Third-order nonlinear susceptibilities of several organic solvents are measured by third-harmonic generation at two laser wavelengths: 1.064 and 1.907 pm. The method used allows a determination of the modulus and phase by interference with the harmonic field generated in the liquid-cell windows. Air contribution to the resulting harmonic intensities is studied in detail. An experimental correction for this effect is proposed and verified for some solvents. Results are discussed within the bond-additivity model. tributions from consecutive nonlinear media (S or 3 in our case, depending whether or not we consider harmonic light from air) E (r, t) = g E~" (ri,t)T~, J where TJ are the corresponding whole transmission factors and the resulting harmonic light intensity 2 I "ce(3') J leads to complex interference patterns (cf. Sec. IV).

Magnetism in transition-metal-doped ZnO: A first-principles study J. Appl. Phys. 112, 023913 (2012) Fe3+ doping effects on the structure and multiferroicity of Fe1+xV2−xO4 (0≤x≤0.4) spinels J. Appl. Phys. 111, 124112 (2012) India-stabilized-gadolinia and gadolinia-stabilized-India: Their structural and magnetic properties Optical third harmonic generation measurements by transmission have been performed on thin films of polysilane deposited by a spinning technique with a thickness varying between 0.15 and 0.45 /-Lm. The films have a good optical. quality and support large laser power ( -200 MW /cm 2 at 1.064 /-Lm). They are transparent in visible and near infrared. The measured average value of cubic susceptibility (X~~x ( -3{t); (t),{t),{t)) is equal to (1.5 ± 0.1) X 10-12 esu at 1.064 /-Lm. The technique used for the third harmonic generation measurements allows determination of both modulus and phase of X OI . It is argued that the large value of i 3 ) is due to a three-photon resonance at 1.064 /-Lm.

The orientation of molecules in the monomolecular stearamide monolayers has been studied by infrared linear dichroism. By comparing the transmission absorption spectra carried out at different angles of incidence with the reflection absorption spectra obtained by depositing the monolayers on a metal substrate, the orientation of the dipole transition moments for a great number of normal vibration modes of the molecules may be determined to within a few degrees accuracy. Given certain assumptions, the orientation of the molecules themselves can then be deduced.

An original technique, with a special design of liquid cell, is proposed for third-harmonic generation in liquids. The technique is based on a principle of harmonic generation in an infinite medium by focused laser beam applied for liquid cell windows and uses a thin wedge-shaped liquid compartment. The measurements can be performed in air, and a high precision in cubic susceptibility and refractive index dispersion determination can be obtained. The technique also allows measurements to be made on liquids absorbing at harmonic and fundamental frequencies and in function of external parameters like temperature, pressure, and electric or magnetic fields. Some results for organic solvents are presented and compared with those obtained by other methods.

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