Small perturbations in the dielectric environment around a high quality whispering gallery mode resonator usually lead to frequency shift of modes directly proportional polarizability perturbation. Here, we report experimental observations strong shifts that can be opposite and even exceed contribution perturbations' polarizability. The frequencies lithium niobate are shifted using substrates r...

Vaporization of low-boiling point droplets has numerous applications in combustion, process engineering, and recent years, clinical medicine. However, the physical mechanisms governing phase conversion are only partly explained. Here, we show that an acoustic resonance can arise from large speed sound mismatch between a perfluorocarbon microdroplet its surroundings. The fundamental mode obeys u...

We have developed a new ultra-low field frequency-swept (FS) electrically detected magnetic resonance (EDMR) spectrometer to perform sensitive EDMR measurements of 4H-silicon carbide (SiC) metal–oxide–semiconductor field-effect transistors at sub-millitesla (mT) fields. The design enables the detection so-called ultra-strong coupling effects such as multiple-photon transitions and Bloch–Siegert...

A cylindrical hat-loaded method is employed to make monopoles behave as dual band resonators. The two frequency bands are obtained by perturbing higher propagation modes by modifying the hat length. The longer the cylindrical hat is, the lower the resonant frequencies are obtained. The hat length behaves as an inductive load, also increasing the electric length of the monopole. As a result, a c...

This paper presents the result of using a spatial matrix identification method to estimate the rigid body properties of a frame structure. Frequency response functions in three directions at 10 points of the structure are measured by hammer testing. The boundary condition of the structure is free-free. Using the single-input-multiple-output FRFs, the identification method can estimate the rigid...

Vibration energy harvesting is an attractive technique for potential powering of wireless sensors and low power devices. While the technique can be employed to harvest energy from vibrations and vibrating structures, a general requirement independent of the energy transfer mechanism is that the vibration energy harvesting device operate in resonance at the excitation frequency. Most energy harv...