Organic nonlinear optical materials
Encyclopedia
Organic materials are expected to have relatively strong nonlinear optical properties due to delocalized electrons at 
* orbitals. This expectation explains extensive search for better NLO materials among organic crystals.
distributed in biological substances. It forms a number of salts with organic and inorganic acids showing non-linear optical properties. L-Arginine maleate dihydrate (LAMD, C6H14N4O2,C4H4O4,2H2O) is one of these L-arginine salts which is a complex of strongly basic
amino acid, carboxylic acid and provides useful information
in relation to molecular interaction in present day biological
systems and to prebiotic self-organisms. It is also a nonlinear optical material with second harmonic generation efficiency 1.68 times that of KDP.
LAMD crystals are grown from solution by solvent evaporation; they belong to the triclinic space group P1.
family. Crystals are grown by slow evaporation of an aqueous solution containing L-methionine and maleic acid
, resulting in centimeter-large crystals of a non-centrosymmetric space group. They were applied for second harmonic generation
of an Nd:YAG laser (wavelength 1064 nm), and SHG efficiency equal to that of KDP has been obtained.
* orbitals. This expectation explains extensive search for better NLO materials among organic crystals.L-arginine maleate dihydrate (LAMD)
L-Arginine is one of the essential amino acids widelydistributed in biological substances. It forms a number of salts with organic and inorganic acids showing non-linear optical properties. L-Arginine maleate dihydrate (LAMD, C6H14N4O2,C4H4O4,2H2O) is one of these L-arginine salts which is a complex of strongly basic
amino acid, carboxylic acid and provides useful information
in relation to molecular interaction in present day biological
systems and to prebiotic self-organisms. It is also a nonlinear optical material with second harmonic generation efficiency 1.68 times that of KDP.
LAMD crystals are grown from solution by solvent evaporation; they belong to the triclinic space group P1.
L-methionine L-methioninium hydrogen maleate (LMMM)
LMMM too belongs to the amino acidAmino acid
Amino acids are molecules containing an amine group, a carboxylic acid group and a side-chain that varies between different amino acids. The key elements of an amino acid are carbon, hydrogen, oxygen, and nitrogen...
family. Crystals are grown by slow evaporation of an aqueous solution containing L-methionine and maleic acid
Maleic acid
Maleic acid is an organic compound that is a dicarboxylic acid, a molecule with two carboxyl groups. Maleic acid is the cis-isomer of butenedioic acid, whereas fumaric acid is the trans-isomer...
, resulting in centimeter-large crystals of a non-centrosymmetric space group. They were applied for second harmonic generation
Second harmonic generation
An optical frequency multiplier is a nonlinear optical device, in which photons interacting with a nonlinear material are effectively "combined" to form new photons with greater energy, and thus higher frequency...
of an Nd:YAG laser (wavelength 1064 nm), and SHG efficiency equal to that of KDP has been obtained.