Second harmonic generation study of quantum well states in thin noble metal overlayer films

Abstract

The nonlinear optical response o f a noble metal overlayer on lop o f a magnetic film shows an oscillatory behaviour dom inating the total .second harmonic output. The oscillation periods are twice as large as those observed with linear Kerr effect measurements. Spectroscopic studies show that the oscillatory part of the signals comes from the intraband transitions in the overlayer metal.

Nonlinear magneto-optical probing of magnetic interfaces

“…The first indications of a QWS-response in MSHG was reported in a study of the Cu/Co/Cu system [17]. A much better demonstration of the appearance of quantum well oscillations in the MSHG response was given for the Au/Co/Au system [10,23] (see Fig. 3).…”

Nonlinear Magnetooptics for Magnetic Thin Films

“…For example, a recently developed fs parametric oscillator using a KTP crystal, extends the tunability range of a Ti:sapphire laser to above 2)lm [88]. Preliminary spectroscopic studies on the same Au/Co system indicate that the oscillatory part of the signals originates from the intraband transitions in Au [93].…”