LAUSR

Electron Energy Gain Spectroscopy (EEGS) and Stimulated Electron Energy Loss Spectroscopy (sEEGS) are powerful tools capable of yielding information on local excitations of nanostructured systems using a Transmission Electron Microscopes (TEM) equipped with optical illumination [1]. We report the application of an innovative in situ optical delivery system for the TEM [2]. The optical probe contains three independent optical channels that can deliver different discrete laser wavelengths or tunable broadband sources. Each optical channel can produce continuous wave (CW) or pulsed irradiance. The focused laser spot (< 10 mm diameter) is positioned with a computer-controlled nanomanipulator and can be configured for high vacuum and column bake. This non-contact laser irradiation system can also be used for simultaneous pinpoint sample heating with minimal thermo-mechanical drift and rapid temperature slew rates.