Thz generation and enhancement toward nonlinear optical studies of quantum materials
Perry, Andrea
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https://hdl.handle.net/2142/113497
Description
Title
Thz generation and enhancement toward nonlinear optical studies of quantum materials
Author(s)
Perry, Andrea
Contributor(s)
Goddard, Lynford
Issue Date
2021-05
Keyword(s)
Quantum Materials
High-Field THz
Magnetic Switching
Floquet Engineering
Abstract
Developing sources of electromagnetic radiation in the terahertz (THz) frequency regime is of
current interest for probing and controlling various degrees of freedom in quantum materials on
their intrinsic energy scales. The strength of the THz electric field is a key parameter towards
dynamic control of quantum materials, but for such studies in the strongly coupled regime, sufficient
THz electric field amplitudes (>1 MV/cm) have typically only been achieved in super-radiant
linear accelerators or low-gain free-electron lasers. This thesis demonstrates two complimentary
approaches towards achieving high amplitude THz fields: the generation of THz pulses through
tilted-pulse-front excitation in LiNbO3 and subsequent near-field enhancement of the generated
THz pulses via resonant metamaterial structures. Our setup demonstrates a custom scheme for
measuring the near-field enhancement of incident THz electric fields resultant from patterned
metamaterial structures with micron-scale resolution and provides preliminary results for the
characterization of the near-field enhancement in an isolated bow-tie resonator. A new design for
hybrid plasmonic resonator-photonic cavity was also explored via finite element simulations towards
further enhancement of the THz electric field for multi-cycle THz sources. The work laid out in this
thesis provides a proof-of-principle scheme towards demonstrating table-top sources of strong THz
radiation for nonlinear optical experiments.
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