Plasmonic Devices and Applications – Magnetic Lenses Logic Gates and Electron Accelerators

Abstract

In this dissertation the simulation software VORPAL is be used to study We will perform numerical simulations and theoretical analyses for plasmonic devices and applications There are three parts: Magnetic Lenses Logic Gates and Electron Accelerators All devices we investigated are composed of metal-dielectric-metal (MDM) or quasi-MDM structures Magnetic Lenses: In this work the semiconductor-glass waveguide arrays are used The cyclotron frequency will be produced by interacting with the internal free electrons of semiconductor and external magnetic fields The relationship of magnetic field intensity and the distance is the inverse square So the semiconductor arrays have different cyclotron frequencies at the different positions and the semiconductor layers’ refractive will have the characteristic with gradient index With this method it is possible to control the magnetic field distribution to have the different position of focus when light is traveling in the structure Logic Gates: In this study the signal processing in three-port and four-port plasmonic filter and coupler devices by coherently controlling the phases and amplitudes of incident surface plasmons is investigated This device is composed of two MDM waveguides with a strip cavity imbedded in the shared metal layer Various functions of signal processing such as signal modulation signal recovery filtering and plasmon-induced transparency (PIT) are proposed and examined All-optical logic gates based on the proposed devices are also designed and verified Electron Accelerators: The electron beam passes through a parallel plate structure which is composed of two metal-dielectric-metal structures We study the electron energies which are effected by different frequencies amplitudes and different times at one cycle of incident surface plasmon And the different dielectric constant also effects the energy of electron beam In this study the effects of various parameters will be discussed in detail on electron energies

Date of Award	2017 Feb 14
Original language	English
Supervisor	Yung-Chiang Lan (Supervisor)