According to one embodiment of the present invention, identifying a
molecule of a sample includes illuminating the sample with a preparation
light beam, where the preparation light beam can initiate a substantially
maximized coherence of a target molecule to yield a molecular signature
corresponding to the target molecule. The sample is illuminated with a
probe light beam, where the probe light beam can scatter radiation from
the sample. Radiation scattered from the sample is detected, and whether
the radiation exhibits the molecular signature is determined. The target
molecule is identified in accordance with the determination of whether the
radiation exhibits the molecular signature.