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Polar self-assembled thin films for non-linear optical materials

Patent ·
OSTI ID:872893
 [1];  [1];  [1]
  1. Los Alamos, NM
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The design and synthesis of a family of calix[4]arene-based nonlinear optical (NLO) chromophores are discussed. The calixarene chromophores are macrocyclic compounds consisting of four simple D-.pi.-A units bridged by methylene groups. These molecules were synthesized such that four D-.pi.-A units of the calix[4]arene were aligned along the same direction with the calixarene in a cone conformation. These nonlinear optical super-chromophores were subsequently fabricated into covalently bound self-assembled monolayers on the surfaces of fused silica and silicon. Spectroscopic second harmonic generation (SHG) measurements were carried out to determine the absolute value of the dominant element of the second-order nonlinear susceptibility, d.sub.33, and the average molecular alignment, .PSI.. A value of d.sub.33 =60 pm/V at a fundamental wavelength of 890 nm, and .PSI..about.36.degree. was found with respect to the surface normal.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM
DOE Contract Number:
W-7405-ENG-36
Assignee:
Regents of University of California (Los Alamos, NM)
Patent Number(s):
US 6033773
OSTI ID:
872893
Country of Publication:
United States
Language:
English

References (4)

Ipso nitration of p-tert-butylcalix[4]arenes journal February 1992
Highly ordered films of neat calix[4]arenes for second order nonlinear optics journal December 1993
Chromophoric self-assembled multilayers. Organic superlattice approaches to thin-film nonlinear optical materials journal September 1990
New metal cation-selective ionophores derived from calixarenes: their syntheses and ion-binding properties journal January 1986

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