Ultralow Lasing Threshold
Lasing performance is optimized by pressure-tuned exciton recombination dynamics, with threshold decreasing then increasing and reaching a lower value after pressure release.
Yao, Xiuru · Zhang, Zihan · Wei, Xinmiao · Xinmiao, Gai · Jinming, Zhu · Yu, Hongyu · Wang, Xin · Bao, Yongjun
Journal of Physical Chemistry Letters 2024
At low pressure, phonon hardening enhances barrier preventing exciton decay from free states to trapping states
At higher pressure, increased surface defect density due to anisotropic contraction along c-axis