High Energy Lab (pre 170905)

Lab contact: +81(0)98-966-1555
Location: Lab 2 A643
(Prep. Room A642)
 

Overview

With the inaguration of Lab2 at OIST, the High Energy Lab began development in July 2012. It is the second ultrafast laboratory of the Femtosecond Spectroscopy Unit. In this laboratory, we produce 5mJ femtosecond pulses with a 1kHz repitition rate from a Ti:Sapphire Regen amplifier system. The high output power allows for a variety of nonlinear processes and generation of light from 240nm to 20um as well as the THz. The research in this lab utilizes Two-color Pump-Probe Spectroscopy and Optical Pump THz Probe Spectroscopy in the study of two-dimensional materials, as well as the fast chemical release for applications in neuroscience. 

 

System Layout

System Description

Laser system
  • MaiTai ultrafast oscillator: 84MHz, >750mW, 780-820nm @ 70fs
  • Empower 45 pump laser: 28W output at 1kHz repetition rate, 200ns pulse duration, 527nm green source
  • Amplified TiSapphire system: 1kHz repetition rate, 5mJ pulse energy

  • TOPAS: a Pump TOPAS with 4mJ input and a Probe-TOPAS (1mJ input) and 240nm-20um tunability each

UV-NIR Pump/THz Probe Setup

A UV-visible-NIR pump/THz probe setup is currently under development. The 5mJ, 800nm output of the Regen is split into 4mJ and 1mJ, with the 4mJ portion directed into the Pump-TOPAS to generate the pump pulse. The 1mJ portion is used to generate  the THz probe using EO sampling with ZnTe <110> crystals.