The development of dye lasers has not progressed much in the last couple of decades. There are some prospects for new borane based dyes, but the significant impact of triplet absorption prevents all these lasers from dominating visible wavelength sources. Oxygen and COT are among the compounds that speed triplet quenching, but they are at best, modestly effective.
I was thinking about NMR and the interaction of high frequency radio waves and hydrogen and carbon. These nuclei possess spin and can be identified based on the local electrical environment and its effect on their resonance frequencies. If they can be influenced then maybe the local electrical environment can be influenced in turn by a radio frequency input and/or a strong magnetic field.
A microwave oven heats water, but not hydrocarbons like plastic. The molecular bonds in water are stretched and compressed when they absorb microwaves of the correct frequency.
Could a scanning, broad-band microwave transmitter be tuned so as to interact with excited dye molecules and preferentially stimulate the relaxation of the triplet state to the ground state?
I have no idea if this is a reasonable question. Is there any existing research where radio waves are being used to modify chemical states or reactions?