Tight focusing of laser beams in a λ/2-microcavity Khoptyar, Dmitry ; Gutbrod, Raphael ; Chizhik, Anna ; Enderlein, Jörg ; Schleifenbaum, Frank ; Steiner, Mathias ; Meixner, Alfred J. Abstract Publication: Optics Express Pub Date: June 2008 DOI: 10.1364/OE.16.009907 Bibcode: 2008OExpr..16.9907K