FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W637133066> ?p ?o ?g. }

• W637133066 abstract "In this thesis, a hybrid photorefractive liquid crystal cell structure with the addition of a thin 40nm Gold layer is proposed that demonstrates significant photorefractive control of Surface Plasmon Polaritons (SPP). The photorefractive effects are generated through optically controlling the conductivity of a ~100nm photoconducting poly-N-vinyl-carboxyl (PVK) layer. Therefore, when a potential is applied across the cell, the liquid crystal alignment and the SPP wavevector is able to be controlled with light. The aim for developing this device is for the eventual demonstration of SPP gain to offset the high optical losses and increase the characteristically short propagation length of SPP. The mechanism we intend to use to demonstrate gain is analogous to the asymmetric energy transfer in a wave mixing system for two laser beams used to typically characterise photorefractive materials. We first characterise the electrical and optical behaviour of the novel photorefractive plasmonic structure proposed with uniform illumination. Our system demonstrates a good photorefractive wavevector shift of 0.207µm-1 for a 1.24eV SPP; this shift is in excess of the FWHM of the SPP resonance in the attenuated total reflection spectrum (0.154µm-1). However, the electric behaviour of the system is found to be highly complex and cannot be fully characterised by an equivalent electrical circuit. In addition, due to electronic stability issues, we require a slow AC potential to demonstrate consistent photorefractive effects. In a step towards realising SPP gain, we then consider the SPP interaction with a refractive index grating written into the liquid crystal layer with the interference pattern of crossed laser beams. We find that a SPP is diffracted into additional SPP modes. Our investigation then determines the ideal parameters that maximise the energy transfer by examining the diffraction efficiency dependence of each variable of the system. The maximum energy transfer observed is 25.3±2.3% for a 1.05eV SPP from a 4µm grating. With the assistance of a numerical simulation of our system we present a series of qualitative and semi-analytical descriptions to describe the mechanisms behind the observed trends. We discover that the diffraction efficiency is dependent of three important effects; the orientation of the grating, the penetration depth of the SPP into the liquid crystal and the magnitude of the periodic electric field in the liquid crystal. In addition, to fully describe the quantitative values observed we must also consider the presence of a thin 100nm region of the liquid crystal near the photoconductor interface that does not strongly respond to the applied electric field due to anchoring forces." @default.
• W637133066 created "2016-06-24" @default.
• W637133066 creator A5078825161 @default.
• W637133066 date "2012-01-01" @default.
• W637133066 modified "2023-09-26" @default.
• W637133066 title "Energy transfer between surface plasmon polariton modes with hybrid photorefractive liquid crystal cells" @default.
• W637133066 hasPublicationYear "2012" @default.
• W637133066 type Work @default.
• W637133066 sameAs 637133066 @default.
• W637133066 citedByCount "0" @default.
• W637133066 crossrefType "dissertation" @default.
• W637133066 hasAuthorship W637133066A5078825161 @default.
• W637133066 hasConcept C106847996 @default.
• W637133066 hasConcept C109496249 @default.
• W637133066 hasConcept C110879396 @default.
• W637133066 hasConcept C120665830 @default.
• W637133066 hasConcept C121332964 @default.
• W637133066 hasConcept C13274807 @default.
• W637133066 hasConcept C136676167 @default.
• W637133066 hasConcept C150835508 @default.
• W637133066 hasConcept C155672457 @default.
• W637133066 hasConcept C171250308 @default.
• W637133066 hasConcept C192562407 @default.
• W637133066 hasConcept C25517290 @default.
• W637133066 hasConcept C2777813233 @default.
• W637133066 hasConcept C49040817 @default.
• W637133066 hasConcept C63131636 @default.
• W637133066 hasConceptScore W637133066C106847996 @default.
• W637133066 hasConceptScore W637133066C109496249 @default.
• W637133066 hasConceptScore W637133066C110879396 @default.
• W637133066 hasConceptScore W637133066C120665830 @default.
• W637133066 hasConceptScore W637133066C121332964 @default.
• W637133066 hasConceptScore W637133066C13274807 @default.
• W637133066 hasConceptScore W637133066C136676167 @default.
• W637133066 hasConceptScore W637133066C150835508 @default.
• W637133066 hasConceptScore W637133066C155672457 @default.
• W637133066 hasConceptScore W637133066C171250308 @default.
• W637133066 hasConceptScore W637133066C192562407 @default.
• W637133066 hasConceptScore W637133066C25517290 @default.
• W637133066 hasConceptScore W637133066C2777813233 @default.
• W637133066 hasConceptScore W637133066C49040817 @default.
• W637133066 hasConceptScore W637133066C63131636 @default.
• W637133066 hasLocation W6371330661 @default.
• W637133066 hasOpenAccess W637133066 @default.
• W637133066 hasPrimaryLocation W6371330661 @default.
• W637133066 hasRelatedWork W1637577916 @default.
• W637133066 hasRelatedWork W1977044097 @default.
• W637133066 hasRelatedWork W1978790782 @default.
• W637133066 hasRelatedWork W1982207268 @default.
• W637133066 hasRelatedWork W1998199047 @default.
• W637133066 hasRelatedWork W2008759199 @default.
• W637133066 hasRelatedWork W2009316306 @default.
• W637133066 hasRelatedWork W2015647925 @default.
• W637133066 hasRelatedWork W2020917082 @default.
• W637133066 hasRelatedWork W2025713188 @default.
• W637133066 hasRelatedWork W2027386190 @default.
• W637133066 hasRelatedWork W2047420975 @default.
• W637133066 hasRelatedWork W2106604345 @default.
• W637133066 hasRelatedWork W2119624472 @default.
• W637133066 hasRelatedWork W2124977705 @default.
• W637133066 hasRelatedWork W2154184195 @default.
• W637133066 hasRelatedWork W2172248727 @default.
• W637133066 hasRelatedWork W2478230258 @default.
• W637133066 hasRelatedWork W2170342363 @default.
• W637133066 hasRelatedWork W3141364399 @default.
• W637133066 isParatext "false" @default.
• W637133066 isRetracted "false" @default.
• W637133066 magId "637133066" @default.
• W637133066 workType "dissertation" @default.