Abstract
Surface deformation is a common phenomenon in many situations, and can be caused by stress, temperature variation, environmental variation, etc. With the developing of nanotechnology, biological and chemical properties of nano materials are generally in association with its surface condition. High-sensitivity methods of sensing super tiny surface deformations become necessary. In this work, a high sensitive surface deformation sensor is proposed by one-dimensional photonic crystal. Results show that Tamm plasmon polaritons are generated in this configuration and the reflection spectrum is dramatically influenced by the surface deformation of the silver and gold films. The variation rate of reflection light intensity reaches 20% when the surface deformation of is 1 nm. And the variation rate reaches 13% per nanometer for gold surfaces. Since the detecting precision of light intensity is greatly high, the theoretical precision of this device can reach picometer magnitude. Meanwhile, this configuration also can realize mapping surface deformation distribution through scanning method. The simulation results reveal the proposed configuration can distinguish 1 nm surface deformation of silver surfaces.
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