Infrared absorption spectroscopy is a powerful analytical tool that enables the identification of molecular species. The sensitivity this technique, strongly limited by small cross-section vibration, can be greatly improved resonant interaction with nano-antennas via surface-enhanced infrared (SEIRA) mechanism. However, most examples SEIRA concern solid-state layers adsorbed on nano-antennas, w...

In the application of a micro-/nano-mechanical resonator, the position of an accreted particle and the resonant frequencies are measured by two different physical systems. Detecting the particle position sometimes can be extremely difficult or even impossible, especially when the particle is as small as an atom or a molecule. Using the resonant frequencies to determine the mass and position of ...

Multispectral metamaterial absorbers based on metal-insulator-metal nano-square patch resonators are studied here. For a geometry consisting of perfectly nano-square patches and vertical sidewalls, double resonances in the visible regime are observed due to simultaneous excitation of electric and magnetic plasmon modes. Although slightly modifying the sizes of the square patches makes the reson...