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dc.contributor.advisor Swillam, Mohamed Abd-Allah, Rehab Kotb 2014-09-23T06:02:09Z 2014-09-23T06:02:09Z 2014 Fall en_US 2014-09-23
dc.description.abstract Manipulating light at nano-scale is usually shadowed by the diffraction limit. Recently, plasmonics have emerged as a new technology that enables confining light at nano-scale. Using plasmonic structures, photonic devices can be shrunk from the micro-scale to the nano-scale. In this thesis, a novel structure to a plasmonic nano-filter is introduced and analyzed. The proposed nano-resonator has low loss, compact size and good sensing characteristics. A closed form model to the filter behavior is developed. The model is extracted from the waveguide physical parameters and provides a physical insight into the structure of the filter. An analytical model to the propagation constant and the losses of Metal-Insulator-Metal plasmonic waveguide is proposed. This model is simple, accurate, and shows a good agreement with Finite Difference Time Domain (FDTD) simulations. The model provides a good methodology to obtain high quality filters using cascaded inline filtering. Novel mechanisms for tuning and controlling the response of the plasmonic filter are introduced. These mechanisms allow for full control on the transmission response from these waveguide based structures. This control can be done mechanically, electrically, or optically. Wideband tuning range has been obtained using these schemes. The mechanical tunability is based on changing the filter dimensions using Micro/Nano electro mechanical systems (MEMS/NEMS). The electrical and optical tunability is based on using a nonlinear dielectric material with Pockels or Kerr effect. The tunability is achieved by applying an external voltage or through controlling the input light intensity. The proposed nano-filter supports both red and blue shift in the resonance response. A new approach to control the input light intensity by applying an external voltage to a previous stage is investigated. Tuning the resonance wavelength with high accuracy, minimum insertion loss and high quality factor is obtained using these approaches. The proposed nano-filter can be used in various plasmonic applications such as sensing, biomedical diagnostics and on-chip interconnects. Plasmonic structures can also be used to design nano-optical tweezers. A novel structure for nano optical tweezers using plasmonic triple slit structure is introduced and analyzed. The tweezers have deep potential wells that can trap sub-10-nm dielectric particle stably and efficiently. The resultant 50KT potential well provides tight trapping to the particle. The proposed plasmonic structure allows for steering the particle by simply changing the angle of the incident plane. This simple control allows efficient manipulation to the trapped particle over a wide angle range. en_US
dc.format.extent 138 p. en_US
dc.format.medium theses en_US
dc.language.iso en en_US
dc.rights Author retains all rights with regard to copyright. en
dc.subject Nano filter en_US
dc.subject Plasmonic filter en_US
dc.subject Tunable filter en_US
dc.subject Modeling en_US
dc.subject Nano optical tweezers en_US
dc.subject Plasmonic optical tweezers en_US
dc.subject.lcsh Thesis (M.S.)--American University in Cairo en_US
dc.subject.lcsh Nanotechnology.
dc.subject.lcsh Optical tweezers.
dc.subject.lcsh Plasmons (Physics)
dc.title Manipulation of light in plasmonic nano-structures en_US
dc.type Text en_US
dc.subject.discipline Nanotechnology en_US
dc.rights.access This item is restricted for 2 years from the date issued en_US
dc.contributor.department American University in Cairo. School of Engineering Interdisciplinary Program en_US
dc.description.irb American University in Cairo Institutional Review Board approval is not necessary for this item, since the research is not concerned with living human beings or bodily tissue samples. en_US
dc.contributor.committeeMember Ismail, Yehea
dc.contributor.committeeMember Allam, Nageh
dc.contributor.committeeMember Attiya, Ahmed
dc.contributor.committeeMember Mamdouh, Wael

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  • Theses and Dissertations [1867]
    This collection includes theses and dissertations authored by American University in Cairo graduate students.

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