Premium
Exciton Dynamics: Ultrafast Exciton Dynamics and Two‐Photon Pumped Lasing from ZnSe Nanowires (Advanced Optical Materials 4/2013)
Author(s) -
Xing Guichuan,
Luo Jingshan,
Li Hongxing,
Wu Bo,
Liu Xinfeng,
Huan Cheng Hon Alfred,
Fan Hong Jin,
Sum Tze Chien
Publication year - 2013
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201370024
Subject(s) - lasing threshold , femtosecond , materials science , exciton , nanowire , excitation , ultrashort pulse , photon , optoelectronics , laser , optical pumping , biexciton , molecular physics , optics , photoluminescence , condensed matter physics , physics , quantum mechanics , wavelength
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.