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Witec α-SNOM

This instrument is capable of operating in three modes:
  1. Confocal - 650 nm & white light(see below) excitation; .40,.60,.80,1.25 NA objectives; must supply own collection filters.
  2. SNOM - 650nm & white light(see below)excitation; ~100nm aperture; must supply own collection filters
  3. AFM - Contact mode, pulsed force mode; conducting AFM capabilities

The Witec microscope can use a supercontinuum generating white light source with a spectrum of 400nm to 3um. The collimated broadband output can be coupled directly into a (single mode) fiber or spectrally filtered by passing it through a monochromator and then coupled into a fiber. The setup also allows free-space angle and polarization resolved focused excitation of samples. The polarization of the free-space laser can be precisely set using a half-lambda wave plate. Finally, as a result of the pulsed output of the laser it is possible to use the source for lifetime measurements as well.

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