Polymers for nonlinear optics: Absorption, two-photon absorption and photodegradation

Robert A Norwood, D. R. Holcomb, F. F. So

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Chromophore-incorporated polymers have been optimized with regards to their nonlinearities and thermal stabilities, but little attention has been paid to other technologically important properties of these materials. Of these, linear and nonlinear absorption at used wavelengths are of paramount importance. Linear absorption can be measured with high sensitivity for thin film polymer samples using photothermal deflection spectroscopy, as we demonstrate for (poly)methylmethacrylate. The two-photon absorption coefficient at 1300 nm of two side-chain nonlinear optical polymers is obtained, and the results are compared according to the position of the two-photon energy with respect to the known chromophore excited states. Both linear absorption and two-photon absorption can lead to photochemistry, and we examine the possibility of two-photon induced photodegradation based on photobleaching kinetics data.

Original languageEnglish (US)
Pages (from-to)193-204
Number of pages12
JournalMolecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics
Volume6
Issue number2
StatePublished - 1993
Externally publishedYes

Fingerprint

Nonlinear optics
Photodegradation
nonlinear optics
Polymers
Photons
polymers
photons
Chromophores
chromophores
Methylmethacrylate
photothermal deflection spectroscopy
Photobleaching
Photochemical reactions
Excited states
photochemical reactions
absorptivity
Thermodynamic stability
thermal stability
nonlinearity
Spectroscopy

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Condensed Matter Physics

Cite this

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AU - So, F. F.

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AB - Chromophore-incorporated polymers have been optimized with regards to their nonlinearities and thermal stabilities, but little attention has been paid to other technologically important properties of these materials. Of these, linear and nonlinear absorption at used wavelengths are of paramount importance. Linear absorption can be measured with high sensitivity for thin film polymer samples using photothermal deflection spectroscopy, as we demonstrate for (poly)methylmethacrylate. The two-photon absorption coefficient at 1300 nm of two side-chain nonlinear optical polymers is obtained, and the results are compared according to the position of the two-photon energy with respect to the known chromophore excited states. Both linear absorption and two-photon absorption can lead to photochemistry, and we examine the possibility of two-photon induced photodegradation based on photobleaching kinetics data.

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