The oscillatory response of nonlinear systems exhibits characteristic phenomena such as multistability [1], discontinuous jumps [2, 3] and hysteresis [3]. These can be utilized in applications leading, e.g., to precise frequency measurement [4], mixing [5], memory elements [6, 7], reduced noise characteristics in an oscillator [8] or signal amplification [9, 10, 11, 12]. Approaching the quantum...

The problem of finding the optimal current distribution supported by small radiators yielding minimum quality (Q) factor is a fundamental in electromagnetism. Q bounds constrain maximum operational bandwidth devices including antennas, metamaterials, and nanoresonators, have been featured seminal papers past decades. Here, we determine lower factors small-size plasmonic high-permittivity dielec...

Intrinsic ripples in freestanding graphene have been exceedingly difficult to study. Individual ripple geometry was recently imaged using scanning tunnelling microscopy, but these measurements are limited to static configurations. Thermally-activated flexural phonon modes should generate dynamic changes in curvature. Here we show how to track the vertical movement of a one-square-angstrom regio...

We show that nano-mechanical interaction using atomic force microscopy (AFM) can be used to map out mode-patterns of an optical micro-resonator with high spatial accuracy. Furthermore we demonstrate how the Q-factor and center wavelength of such resonances can be sensitively modified by both horizontal and vertical displacement of an AFM tip consisting of either Si(3)N(4) or Si material. With a...

Slot-waveguides allow light to be guided and strongly confined inside a nanometer-scale region of low refractive index. Thus stronger light-analyte interaction can be obtained as compared to that achievable by a conventional waveguide, in which the propagating beam is confined to the high-refractive-index core of the waveguide. In addition, slot-waveguides can be fabricated by employing CMOS co...

We developed a highly sensitive humidity sensor based on the combination of ultrahigh-frequency film bulk acoustic resonator (FBAR) and nano-assembled polyelectrolyte (PET) thin films. The water molecule absorption efficiency was optimized by forming loosely-packed PET nanostructures. Then, the humidity sensing characteristics were analyzed in terms of sensitivity, linearity, reversibility, sta...

This paper studies the nonlinear behavior of a nano-optomechanical actuator, consisting of a free-standing arc in a ring resonator that is coupled to a bus waveguide through evanescent waves. The arc deflects when a control light of a fixed wavelength and optical power is pumped into the bus waveguide, while the amount of deflection is monitored by measuring the transmission spectrum of a broad...

Trapping broadband electromagnetic radiation over a subwavelength grating, provides new opportunities for hyperspectral light-matter interaction on a nanometer scale. Previous efforts have shown rainbow-trapping is possible on functionally graded structures. Here, we propose groove width as a new gradient parameter for designing rainbow-trapping gratings and define the range of its validity. We...

A novel approach for RF fingerprinting using a simple microwave passive device is proposed. This device is a multi-port cavity resonator filled with a dielectric material mixed with randomly-distributed microor nano-particles. Such structure generates a typical Physical Unclonable Function (PUF) that can be perfectly used for storing and protecting secure information. This mixture guarantees a ...