The present document relates to a method of detecting structures on or below the surface of a sample using a probe including a cantilever and a probe tip, the cantilever being characterized by one ore more normal modes of resonance including a fundamental resonance frequency, the method including: applying, using a transducer, a vibrational input signal to the sample; sensing, while the probe tip is in contact with the surface, an output signal indicative of motion of the probe tip due to vibrations at the surface induced by the vibrational input signal; wherein the vibrational input signal comprises at least a first signal component having a frequency within a range of 10 to 100 megahertz; and wherein the vibrational input signal is amplitude modulated using at least a second signal component having a modulation frequency below 5 megahertz. The present document further relates to a scanning probe microscopy method.