Dynamic control of polarization states with barium titanate integrated photonic devices
Abstract
We demonstrate continuous control of polarization from a two-dimensional grating outcoupler of a modified Mach–Zehnder interferometer, fabricated in barium titanate grown on a silicon substrate. The polarization state of out-coupled light at λ≈1550 nm is measured as a function of wavelength and applied bias. We show wavelength-dependent polarization switching from nearly entirely left hand circularly, to linearly, to nearly entirely right hand circularly polarized light. We also demonstrate voltage-tuning of the polarization state of the out-coupled light and achieve switching between left- and right-hand circularly polarized output with <10 V applied bias and an effective VπL∼0.6Vcm. The demonstrated device offers the potential for compact sources with deterministic and ultra-high speed control of polarization states.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (8)
D. Krueger
The Chandra Family Department of Electrical and Computer Engineering, University of Texas at Austin 1 , Austin, Texas 78758,
L. Tian
The Chandra Family Department of Electrical and Computer Engineering, University of Texas at Austin 1 , Austin, Texas 78758,
D. Hungund
The Chandra Family Department of Electrical and Computer Engineering, University of Texas at Austin 1 , Austin, Texas 78758,
H. G. Kim
The Chandra Family Department of Electrical and Computer Engineering, University of Texas at Austin 1 , Austin, Texas 78758,
A. Raju
The Chandra Family Department of Electrical and Computer Engineering, University of Texas at Austin 1 , Austin, Texas 78758,
A. Posadas
La Luce Cristallina Inc. 2 , Austin, Texas 78759,
A. A. Demkov
Department of Physics, University of Texas at Austin 3 , Austin, Texas 78712,
D. Wasserman