Ultra-compact and low-threshold thulium microcavity laser monolithically integrated on silicon Su, Zhan ; Li, Nanxi ; Salih Magden, E. ; Byrd, Matthew ; Purnawirman ; Adam, Thomas N. ; Leake, Gerald ; Coolbaugh, Douglas ; Bradley, Jonathan D. B. ; Watts, Michael R. Abstract Publication: Optics Letters Pub Date: December 2016 DOI: 10.1364/OL.41.005708 Bibcode: 2016OptL...41.5708S