1. A microscope for generating a multi-dimensional, spectrally resolved image of a sample, the microscope comprising: a light source for generating a pulsed light; an optical scanner receiving the pulsed light and transmitting the pulsed light to focal points of the sample to be imaged, and causing a molecule at each focal point to absorb two infrared photons and emit energy; a dispersive element that receives the emitted energy from a single scan of the sample, disperses the energy into its spectral elements and transmits the spectrally dispersed energy; and a camera that generates the multi-dimensional, spectrally resolved image of the sample based on the spectrally dispersed energy from the dispersive element using only the emitted energy from the single scan of the sample.