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Volume 94, Issue 6, 15 September 2003
94(2003); http://dx.doi.org/10.1063/1.1604475View Description Hide Description
We have investigated nonalloyed Al/Pt ohmic contacts on -type ZnO:Al It is shown that the as-deposited Al/Pt contacts produce a specific contact resistivity of Auger electron spectroscopy and x-ray photoelectron spectroscopy depth profile results show interdiffusion between oxygen and aluminum, resulting in an increase of carrier concentrations near the ZnO surface. The increase of the carrier concentration at the surface region of ZnO is attributed to the low resistance of the nonalloyed Al/Pt contact.
94(2003); http://dx.doi.org/10.1063/1.1604476View Description Hide Description
Organic/inorganic hybridglass waveguides were fabricated by the sol-gel technique followed by direct ultraviolet patterning. The thermo-optic coefficient of the hybrid material was measured by a prism-coupling method and was found to be comparable to those of typical polymermaterials. In order to investigate the possibility of using this hybridglassmaterial as a thermo-optic waveguidematerial, a Mach–Zehnder interferometric optical switch was fabricated on a silicon wafer. At the wavelength of 1.55 μm, the switch response time was measured to be less than 4.2 ms, and the switching power was 9.3 mW. Experimental results show that this hybrid material is very suitable for application in integrated thermo-optic components.