Net gain in small mode volume organic microcavities

作者：Tzschaschel C^*; Sudzius M; Mischok A; Froeb H; Leo K

来源：Applied Physics Letters, 2016, 108(2): 023304.

DOI：10.1063/1.4939872

We report a room temperature study of net gain far below the lasing threshold in planar organic microresonators with a limited amount of gain material. We measure the net gain change as a function of optical pump power for various resonator designs and cavity thicknesses by carefully analyzing spatially filtered emission spectra of the microcavity using a transfer-matrix approach. We show that the net gain increases with pump prior to saturation of the gain material and photo-bleaching of population inversion. The time-integrated peak gain value of DCM based gain medium is estimated to be at least 380 cm(-1) for our structures.

• 出版日期2016-1-11