Use this URL to cite or link to this record in EThOS:
Title: Flexible holographic metasurfaces
Author: Burch, James
ISNI:       0000 0004 7972 2179
Awarding Body: University of St Andrews
Current Institution: University of St Andrews
Date of Award: 2019
Availability of Full Text:
Access from EThOS:
Access from Institution:
Metasurface holography has attracted much attention in recent years because of its practical applications including anti-counterfeiting, sensing, and lensing. However, most metasurface holograms have been constrained to rigid substrates which limit their out-of-the-lab value. Flexible holographic metasurfaces offer increased post-fabrication tunability as they can be bent or stretched, can be conformed to real-world non-flat surfaces, and are compatible with commercially viable roll-to-roll fabrication methods. This thesis describes how flexible holographic metasurfaces can be fabricated, their utility, and the novel phenomena that arise from them. In particular, it details a hologram retrieval algorithm for non-flat surface topologies, and how the topography determines the resultant symmetry properties of the holographic image. Furthermore, this thesis outlines a concept for replacing the bulky and complicated optics required for light sheet fluorescent microscopy with a simple holographic metasurface illuminated by a collimated beam. Two plasmonic meta-atom designs, both operating in reflection, are presented here, one for the visible wavelength range using nanorods and Pancharatnam-Berry phase-shifting, and the other for the millimetre wavelength range using c-rings. Extending the tools available for holography paves-the-way for advances in this field.
Supervisor: Di Falco, Andrea Sponsor: Engineering and Physical Sciences Research Council (EPSRC) ; Defence and Security Accelerator (DASA), Ministry of Defence
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
Keywords: Holography ; Metasurfaces ; Metamaterials ; Conformable ; Flexible ; TA1542.B8 ; Fluorescence microscopy