Exciton dynamics : ultrafast exciton dynamics and two-photon pumped lasing from ZnSe nanowires
Huan, Alfred Cheng Hon
Fan, Hong Jin
Sum, Tze Chien
Date of Issue2013
School of Physical and Mathematical Sciences
Energy Research Institute
The commonly accepted paradigm that the higher pump intensities needed for two photon excitation (TPE) correspond to a higher exciton density threshold for two-photon pumped lasing (nth) is re-examined by T.-C. Sum and co-workers using femtosecond time-resolved spectroscopy. The results on page 319 show that a much lower nth is needed to achieve lasing in single ZnSe nanowires with TPE compared to single photon excitation (SPE). This finding has significant implications for the photostability and durability of nanowire lasing.
Advanced optical materials
© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.