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Thesis
Design and application of plasmonic devices
Master of Science (M.S.), Drexel University
Aug 2008
DOI:
https://doi.org/10.17918/etd-2916
Abstract
Surface Plasmon Polaritons (SPPs) are quantized charge density oscillations that occur at the interface between a metal and a dielectric when a photon couples to the free electron gas of the metal. The extraordinary properties of SPPs allow for sub-diffraction limit waveguiding and localized field enhancement, neither of which are achievable by any other means. The emerging field of Surface Plasmonics has applied SPP coupling to a number of new and interesting applications, such as: Surface Enhanced Raman Spectroscopy (SERS), Super Lenses, nano-scale optical circuits, optical filters, photonic band gap structures, biological and chemical sensing, and SPP enhanced photodetectors. The focus of this thesis is on the modeling, design and fabrication of plasmonic devices. A comparison of different models for the dielectric function of the metal, gold in this case, in optical frequencies is presented for the purpose of accurately modeling metallic dispersion through Finite-Difference Time-Domain (FDTD) simulations. The fabrication, measurement, and simulation of SPP Bragg grating coupling devices are performed for both linear and circular geometries. Finally, these gratings are added to the two gold contacts of a metal-semiconductor-metal photodetector designed on Gallium Arsenide for an operating wavelength of 830 nm to create a SPP enhanced Photodetector. The device is optimized using FDTD simulations to maximize the field enhancement, fabricated by E-beam lithography and tested with femtosecond time response studies.
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Details
- Title
- Design and application of plasmonic devices
- Creators
- Richard Grote - DU
- Contributors
- Bahram Nabet (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Master of Science (M.S.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Resource Type
- Thesis
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Electrical (and Computer) Engineering [Historical]; Drexel University
- Other Identifier
- 2916; 991014632548504721