Figure 1: Left: Principle of operation of superconducting microresonator detectors, following[1]. The absorbed photon energy breaks Cooper electron pairs in a thin superconducting film (a) which is part of a lithographed microresonator circuit (b). The breaking of Cooper pairs causes a change in the surface reactance and resistance of the film, leading to a shift in the resonance frequency fr a...

It has been shown that strong optical injection locking can significantly enhance the resonance frequency of semiconductor lasers. In this Letter, we describe the trade-off between the maximum resonance frequency enhancement and the quality factor (Q) of the lossless laser cavity and show that the time-bandwidth product (product of photon lifetime and maximum resonance frequency) is equal to on...

Future deployment of wireless sensor networks will ultimately require a self-sustainable local power source for each sensor, and vibration energy harvesting is a promising approach for such applications. A requirement for efficient vibration energy harvesting is to match the device and source frequencies. While techniques to tune the resonance frequency of an energy harvesting device have recen...

The frequency dependences of complex initial permeability for triplecomponent composite materials based on two different types of ferrite filler (MnZn and NiZn ferrite) and a nonmagnetic polymeric matrix (PVC) were studied in the frequency range of 10 kHz–1 GHz. The frequency dispersion of permeability is discussed by means of a dynamic model based on the superposition of the two types of magne...

We investigate the frequency dispersion of complex permeability in GHz range superparamagnetic nickel–zinc ferrite thin films with different Ni/Zn ratios using a microstrip probe. The films, comprising crystallites as small 3 nm and deposited by microwave-irradiation-assisted solvothermal method, exhibit coexistence two resonance characteristics—a ferromagnetic peak ([Formula: see text]) at ∼2 ...