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17 March 2023 α-RuCl3-based 2D heterostructures for nanoscale control of polaritons
Daniel J. Rizzo, Bjarke S. Jessen, Sara Shabani, Francesco L. Ruta, Zhiyuan Sun, Jin Zhang, Alexander S. McLeod, Carmen Rubio-Verdú, Matthew Cothrine, Jiaqiang Yan, Lede Xian, Kenji Watanabe, Takashi Taniguchi, Stephen E. Nagler, David G. Mandrus, Angel Rubio, Michael M. Fogler, Andrew J. Millis, James C. Hone, Cory R. Dean, Abhay N. Pasupathy, D. N. Basov
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Proceedings Volume PC12423, 2D Photonic Materials and Devices VI; (2023) https://doi.org/10.1117/12.2651181
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
The fundamental opto-electronic properties of two-dimensional (2D) materials can be tailored based on their nanoscale charge environment. Charge transfer at the interface of two atomically-thin layers offers a route to nanoscale charge modulation at the smallest possible length scales. In our study, we exploit this behavior to achieve nanoscale control of charge-transfer plasmon-polaritons (CPPs) and phonon-polaritons (PhPs) in graphene/α-RuCl3 and hBN/α-RuCl3 heterostructures, respectively. Using infrared near-field optical microscopy, we directly observe CPPs and PhPs, revealing emergent charge doping and optical conductivity at these novel 2D interfaces. Our results validate charge-transfer interfaces as tunable platforms for confined light.
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Daniel J. Rizzo, Bjarke S. Jessen, Sara Shabani, Francesco L. Ruta, Zhiyuan Sun, Jin Zhang, Alexander S. McLeod, Carmen Rubio-Verdú, Matthew Cothrine, Jiaqiang Yan, Lede Xian, Kenji Watanabe, Takashi Taniguchi, Stephen E. Nagler, David G. Mandrus, Angel Rubio, Michael M. Fogler, Andrew J. Millis, James C. Hone, Cory R. Dean, Abhay N. Pasupathy, and D. N. Basov "α-RuCl3-based 2D heterostructures for nanoscale control of polaritons", Proc. SPIE PC12423, 2D Photonic Materials and Devices VI, (17 March 2023); https://doi.org/10.1117/12.2651181
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KEYWORDS
Heterojunctions
Polaritons
Graphene
Doping
Interfaces
Near field optics
Optical microscopy
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