Bibliographic Details
| Title: |
Reverse saturable absorption in chlorophyll A solutions. |
| Authors: |
Corrêa, D.S., De Boni, L., dos Santos Jr., D.S., Barbosa Neto, N.M., Oliveira Jr., O.N., Misoguti, L., Zilio, S.C., Mendonça, C.R. |
| Source: |
Applied Physics B: Lasers & Optics. 2002, Vol. 74 Issue 6, p559. 3p. |
| Subjects: |
Chlorophyll, Chloroform |
| Abstract: |
The dynamic nonlinear absorption of a chloroform solution of chlorophyll A was investigated using the Z-scan technique with picosecond pulses at 532 nm. The nonlinear absorption exhibits a reverse saturation, indicating a strong intersystem crossing (singlet–triplet) process. The time evolution of the optical nonlinearity, modeled by means of a five-level energy diagram, allows the determination of excited-state cross sections and the lifetime of the intersystem crossing based on its absorption characteristics and efficient formation of triplet states. Chlorophyll A was found to be a good candidate for a sensitizer in photodynamic therapy. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
