Corbitt, T.Chen, Y.Innerhofer, E.Muller-Ebhardt, H.Ottaway, D.Rehbein, H.Sigg, D.Whitcomb, S.Wipf, C.Mavalvala, N.2008-11-142008-11-142007Physical Review Letters, 2007; 98(15):150802-1-150802-40031-90071079-7114http://hdl.handle.net/2440/48383We report on a stable optical trap suitable for a macroscopic mirror, wherein the dynamics of the mirror are fully dominated by radiation pressure. The technique employs two frequency-offset laser fields to simultaneously create a stiff optical restoring force and a viscous optical damping force. We show how these forces may be used to optically trap a free mass without introducing thermal noise, and we demonstrate the technique experimentally with a 1 g mirror. The observed optical spring has an inferred Young's modulus of 1.2 TPa, 20% stiffer than diamond. The trap is intrinsically cold and reaches an effective temperature of 0.8 K, limited by technical noise in our apparatus.en©2007 American Physical SocietyJournal article002008303310.1103/PhysRevLett.98.1508020002456914000122-s2.0-3424714420641729Ottaway, D. [0000-0001-6794-1591]