JIA Kai-ping,ZHANG Liang,FENG Lie-feng.Accurate dependences of spontaneous emission factor, lifetime, and photon lifetime on threshold current[J].Optoelectronics Letters,2020,16(2):103-107 Accurate dependences of spontaneous emission factor, lifetime, and photon lifetime on threshold current Author Name Affiliation JIA Kai-ping  Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Applied Physics, Tianjin University, Tianjin 300072, China  ZHANG Liang  Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Applied Physics, Tianjin University, Tianjin 300072, China  FENG Lie-feng  Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Applied Physics, Tianjin University, Tianjin 300072, China  Abstract:       Using the rate equation, several optical methods of characterizing the threshold of a laser diode (LD) were analyzed. The thresholdsdetermined by all methods are consistent if the spontaneous-emission-coefficient (β) is small. If β>0.05, the thresholds obtained by different methods are different. Especially, for micro-nano LDs with a large β, these methods are starting to become inaccurate. However, the d2S/dI2-I is a relatively accurate method to characterize threshold of these LDs compared to other methods. The effects of the spontaneous-emission-lifetime (τsp) and the photon-lifetime (τp) on thresholds were analyzed. The exact functions between the thresholdand the β, τsp and τp were obtained. Hits: 1311 Download times: 0 View Full Text    Download reader