Abstract

Scanning-probe data storage is emerging as a viable alternative to conventional data storage, offering ultra-high density, low access times, and low power consumption. One probe-storage technique utilizes a thermomechanical means to store and retrieve information in thin polymer films. We describe the readback signal path and characterize the thermomechanical-based probe-storage recording channel. It is shown that this channel exhibits a particular nonlinear behavior at high storage densities or high recording power, that is, the energy per unit time used to write a bit of information. A simple model is proposed that accurately captures the characteristics of this nonlinearity. Experimental results from single-probe recording setups are used to verify the validity of this model and identify its relevant parameters.

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