Contribution and detection of higher eigenmodes during dynamic atomic force microscopy

We have demonstrated that the conventional approach of discerning higher mode participation via amplitude and phase demodulation is not suitable for high bandwidth applications. Furthermore, we have developed a method where the higher mode participation is reconstructed with high fidelity, and presented a scheme for high bandwidth detection of higher modes when their participation becomes significant. These methods are shown to outperform the traditional amplitude-phase demodulation schemes in terms of speed, resolution, and fidelity. The framework developed is tested on simulations and the method's utility for first two modes is demonstrated experimentally. The results have appeared in Applied Physics Letters.

We have demonstrated that the conventional approach of discerning higher mode participation via amplitude and phase demodulation is not suitable for high bandwidth applications. Furthermore, we have developed a method where the higher mode participation is reconstructed with high fidelity, and presented a scheme for high bandwidth detection of higher modes when their participation becomes significant. These methods are shown to outperform the traditional amplitude-phase demodulation schemes in terms of speed, resolution, and fidelity. The framework developed is tested on simulations and the method’s utility for first two modes is demonstrated experimentally. The results have appeared in Applied Physics Letters.