High sensitization efficiency and energy transfer routes for population inversion at low pump intensity in Er organic complexes for IR amplification

Abstract

J.X.H., H.Y., H.L. and Y.P.Z. were financially supported by the China Scholarship Council and Queen Mary University of London (QMUL). S.K. was supported by a Proof of Concept grant funded by QMUL and the EPSRC through the Silicon Photonics for Future Systems grant EP/L00044X. J.G. was financially supported by QMUL. I.H. acknowledges financial support from the EU FP7 (Marie Curie-CIG-Grant 303535). Y.Z. acknowledges financial support from the Major State Basic Research Development Program (2013CB922101) and NSFC (21371093). W.P.G. acknowledges financial support from EPSRC (EP/L020114/1 and EP/P007767/1) and from NSFC (61574095