materials and Devices 2023, PC1265108 (5 October 2023); https://doi.org/10.1117/12.2675450

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