Publications by authors named "Yannick Folwill"
Recently developed alignment techniques for liquid crystals enable the definition of arbitrary alignment patterns. We present a method to determine these two-dimensional spatial alignment distributions as well as the retardation of thin nematic liquid crystal films. The method is based on quantifying the influence of the birefringence of such a film on light with known input polarization by measuring the Stokes parameters of light.
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- A millimeter-sized whispering-gallery resonator made from neodymium-doped lithium niobate can both lase and perform self-frequency doubling.
- A simple and inexpensive 808-nm laser diode is used to pump the neodymium ions, leading to laser output around 1.08 μm and producing green light through frequency doubling.
- This innovative technique is a first for combining lasing and frequency conversion in one high-Q resonator and could be applied to various materials and nonlinear optical processes.