title: Focusing properties of vector vortex beams emitted by photonic-crystal lasers.
abstract: We experimentally investigate the focusing properties of first- and second-order vector beams and vector vortex beams generated by photonic-crystal lasers. When the azimuthal indices of the vector beam (l) and the phase dependence (n) match, strong intensity appears at the center of focus. Our theoretical analyses agree well with the experimental results and predict that the central intensity has circular polarization.
authors: Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan. kyoko@qoe.kuee.kyoto‑u.ac.jp
authors: Kyoko
authors: K
authors: Kitamura
authors: Kyosuke
authors: K
authors: Sakai
authors: Naoki
authors: N
authors: Takayama
authors: Masaya
authors: M
authors: Nishimoto
authors: Susumu
authors: S
authors: Noda