Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13312
Title: Optical waveguiding in epitaxial Sr1.8Ca0.2NaNb5O15 films integrated on Si(001) substrates
Authors: Liu, WC
Mak, CL 
Wong, KH
Issue Date: 2007
Publisher: Institute of Physics Publishing
Source: Journal of physics. D, Applied physics, 2007, v. 40, no. 3, p. 749-753 How to cite?
Journal: Journal of physics. D, Applied physics 
Abstract: Epitaxial tetragonal tungsten-bronze structure Sr1.8Ca0.2NaNb5O15 (SCNN) thin films of 650 nm thick have been grown on Si(001) substrates for the first time using pulsed laser deposition. The large lattice mismatch between SCNN films and Si substrates was overcome by making use of a MgO/TiN buffer layer. Excellent optical waveguiding properties of these SCNN films have been demonstrated using a prism-coupling technique. The ordinary and extraordinary refractive indices at 632.8 nm were calculated to be 2.2141 and 2.1727, respectively, implying a large birefringence of 0.0414. A propagation loss of 1.7 dB cm(-1) was measured in our waveguides. Our studies suggest that the SCNN/MgO/TiN/Si heterostructure is an ideal candidate for integrated optical waveguide applications.
URI: http://hdl.handle.net/10397/13312
ISSN: 0022-3727
EISSN: 1361-6463
DOI: 10.1088/0022-3727/40/3/009
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