Photon Statistics Of Single Photon Source At Room Temperature

This thesis is based on the confocal microscopy techniques and the principle of single photon source generated by pulse excitation of a three-level configuration molecular system. We focus on the following four topics:(1) Theoretical research on the record of every incident outputted from the single photon source, which responding by two SPCM using standard Hanbury-Brown-Twiss (HBT) technique. It is given out the property of statistics distribution of single pulse Mandel parameter Q(T). In addition, we analyze the intensity noise fluctuation by making a ON(?)OFF model.(2) Considered the effect from triplet state in single molecule energy level, an explicit function is given for the signal-to-backgound ratio to photon-counting statistics. When P_RS(1)>>2 (P_RS(2))^1/2 - 3P_RS(2), we present an efficient method to determine the SBR of triggered single photons source, which shows SBR = P_RS²(1)/2P_RS(2). The expression of Q, as the function of signal-to-backgound ratio, has been obtained.(3) We theoretically study the photon counting statistics character of the real single molecular photon source with a Poissonian statistics background and that of an ideal double molecular system based on the standard HBT detection. Mandel parameter 0 of each source with the same mean photon n was analyzed. We have obtained an efficient method to distinguish single molecule by the two-photon statistics probability P(2) , which shows P(2)<(2-(4-2n)^1/2)²/2. Additionally, we studied the effect of SBR of the single molecular photon source on the measured result.(4) The photon statistics measurement of a single photon source based on the HBT configuration with an imperfect detection system is studied. It is shown that the imperfect detectors, the imperfect beam-splitter and the unbalanced linear propagation efficiencies will reduce the single event Mandel Q parameter.