Modulation of two-photon absorption, two-photon fluorescence (TPF), as well as single-photon fluorescence (SPF), is shown through incident laser polarization for different fluorescent dyes. TPF intensity increases as the polarization changes from circular to linear irrespective of the dye, though the intensity and wavelength dependent studies of two-photon polarization ratio for any particular dye (e.g., Rhodamine 6G) reveal the nature of their excited state. SPF intensity of IR125 and IR144 dyes increases as the polarization changes from linear to circular. Thus, polarization studies indicate that in case of TPF, there is a preference toward the linear component while in case of SPF, the preference is toward the circular component of the incident laser beam.
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21 April 2010
Research Article|
April 21 2010
Polarization induced control of single and two-photon fluorescence Available to Purchase
Amit Nag;
Amit Nag
Department of Chemistry,
Indian Institute of Technology
, Kanpur, Uttar Pradesh 208016, India
Search for other works by this author on:
Debabrata Goswami
Debabrata Goswami
a)
Department of Chemistry,
Indian Institute of Technology
, Kanpur, Uttar Pradesh 208016, India
Search for other works by this author on:
Amit Nag
Debabrata Goswami
a)
Department of Chemistry,
Indian Institute of Technology
, Kanpur, Uttar Pradesh 208016, India
a)
Electronic mail: [email protected].
J. Chem. Phys. 132, 154508 (2010)
Article history
Received:
September 01 2009
Accepted:
March 22 2010
Citation
Amit Nag, Debabrata Goswami; Polarization induced control of single and two-photon fluorescence. J. Chem. Phys. 21 April 2010; 132 (15): 154508. https://doi.org/10.1063/1.3386574
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