期刊
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
卷 19, 期 4, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2013.2259222
关键词
Correlation functions; laser threshold; nanolasers; spontaneous emission factor
资金
- Defense Advanced Research Program Agency (DARPA) [W911NF-07-1-0314]
- Air Force Office of Scientific Research (AFOSR) [FA9550-10-01-0444]
- ARO [W911NF-08-1-0471]
The question of what is a laser is closely related to that of what is laser threshold. We analyze possible definitions of laser threshold through the L-I curve and conclude that there is no consistent definition of a threshold when the spontaneous emission factor is large, as in the case of micro- and nano-lasers. All these definitions based on L-I curve are not consistent with the evolution of statistical properties of light output with pumping. Thus, we argue that the threshold definition based on L-I curve has to be abandoned for nanolasers, where the fraction of spontaneous emission into a lasing mode becomes quite large.
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