Quantum frequency conversion (QFC), a critical technology in photonic quantum information science, requires that the characteristics of frequency-converted photon must be same as input except for color. In nonlinear optics, wave mixing effect far away from resonance condition is often used to realize QFC because it can prevent vacuum field reservoir destroying state converted effectively. Under...

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract In AC to DC converters, power factor has significant importance. Most power converters and equipments are developed to have power factor correction technology to improve their performance. A soft-switching two-switch resonant ACDC converter with hi...

The need for advanced materials capability has never been as great as at this time in our nation's history. Energy shortages demand more efficient operation of existing equipment of all types as well as new and imaginative methods of power conversion. Advanced materials are the key to achieving improved performance via higher cycle operating temperatures, lighter structural components, and adeq...

Efficient frequency conversion of photons has important applications in optical quantum technology because the range suitable for photon manipulation and communication usually varies widely. Recently, an efficient system using a double-$\Lambda$ four-wave mixing (FWM) process based on electromagnetically induced transparency (EIT) attracted considerable attention its potential to achieve nearly...

This paper introduces a new bidirectional, isolated dc–dc converter. A typical application for this converter can be found in the auxiliary power supply of hybrid electric vehicles. A dual half-bridge topology has been developed to implement the required power rating using the minimum number of devices. Unified zero-voltage switching was achieved in either direction of power flow with neither a...

abstract: the main aim of the vibration energy harvesters is to locally power autonomous devices such as wireless sensors. generally, power levels are low and the environmental benefit of the technology is to replace batteries rather than saving energy per se. piezoelectric vibrational energy harvesters are usually inertial mass based devices, where a cantilever beam with a piezoelectric outer ...

This paper analyses and designs a kind of wireless power transmission system via near field resonant coupling. It introduces the wireless power transmission technology, and combination of traditional inductive coupling and resonance. The project consists of modeling and construction of the hardware to prove the feasibility of wireless power transmission using near field resonant coupling. The h...