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. Author manuscript; available in PMC: 2014 Jan 14.
Published in final edited form as: Nat Photonics. 2013 Apr 28;7:449–453. doi: 10.1038/nphoton.2013.97

Figure 2. Diagram of the saturated transient absorption microscope.

Figure 2

OPO: optical parametric oscillator; AOM: acousto-optic modulator; BS: beam splitter; SLM: spatial light modulator; PD: photodiode; DM: dichroic mirror. Upper-right inset: the helix phase pattern sent to SLM to generate doughnut shape focus of the saturation beam. Lower-left inset: the measured point spread function of the saturation beam using second harmonic imaging of 20 nm ZnO nano-crystals. Scale bar: 500nm.