Linear and nonlinear optical response of 2D materials at nano-femto scale with ultrafast pump-probe force microscopy

Junghoon Jahng

doi:10.1117/12.3028366

4 October 2024 Linear and nonlinear optical response of 2D materials at nano-femto scale with ultrafast pump-probe force microscopy

Junghoon Jahng

Author Affiliations +

Proceedings Volume 13117, Enhanced Spectroscopies and Nanoimaging 2024; 131170S (2024) https://doi.org/10.1117/12.3028366
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

This work investigates the linear and nonlinear optical force between a sharp tip and a sample that had been photo-excited by using the time-resolved pump-probe force microscopy. By measuring this force, we are able to study the nonlinear polarization of the material. Our findings reveal that the ground state bleaching of excitons in 2-D materials is influenced by the same excited state dynamics observed in optical pump-probe experiments. We have demonstrated that ultrafast pump-probe force microscopy is a non-optical detection technique that can achieve nano-femto scale resolution, thus enhancing the sensitivity of pump-probe experiments to the point where they may be used for single-molecule studies.

Conference Presentation

Citation Download Citation

Junghoon Jahng "Linear and nonlinear optical response of 2D materials at nano-femto scale with ultrafast pump-probe force microscopy", Proc. SPIE 13117, Enhanced Spectroscopies and Nanoimaging 2024, 131170S (4 October 2024); https://doi.org/10.1117/12.3028366

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