Thin Films of Ferroelectrics Made by Pulsed Laser Deposition for Optoelectronic Applications
- PDF / 1,134,776 Bytes
- 6 Pages / 414.72 x 648 pts Page_size
- 38 Downloads / 180 Views
n2no
Polished Fiber Block
Figure 1. Schematic diagram showing the evanescent field coupling of a polished optical fiber to a high index optoelectronic multimode overlay. For this work, the optoelectronic overlay is a thin ferroelectric film on a semi-infinite quartz substrate. The refractive index of: the cladding is n1 , the fused silica core is neff (neff = 1.450), the multimode waveguide is no, and the substrate is n 2 (n2 = 1.447). When the multimode waveguide is a single crystal, n 2 is the refractive index for air. Pulsed laser deposition (PLD) is a technique that has been applied to many electronic ceramic materials. 7 Almost all applications of PLD-deposited electronic ceramic films have been for thin films on planar, single crystal substrates. The latter is due, in part, to the anisotropic nature of the desired properties. Recently, PLD has been applied to the epitaxial growth of BaTiO 3 193 Mat. Res. Soc. Symp. Proc. Vol. 397 ©1996 Materials Research Society
and Pbl-x/1,oLax/1oo(Zry/100,Tiz/100)03 (PLZT (x,y,z)) for optoelectronic applications.8, 9 In this paper, we present experimental results on the growth, structural and optical characterization of PLD-deposited ferroelectric films for in-line optical modulators. This application requires the use of low index (n2
Data Loading...
