Study On Optical Field Manipulation And Super-resolution Imaging In Waveguide Arrays

The integrated optical circuit is expected to be a new generation of information carriers due to its high speed,broad bandwidth,low loss and large information capacity.Unfortunately,conventional integrated optical circuit encounters difficulties in miniaturization and inte gration due to the constraints of the diffraction limits.While the plasmonic polaritons with localization and field enhancement effects can break through the diffraction limit and provide a good platform for the realization of optics integration.And because of the resemblance between the optical propagation field of waveguide array and the quantum mechanics equation,one can simulate the complex physical effects in condensed matter and quantum realm with relatively simple optical systems according to these similar properties.In this paper,we systematacially study the beam evolution in waveguide arrays including the photon angular density of state and the influence of excitation on beam propagation,and two works are carried out focusing on plasmonic waveguide arrays:1.Based on the plasmonic waveguide arrays,we realize the optical simulation of massless Dirac Fermion.We study the fundamental mode properties and coupling characteristics of the waveguide modes with coupled mode theory and construct a binary plasmonic waveguide array(PWA)with alternating positive and negative coupling coefficients by changing the gap between two waveguides.While the alternating coupling coefficients have same magnitude and opposite sign,the bandstructure of the PWA is the same as that of massless Dirac Fermion at the center of Brillouin zone.With approp:riate excitation conditions,the beam forms a non-divergent linear diffraction in the waveguide array which is the optical representation of the massless Dirac Fermion.2.We build zoomed superlens to achieve super-resolution imaging based on the conjugate plasmonic waveguide array.On the basis of complemental hyperbolic metamaterials,we realize the design of zoomed superlens and construct a set of conjugate waveguide array with positive and negative coupling coefficients to demonstrate the zoomed superlens in one dimension.The conjugate waveguide arrays have positive and negative coupling coefficients in the two stages.And through changing the coupling strength of the two stages,we can obtain the zooming effect.Moreover,from the practical application point of view,in this paper we also make a research on lensless imaging based on imaging chip,including the diffraction image acquisition and image reconstruction methods.We can also reconstruct image in in-line holographic systems in our own experimental platform.