Measurement of nonlinear refractive index of organic materials by z-scan

The nonlinear effects characterization by using the Z-Scan transmission technique in many materials has generated great in forest according to the technological necessities. The majority part of the nonlinear effects can be described by the classic electromagnetic theory, with the electrical suscept...

Full description

Autores:
Fontalvo, M.
García, Aday
Valbuena Duarte, Sonia
Racedo, Fran
Tipo de recurso:
Article of journal
Fecha de publicación:
2016
Institución:
Corporación Universidad de la Costa
Repositorio:
REDICUC - Repositorio CUC
Idioma:
eng
OAI Identifier:
oai:repositorio.cuc.edu.co:11323/977
Acceso en línea:
https://hdl.handle.net/11323/977
https://repositorio.cuc.edu.co/
Palabra clave:
Aromatic compounds
Characterization
Electric fields
Electromagnetic field effects
Electromagnetic field theory
Laser excitation
Laser theory
Nanoscience
Nanotechnology
Neodymium lasers
Nonlinear equations
Nonlinear opticsOrganic lasers
Rights
openAccess
License
Atribución – No comercial – Compartir igual
Description
Summary:The nonlinear effects characterization by using the Z-Scan transmission technique in many materials has generated great in forest according to the technological necessities. The majority part of the nonlinear effects can be described by the classic electromagnetic theory, with the electrical susceptibility in the constitutive equation that relates the electrical polarization with the electrical field. In this work the sign and refractive index magnitude and the nonlinear absorption coefficient of the following organic substance were determined: methylene-blue, rodamine LD, vegetable powder and gentian violet a hundred percent pure dissolved in isopropyl alcohol, a laser Nd: YAG was used as a source excitation. The bunch of laser was focused with a lens of ten centimeters of focal length; by using a displacement system the sweeping of twenty centimeters was realized. The following results of the normalized curves of the transmittance in function of the z position were obtained applying the Sheik- Bahae theory: The nonlinear refractive index of the dye shows an increase in function of its concentration and the power of exciting of the laser with negative nonlinear sign in the majority of the sample.