Jitter-calibrated second-order correlation measurement of low-repetition-rate pulsed excitation

TL;DR

This paper introduces a jitter-calibrated second-order correlation measurement technique for low-repetition-rate pulsed excitation, enabling accurate $g^2( au)$ characterization despite timing jitter, demonstrated with CdSe nanowire lasers.

Contribution

The method allows accurate $g^2( au)$ measurement under low repetition rates with significant timing jitter, which was previously challenging.

Findings

Successfully restored $g^2( au)$ curves with jitter calibration

Demonstrated $g^2(0)$ evolution during laser emission transition

Applicable to low-repetition-rate pulsed excitation scenarios

Abstract

We report a new technique for the realization of second-order correlation ($g^2(\tau)$) measurement under low-repetition-rate pulsed excitation (1 kHz), with timing jitter calibrated to restore lateral $g^2(\tau)$ curves and determine $g^2(0)$. We use CdSe nanowire (NW) laser to demonstrate the jitter-calibrated $g^2(\tau)$ measurement, where $g^2(0)$ evolution shows the laser emission transition process. The exciting pulses are split into reference and excitation channels, which enables the jitter calibration when the exciting pulses have significant timing jitter and low repetition rate. After using the reference signals to calibrate and rearrange the single-photon signals, lateral $g^2(\tau)$ curves can be entirely restored, and $g^2(0)$ evolution is demonstrated from our method.