Ruoyu Yuan

Research Background and Preparations Note: because the research doesn’t fully accomplish, only background shows on this post. The main contents will show after the publication of the paper. Transition metal dichalcogenide, which is known as “TMDC”, is a type of van der waals materials. The structure is built by a number of atom layers with […]

Introduction UWB signals is short for ultra wideband signals, which define as those whose 10dB bandwidth is larger than 500MHz and locate within 3.1-10.6GHz. It gains much attention because of its potential of transmitting large volume of data. The waveform of a UWB signal is under heated discussion. The spectrum of an ideal UWB waveform

Research Background In the field of Wave Optics, formulas of diffraction is so complicated and sometimes may not even find analytical solutions. To simplify them, paraxial approximation is widely used to solve actual problems. For instance, Fraunhofer diffraction describes well for far-field diffraction as an approximation of Fresnel diffraction. In Young’s double-slit interference, the result

Research Background The Semiconductor Optical Amplifier known as SOA is an active device. The current pumping source provides the device with abundant electronic carriers, which easily bind with holes and release energy as photons. For stimulated emission, it requires these generated photons to carry the same information with input light. The more currents come into

Research Background The graphene material known as one of two-dimensional materials has brilliant electrical and optical properties. The graphene mainly interacts with in-plane electromagnetic field and shows great electro absorption ability, which makes it potential for an optoelectronic modulator. For monolayer graphene, we can control electro absorption ability by applying different voltages on electrodes. Typically,

Research Background and Thesis Main Contents (Optical UWB Signals Generation Based on Lithium Niobate Electro-optic Modulator) With the continuous development of communication technology, people’s requirements for communication are also rising. Wireless ultra wide band signals (UWB signals) get a lot of attention because of its high data transmission rate. In order to overcome the limitation