Study Of Nonpolaritons In A Kerr Nonlinear Optical Resonator

As is well known, light entering a linear polar crystal propagates as phonon polaritons. The phonon polariton is a particle comprised of a photon and a tansverse-optical phonon. The physical effect is basically classical and need not involve quantum mechanics to be understood. However, coherent light entering a nonlinear polar crystal can be converted into a new nonclassical light, which we refer to as superlight. In this paper, we will show that photons in a polar crystal with a high nonlinearity can feel an attractive effective interaction by exchange of virtual TO phonons. The coherent state is unstable with respect to such an interaction, and the superguiding state corresponding to superlight is formed through the association of photons in pairs with opposite wave vectors and spins. My work is study of squeezed properties nonpolaritons in a Kerr nonlinear optical resonator. The existence of nonpolaritons should be testified by observing the energy density dependence of the velocity and squeezing of nonpolaritons. It includes three parts.The first part investigates the theory of superconductivity and its development. It also declare the basic properties of superconductor, eg., zero resistance phenomenon, Meissner effect and isotopic effect etc. the classification of superconductor and some milestones of low temperature superconducting physics.The second part discusses the electronic superconducting theory and the photonic superguiding theory. There are the following contrasts between electrons and photons: Electrons are charged fermions, while photons are neutral bosons; the electronic superconducting state is an equilibrium state, but the photonic superguiding state is a nonequilibrium one; and the excitation spectrum of the electronic superconducting state contains a gap. However, there are the following similarities between the superconducting and superguiding states: supercurrent flowing in a superconductor experiences no resistance and superlight propagating in a waveguide has no scattering losses; the superconducting state excludes magnetic fields and the traveling-wave superguiding state expels vorticity fields; and the magnetic flux in a type-II superconductor is a quantized and the circulation in a standing-wave superguiding state is quantized.The last part studies the nonpolaritons in a Kerr nonlinear optical resonator. we have investigated that in a Kerr nonlinear optical resonator, the photon system possesses a new kind of quasi-particle, the nonpolariton. The existence of nonpolaritons should be testified by observing the energy density dependence of the velocity and squeezing of nonpolaritons. It is found that the transition energy density of a Kerr nonlinear optical resonator is larger than that of a normal state.