PUMP PROBE MEASURING DEVICE

摘要

A pump probe measuring device (1) comprises: an ultrashort optical pulse laser generator (2) for generating a first ultrashort optical pulse train which is a pump light (3a), second and third ultrashort optical pulse trains (3b), (3c) which are probe lights; an optical shutter unit (6) to which the second and the third ultrashort pulse trains (3b), (3c) are introduced; and a detecting unit (20) including an irradiation optical system (8) for directing the pump light (3a), the first probe light (3b) and the second probe light (3c) to a sample (7), a sensor (11) for detecting a probe signal from the sample (7), and a phase-sensitive detecting means (12) connected to the sensor (11). An optical shutter control unit (10) periodically modulates the delay time of the first probe light (3b) and that of the second probe light (3c) with respect to the pump light (3a), and the modulated first and second probe lights (3a), (3b) illuminate the sample (7) alternately to detect the probe signals from the sample (7) by the phase-sensitive detecting means (12) in synchronization with the periodic modulation signal of the delay time.

主权项

1. A pump probe measuring device, comprising:
an ultrashort optical pulse laser generator for generating a first ultrashort optical pulse train which is a pump light, a second ultrashort optical pulse train which has a first delay time with respect to the pump light and is a first probe light, and a third ultrashort optical pulse train which has a second delay time with respect to the pump light and is a second probe light; an optical shutter unit to which the second and the third ultrashort optical pulse trains are introduced; an optical shutter control unit for controlling the optical shutter unit; and a detecting unit including an irradiation optical system for irradiating a sample with the pump light and the first and the second probe lights, a sensor for detecting probe signals from the sample, and a phase-sensitive detecting means connected to the sensor, wherein the delay time of the first probe light and that of the second probe light with respect to the pump light are modulated periodically by the optical shutter control unit; the modulated first and second probe lights illuminate the sample alternately; and the probe signals from the sample are detected by the phase-sensitive detecting means in synchronization with the periodic modulation of the delay time.