Study of diacetylene monomer and polymer monolayers using second- and third-harmonic generation

Journal Article · Mon Feb 29 23:00:00 EST 1988 · J. Opt. Soc. Am. B: Opt. Phys.; (United States)

DOI:https://doi.org/10.1364/JOSAB.5.000668· OSTI ID:5331168

Berkovic, G; Superfine, R; Guyot-Sionnest, P; Shen, Y R; Prasad, P N

Monolayers of several diacetylene monomers and polymers spread at the air-water interface have been studied using optical second-harmonic generation (SHG) and third-harmonic generation (THG). Owing to the centrosymmetry of the diacetylene core, SHG from these molecules arises mainly from their side groups. THG from a single monolayer of polydiacetylene is reported, to our knowledge, for the first time: the THG signal (in reflection) arising from the polydiacetylene monolayer is several times larger than that from the water subphase. THG was observed both when a polymer monolayer was spread directly and when a monomer monolayer was UV polymerized on the water surface. Values of the third-order nonlinearity of polydiacetylenes derived from these measurements are in agreement with earlier studies.

• Research Organization: Department of Physics, University of California Center for Advanced Materials, Lawrence Berkeley Laboratory, Berkeley, California 94720
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5331168
• Journal Information: J. Opt. Soc. Am. B: Opt. Phys.; (United States), Journal Name: J. Opt. Soc. Am. B: Opt. Phys.; (United States) Vol. 5:3; ISSN JOBPD
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AIR
FILMS
FLUIDS
FREQUENCY MIXING
GASES
HARMONIC GENERATION
HYDROCARBONS
HYDROGEN COMPOUNDS
INTERFACES
MONOMERS
NONLINEAR OPTICS
OPTICAL PROPERTIES
OPTICS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYACETYLENES
POLYENES
POLYMERS
THIN FILMS
WATER