| Title | Photoluminescence and optical studies of photodegradation in nonlinear optical organic chromophores |
| Publication Type | Conference Paper |
| Year of Publication | 2009 |
| Authors | Raymond, S.G., Williams G.V.M., Do M.T.T., Janssens S., Lochocki B., Bhuiyan M.D.H., and Kay A.J. |
| Conference Name | Proceedings of SPIE - The International Society for Optical Engineering |
| Date Published | 2009 |
| Keywords | Amorphous films, Amorphous polycarbonates, Average numbers, Chromophores, Figure of merit, Host-guests, Light, Low oxygen partial pressure, Nonlinear optical, Nonlinear optics, Optical materials, Optical study, Organic chromophores, Oxygen, Oxygen partial pressure, Partial pressure, photodegradation, Photodegradation rate, Photoluminescence, Photoluminescence intensities, Photons, Photostability, Ultraviolet irradiations, Zwitterionic |
| Abstract | Photostability measurements have been made on host-guest films containing amorphous polycarbonate and an organic chromophore with a high 2nd order nonlinear optical figure of merit. We find that the rate of photodegradation strongly depends on the oxygen partial pressure. At very low oxygen partial pressures (1.4×10-5 bar) the average number of photons required to photodegrade a chromophore is as high as 1×10 9 at 655 nm. Encapsulation leads to an initial rapid decrease in the photodegradation rate due to the trapped oxygen and a gradual photodegradation where 2×109 photons are required to photodegrade a chromophore. There is an anomalous increase and then decrease in the photoluminescence intensity during ultraviolet irradiation. © 2009 SPIE. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-69949136087&partnerID=40&md5=622e4e17aa9d66fb55eddef2ca729a3f |
| DOI | 10.1117/12.820835 |
