2026-09-25T03:48:16Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/89422026-06-05T20:26:53Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023col_1721.1_131024
Leslie A. Kolodziejski.
Assefa, Solomon, 1979-
Massachusetts Institute of Technology. Dept. of Physics.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
2005-08-23T16:32:39Z
2005-08-23T16:32:39Z
2001
2001
http://hdl.handle.net/1721.1/8942
48984240
Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2001.
Includes bibliographical references (leaves 70-71).
A periodic arrangement of atoms in a crystal presents a periodic potential for electrons. The bragg diffraction of electrons from the atoms may lead to a band gap, which represents a range of frequencies the electrons cannot have in the crystal. An analogous effect takes place in photonic crystals, which are periodic arrangement of layers of dielectric media. Scattering at the interface of the different layers produces a band gap for photons. The current effort to make integrated optical chips requires guiding light around sharp corners with a radius of curvature on the order of a wavelength. Photonic crystals serve this purpose by providing efficient sharp bend waveguides. An array of defects in a photonic crystal localizes modes in the band gap. This effect is used to build linear and 900 bend waveguides.
by Solomon Assefa.
S.B.
M.Eng.
S.B.
71 leaves
4484656 bytes
4484413 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
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http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
Physics.
Design and fabrication of sharp bend photonic crystal slab waveguides
Thesis
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<Abstract>A periodic arrangement of atoms in a crystal presents a periodic potential for electrons. The bragg diffraction of electrons from the atoms may lead to a band gap, which represents a range of frequencies the electrons cannot have in the crystal. An analogous effect takes place in photonic crystals, which are periodic arrangement of layers of dielectric media. Scattering at the interface of the different layers produces a band gap for photons. The current effort to make integrated optical chips requires guiding light around sharp corners with a radius of curvature on the order of a wavelength. Photonic crystals serve this purpose by providing efficient sharp bend waveguides. An array of defects in a photonic crystal localizes modes in the band gap. This effect is used to build linear and 900 bend waveguides.</Abstract>
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