Chemistry of anomalous-dispersion phase-matched second harmonic generation

Conference · Sun Dec 31 23:00:00 EST 1989

OSTI ID:7073338

Cahill, P A ^[1]; Singer, K D ^[2]

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1. Sandia National Labs., Albuquerque, NM (USA)
2. AT and T Bell Labs., Princeton, NJ (USA)

The anomalous dispersion associated with a strong absorption in some carefully chosen asymmetric dyes permits efficient phase-matched SHG at a given frequency and concentration. One of these dyes was recently used to demonstrate the validity of the two-state model for {beta}, and leads to a method of enhancing second harmonic coefficients in poled polymer systems by 10{sup 1} to 10{sup 4}. The factor that primarily limits the utility of this process is the residual absorbance in a nearly transfer band. One figure of merit for comparing dyes for this application is the ratio between this minimum absorbance and {var epsilon}{sub max}; for many dyes this ratio is only 10{sup {minus}1} to 10{sup {minus}2}. Synthesis of new dyes has led to {var epsilon}{sub min}/{var epsilon}{sub max} ratios of 10{sup {minus}3} to 10{sup {minus}4}. 13 refs., 8 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7073338
• Report Number(s): SAND-89-2565C; CONF-900402--5; ON: DE90009281
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ABSORPTION SPECTRA
ANESTHETICS
AZINES
BARBITURATES
CENTRAL NERVOUS SYSTEM DEPRESSANTS
DISPERSIONS
DRUGS
DYES
FILMS
FREQUENCY MIXING
HARMONIC GENERATION
HETEROCYCLIC COMPOUNDS
HYPNOTICS AND SEDATIVES
MIXTURES
OPTICAL DISPERSION
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYMERS
PYRIMIDINES
SOLUTIONS
SPECTRA
SYNTHESIS
THIN FILMS