This thesis presents significant advances in the imaging and theory of the ultrafast dynamics of surface plasmon polariton fields. The author details construction of a sub-10 femtosecond and sub-10 nanometer spatiotemporal resolution ultrafast photoemission microscope which is subsequently used for the discovery of topological meron and skyrmion-like plasmonic quasiparticles. In particular, this enabled the creation of movies of the surface plasmon polariton fields evolving on sub-optical wavelength scales at around 0.1 femtosecond per image frame undergoing vortex phase evolution. The key insight that the transverse spin of surface plasmon polaritons undergoes a texturing into meron or skyrmion-like topological quasiparticles (defined by the geometric charge of the preparation) follows. In addition, this thesis develops an analytical theory of these new topological quasiparticles, opening new avenues of research, while the ultrafast microscopy techniques established within will also be broadly applicable to studies of nanoscale optical excitations in electronic materials.
By:
Yanan Dai Imprint: Springer Nature Switzerland AG Country of Publication: Switzerland Edition: 2020 ed. Dimensions:
Height: 235mm,
Width: 155mm,
Weight: 215g ISBN:9783030528386 ISBN 10: 3030528383 Series:Springer Theses Pages: 115 Publication Date:04 September 2021 Audience:
Professional and scholarly
,
Undergraduate
Format:Paperback Publisher's Status: Active
Chapter1: Introduction.- Chapter2: Experimental Methods.- Chapter3: Simulation Framework.- Chapter4: Propagating Surface Plasmon Polaritons (SPPs).- Chapter5: Spin Angular Momenta and Chirality of SPPs.- Chapter6: Plasmon Orbital Angular Momentum Generation.- Chapter7: Summary and Perspectives.
Yanan Dai is a postdoctoral researcher at Columbia University. He received his PhD from the University of Pittsburgh in 2019.