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Light-induced detuning of a quartz crystal wafer with temperature-compensated cut

This paper reports the light-induced detuning effect of a quartz crystal wafer with a temperature-compensated cut. Upon incidence of light on its front electrode, the crystal wafer displays a reversible increase in the resonant frequency. The amplitude of this frequency increase is found to be light wavelength dependent and proportional to the light intensity. A larger frequency increase will be visible if the electrode is coated with materials of higher absorbance or is in contact to media of lower thermal conductivity, which points to a thermal nature of the effect. If a p-polarized laser beam is incident on the quartz crystal wafer bearing a gold grating electrode, the photon energy can possibly be coupled into the electrode via the resonant excitation of a surface plasmon mode. There, a strict correlation is found between the amplitude of the detuned resonant frequency and the intensity loss in the surface plasmon resonance reflectivity signals. This correlation allows for the integration of a surface...