Exciton dynamics : ultrafast exciton dynamics and two-photon pumped lasing from ZnSe nanowires

• Main Authors: Xing, Guichuan, Luo, Jingshan, Li, Hongxing, Wu, Bo, Liu, Xinfeng, Fan, Hong Jin, Sum, Tze Chien, Huan, Alfred Cheng Hon
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Science::Physics
• Online Access: https://hdl.handle.net/10356/102816; http://hdl.handle.net/10220/19196
• Institution: Nanyang Technological University

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...