2021-09-14|Sunatori's Photoluminescence (Destructive Fluorescence by Laser in Quinine)
Potential Discovery or Invention
Fluorescence is photoluminescence as a result of singlet-singlet electronic relaxation by absorption of photons (typical lifetime: nanoseconds).
Tonic water is carbonated soft drink in which quinine is dissolved. Quinine in tonic water will fluoresce under ultraviolet light.
Laser beam from a Focusable 200-250mW 650nm Laser Module Red Dot Laser Generator Diode does not show any photoluminescence in tonic water. Laser beam from a 1000mW Bluish Violet Laser Head Parts 405nm For Engraver DIY Engraving Machine shows phosphorescence in tonic water.
However, slight change in the direction of laser beams results in drastic reduction of fluorescence by the VIOLET laser beam as if there were destructive interference with the RED laser beam.
