Particle Spectroscopy (IMAGE)

Optica

Particle Spectroscopy

Caption

Multiple species of micron-sized particles are simultaneously illuminated by an infrared laser and a green laser beam. Absorption of the infrared laser light by the particles increases their temperatures, causing them to expand and slightly altering their optical properties. These changes are unique to the material composition of each particle and can be measured by examining the modulation of scattered green light from each particle.

Credit

Ryan Sullenberger, MIT Lincoln Laboratory

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