Abstract
Several independent groups have observed optical cooling by means of anti-Stokes luminescence in condensed media. The most promising materials are grouped into two categories: ion-doped glasses and organic dye solutions. It is this latter group that we focus our efforts on. Recent studies by our group show that irradiating a solution of rhodamine 101 in the long wavelength wing of the absorption spectrum results in the observation of optical cooling. To improve upon the initial observation of a few degree drop in temperature requires a better understanding of the conditions and phenomena leading to anti-Stokes luminescence in dye solutions. We develop a thermal lensing experiment to obtain fluorescence quantum yields of various dye solutions. The importance of concentration, choice of solvent, deuteration, and acidification are discussed.
Original language | English |
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Pages (from-to) | G171-G176 |
Journal | Materials Research Society Symposium - Proceedings |
Volume | 667 |
DOIs | |
Publication status | Published - Jan 1 2001 |
Externally published | Yes |
Event | Luminescent and Lumiescent Materials - San Francisco, CA, United States Duration: Apr 17 2001 → Apr 19 2001 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering