Single-optical-path vector optical field generation method based on birefringent phase plate

Abstract

The invention discloses a single-optical-path vector optical field generation method based on a birefringent phase plate, and relates to the fields of optical-field regulation and control, micro machining and the like. A structure which the method relates to is mainly composed of the birefringent phase plate and a phase demodulation module, and after polarized light passes through the birefringent phase plate and the phase demodulation module in sequence, a needed vector optical field is obtained. The distribution of the generated vector optical field is mainly decided by surface shape distribution on the birefringent phase plate, and a used material is a material with a birefringent effect; according to the birefringent phase plate, phase modulation on incident light is achieved through depth distribution; the phase demodulation module is obtained through derivation according to the relation between target optical-field distribution and the optical field which is generated by the birefringent phase plate; the birefringent phase plate and the phase demodulation module can both be prepared and obtained by adopting a photoetching method.

Description

technical field [0001] The invention relates to the technical field of light field regulation, in particular to a method for generating a single light path vector light field based on a birefringent phase plate. Background technique [0002] In recent years, with the deepening of research, the polarization state of laser has played an increasingly important role in the study of the essential properties of photons and the interaction between light and matter. There are more and more studies on the light field with non-uniform distribution of polarization state. Here, the light field with non-uniform distribution of polarization state in space is called vector light field. The vector properties of the light field have an important influence on the diffraction and spatio-temporal evolution of light waves, resulting in many novel properties different from the scalar light field. [0003] In 2000, the Brown group of the University of Rochester in the United States found that the...

AI Technical Summary

Problems solved by technology

However, limited by the small number of SLM pixels and large pixels, the continuous resolution of the vector light field generated by it is low. When the SLM reaches a certain accuracy, slightly improving its imaging quality will greatly increase the production cost and difficulty. In addition, The damage threshold of liquid crystal is low, which is not conducive to practical application

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