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Semiconductor Physics, Quantum Electronics & Optoelectronics. 2016. V. 19, N 2. P. 162-168.
Van der Waals interaction between surface
and particle with giant polarizability
Abstract. We show that a nanoparticle with a “giant” polarizability (i.e., with the polarizability volume significantly exceeding the particle volume) placed in the vicinity of a surface experiences a strongly increased van der Waals force at distances comparable or smaller than the characteristic scale . At distances close R0, the oscillation mode of the particle dipole moment softens, so nonlinear polarizability must be taken into account to describe the particle-surface interaction. It is shown that a proper treatment of nonlinear effects results in the van der Waals force that is free of divergences and repulsive contributions. Keywords: van der Waals interaction, nonlinear polarizability, giant polarizability, hard mode, soft mode.
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