Correlation between Carrier Dynamics and Tailored Optical Properties in Active Plasmonic Metasurfaces
Author(s)
Kim, Andrew Sungwook
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Abstract
The objective of this research is to design all-optically tunable plasmonic metasurface platforms
for both understanding and demonstrating tailored transient optical properties driven by ultrafast
hot-carrier excitation and relaxation processes. Contrary to the impressions of hot-carrier dynamics
being a material response, although limited, the transient process can be controlled to take action
in a desired manner. Furthermore, the modulation depth and temporal characteristics of the
resultant optical transient induced by hot-carrier dynamics is determined via the mutual interplay
between the characteristics of the optical resonance modes and carrier dynamics. Thus, a
fundamental understanding of the elementary features of hot-carrier-driven active metasurfaces is
of great importance. In this work, the acquired fundamental knowledge was simultaneously
leveraged for enhancing the performance measures of the active device and achieving novel optical
features such as chiroptical response. The design principles provided in this research can be
utilized to construct device components for system-level integration enabling novel functionalities.
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Date
2023-10-03
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Text
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Dissertation