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NLO of Conjugated Polymers: Progress in Science and Prospects for Technology
Abstract In this chapter we highlight two studies carried out at Bellcore in an effort to better understand the nonlinear optical (NLO) properties of conjugated polymers, and to establish an existence proof of an organic-based all-optical switching device. The first is the spectrum of χ(3) in polyactylene. Using an infrared free electron laser (FEL) we have measured the spectrum of χ(3) to energies below ~Eg/4. We have identified both two- and the three-photon resonance enhancements of χ(3), and have discussed their implications on the role of Coulomb correlations in this simplest of all conjugated polymers. The second is characterization of a polydiacetylene-based directional coupler that can be used as a all-optical switching device. Nonlinear optical transmission and switching phenomena are observed in this prototype device. At λ = 1.06 µm, we find the transmission losses are dominated by an adverse two-photon absorption process. Such adverse effects can be eliminated by decreasing the photon energies to hνg/2.
NLO of Conjugated Polymers: Progress in Science and Prospects for Technology
Abstract In this chapter we highlight two studies carried out at Bellcore in an effort to better understand the nonlinear optical (NLO) properties of conjugated polymers, and to establish an existence proof of an organic-based all-optical switching device. The first is the spectrum of χ(3) in polyactylene. Using an infrared free electron laser (FEL) we have measured the spectrum of χ(3) to energies below ~Eg/4. We have identified both two- and the three-photon resonance enhancements of χ(3), and have discussed their implications on the role of Coulomb correlations in this simplest of all conjugated polymers. The second is characterization of a polydiacetylene-based directional coupler that can be used as a all-optical switching device. Nonlinear optical transmission and switching phenomena are observed in this prototype device. At λ = 1.06 µm, we find the transmission losses are dominated by an adverse two-photon absorption process. Such adverse effects can be eliminated by decreasing the photon energies to hνg/2.
NLO of Conjugated Polymers: Progress in Science and Prospects for Technology
Etemad, S. (author) / Fann, W-S. (author) / Townsend, P. D. (author) / Baker, G. L. (author) / Jackel, J. (author)
1990-01-01
12 pages
Article/Chapter (Book)
Electronic Resource
English
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