Studies of buried interfaces by optical second-harmonic generation

Observation of local-interfacial optical phonons at buried interfaces using time-resolved second-harmonic generation

We have used an all-optical technique to observe optical phonons localized at a buried interface. The technique is based on coherent excitation of the interfacial vibrational mode by femtosecond laser irradiation and detection of the free-induction decay of the coherent oscillation by time-resolved second-harmonic generation. For native oxide-covered GaAs ~100!, we observe a single-optical phon...

Temperature dependence of magnetization-induced second harmonic generation at buried exchange-biased interfaces

Polarity of Liquid Interfaces by Second Harmonic Generation Spectroscopy

A spectroscopic method, based on the interface selectivity of second-harmonic generation, is used to obtain the polarity of liquid interfaces. In this paper the second-harmonic measurement of the spectrum of the polarity indicator molecule N,N′-diethyl-p-nitroaniline (DEPNA) at the air/water interface demonstrates the method. Two different approaches are used to measure the intramolecular charg...

Optical second harmonic generation properties of BiB3O6.

We present studies of the optical properties of the new nonlinear material BiB3O6 for second harmonic generation from the visible to infrared. We have determined the phase-matching conditions and effective nonlinear coefficients in the three principal optical planes, acceptance bandwidths, spatial and temporal walkoff, group velocity dispersion and double phase-matching behaviour. We also repor...

Optical second harmonic generation chiral spectroscopy.

Chiral spectroscopic study: The intensities of second harmonic generation chiral spectroscopy are obtained from the dispersion of the nonlinear optical susceptibility components, as a function of wavelength for helicenbisquinone thin films (see figure). A single formalism fits all the data simultaneously, and the findings constitute an important milestone towards the development of a new experi...