부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.optmat.2005.11.034 Byline: Stefano Bigotta (a), Daniela Parisi (a), Lucia Bonelli (a), Alessandra Toncelli (a), Alberto Di Lieto (b), Mauro Tonelli (a) Keywords: Laser cooling; Anti-Stokes; Rare earth compounds; Barium yttrium fluoride Abstract: We observed laser cooling in a 2.5% Yb.sup.3+-doped BaY.sub.2F.sub.8 single crystal. Single crystals have been grown by the Czochralski technique. The absorption spectra and the visible emission properties have been measured at room temperature. A temperature drop of almost 4K was obtained by pumping the crystal with 3W of laser radiation at 1025nm in single pass configuration. Author Affiliation: (a) INFN - Sez. di Pisa and Dipartimento di Fisica, Universita di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy (b) Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy Article History: Received 3 October 2005; Revised 4 November 2005; Accepted 24 November 2005