Quantum Process Tomography Of Plasmon And Establishment Of Quantum Squeezed Light Source

Quantum optics is one of the most impressive physics research in the world.The breakthroughs in quantum source,quantum computer,quantum communication,and quantum precision measurement will reform the scientific technology,greatly enhance the productivity,and come up with new industrial revolution.Up to date,many research institutions and companies have paid a lot of attentions on quantum optics and various new physics phenomena have come to light.Plasmon,meta-materials and other new materials are also attracting research interests because they are small,lossless,integrated and with fine optical character.Such materials are promising in traditional applications such as data storage,super-resolution imaging,light collimation,solar cell,biological sensors and negative refractive index material.In addition,they have potential applications in quantum information procession and quantum communications.This thesis is about quantum process tomography of plasmon and establishment of quantum squeezed light source.The details are listing as follows.1.We establish the quantum process tomography setup,simulate the periodic gold holes with extraordinary optical transmission,and fabricate a plasmon sample with transmission of 62%with focus ion beam technology.We measure the quadrature components of the input and output lights.After calculating the density matrix with maximum likelihood estimation and recovering the process tensor of sample,we analyze the amplitude and phase changes introduced by the sample.The results show that the amplitude change is similar with a splitter model while the phase change is in accord with the Wigner function.The process tensor shows the quantum properties of light remain after such a photon-plasmon conversion process.2.We establish the quantum squeezed light source,which can output amplitude or phase squeezed light.The experimental setup includes second harmonic generation cavity,optical parameter amplifier cavity and squeezed light measurement system.We design and optimize the parameters of above two cavities with temperature control system and locking system.The second harmonic generation cavity outputs stable 532nm green light.The OPA cavity works at parameter amplify or parameter anti-amplify mode,which amplifies the signal light and output squeezed light.The measurement system can measure the phase quadrature noise of light.After comparing with the classical light,we obtain the squeezed light in the experiment.