Picosecond z-scan measurements of the two-photon absorption in beta-carotene solution over the 590-790 nm wavelength range
(2005) Organic Photonic Materials and Devices VII In Proceedings of SPIE - The International Society for Optical Engineering 5724. p.269-276- Abstract
The two-photon absorption (TPA) properties of β-carotene (beta-carotene) in chloroform solution were investigated over the 590-790 nm wavelength range. The TPA was characterized using the open-aperture z-scan technique with picosecond pulses provided by a widely traveling-wave optical parametric amplifier (OPA) pumped with a Ti:sapphire laser amplifier. We found the 0.2-1 cm/GW values of two photon absorption coefficient in the 725-790 nm wavelength region. At shorter wavelengths, a dramatic increase in the two-photon absorption around 600 nm was observed. The observed two photon absorption dependence on the excitation wavelength can be explained by the onset of strong excitation from the ground state 1Ag to the higher lying... (More)
The two-photon absorption (TPA) properties of β-carotene (beta-carotene) in chloroform solution were investigated over the 590-790 nm wavelength range. The TPA was characterized using the open-aperture z-scan technique with picosecond pulses provided by a widely traveling-wave optical parametric amplifier (OPA) pumped with a Ti:sapphire laser amplifier. We found the 0.2-1 cm/GW values of two photon absorption coefficient in the 725-790 nm wavelength region. At shorter wavelengths, a dramatic increase in the two-photon absorption around 600 nm was observed. The observed two photon absorption dependence on the excitation wavelength can be explained by the onset of strong excitation from the ground state 1Ag to the higher lying two-photon allowed m2Ag band centered around 310 nm (∼4eV).
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- author
- Major, A. ; Yoshino, F. ; Aitchison, J. S. ; Smith, P. W.E. ; Zigmantas, D. LU and Barzda, V.
- publishing date
- 2005-07-21
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- keywords
- Nonlinear spectroscopy, Optical nonlinearities in organic materials, Two-photon absorption
- host publication
- Organic photonics materials and Devices VII, SPIE
- series title
- Proceedings of SPIE - The International Society for Optical Engineering
- volume
- 5724
- pages
- 8 pages
- conference name
- Organic Photonic Materials and Devices VII
- conference location
- San Jose, CA, United States
- conference dates
- 2005-01-24 - 2005-01-26
- external identifiers
-
- scopus:21844446845
- ISSN
- 0277-786X
- DOI
- 10.1117/12.590669
- language
- English
- LU publication?
- no
- id
- 4f0f520b-8526-4031-985e-b318d665f936
- date added to LUP
- 2019-05-02 11:48:14
- date last changed
- 2022-03-25 17:48:05
@inproceedings{4f0f520b-8526-4031-985e-b318d665f936, abstract = {{<p>The two-photon absorption (TPA) properties of β-carotene (beta-carotene) in chloroform solution were investigated over the 590-790 nm wavelength range. The TPA was characterized using the open-aperture z-scan technique with picosecond pulses provided by a widely traveling-wave optical parametric amplifier (OPA) pumped with a Ti:sapphire laser amplifier. We found the 0.2-1 cm/GW values of two photon absorption coefficient in the 725-790 nm wavelength region. At shorter wavelengths, a dramatic increase in the two-photon absorption around 600 nm was observed. The observed two photon absorption dependence on the excitation wavelength can be explained by the onset of strong excitation from the ground state 1A<sub>g</sub> to the higher lying two-photon allowed m<sub>2</sub>A<sub>g</sub> band centered around 310 nm (∼4eV).</p>}}, author = {{Major, A. and Yoshino, F. and Aitchison, J. S. and Smith, P. W.E. and Zigmantas, D. and Barzda, V.}}, booktitle = {{Organic photonics materials and Devices VII, SPIE}}, issn = {{0277-786X}}, keywords = {{Nonlinear spectroscopy; Optical nonlinearities in organic materials; Two-photon absorption}}, language = {{eng}}, month = {{07}}, pages = {{269--276}}, series = {{Proceedings of SPIE - The International Society for Optical Engineering}}, title = {{Picosecond z-scan measurements of the two-photon absorption in beta-carotene solution over the 590-790 nm wavelength range}}, url = {{http://dx.doi.org/10.1117/12.590669}}, doi = {{10.1117/12.590669}}, volume = {{5724}}, year = {{2005}}, }