Multidimensional Four-wave-mixing Spectroscopy With Squeezed Light

The light field exhibits classical characteristics in the classical world.At the same time,the light field also has quantum characteristics.The characteristics of light in the quantum light field cannot be explained by classical optical theory.We call it non-classical characteristics.There are three non-classical characteristics in the experiment photon anti-bunching,sub-Poissonian statistics and squeezed state.Squeezed light is an important non-classical light state of quantum optical experiments.It is applied widely in quantum information,quantum communication,and precise measurement etcThe HBT experiment in 1956 caused people to study the squeezed state.The United States’s Bell LABS first observed squeezed state in experiment in 1985.They use non-degenerate four-wave mixing device of sodium atom vapor.Since then,the four-wave mixing process has become a hotspot in the quantum optics field.Four-wave mixing is a non-linear interaction between light and matter that permits the transfer of energy and momentum between four modes of the electric field via interaction with medium.Typically,a high intensity pump light is used to induce a strong non-linear polarization in the medium,which then causes the medium to interact with other field modes.Based on the work of predecessors,there schemes based on solid materials achieved easily has been proposed and investigated in this thesis,which scheme can get better squeezing measurementA new type of nonlinear spectroscopic signals with quantum light is proposed.It involves a strong pump with frequency ωpu and weak probe at ωpr interacting with in a solid state target to generate a conjugated beam ωc=2ωpu-ωpr via nondegenerate four-wave mixing.The outgoing squeezed probe and conjugate beams are quantum.And carry information about the material system.Via the χ(3)susceptibility which can be measured by the noise spectra of the intensity difference We discuss three spectroscopic setups based on squeezed light.First,single four-wave mixing in a single crystal.Second,cascading scheme involving two crystals.Third,an SU(1,1)interferometer based on two separate four-wave mixing processes.We further investigate the microscopic noise and optical losses in all three setups.Simulations are performed for silicon-vacancy color centers in diamond.