WAVEGUIDE LENS INCLUDING PLANAR WAVEGUIDE AND MEDIA GRATING

摘要

A waveguide lens includes a substrate, a planar waveguide, a media grating, a pair of first electrodes, and a pair of second electrodes. The planar waveguide is formed on the substrate and is coupled with a laser light source, which emits a laser beam having a divergent angle into the planar waveguide. The media grating is formed on the planar waveguide. The pair of first electrodes is configured to change an effective refractive index of the planar waveguide, utilizing an electro-optical effect, when a first modulating electric field is applied, where the effective refractive index is corresponding to a transverse electric wave. The pair of second electrodes is configured to change an effective refractive index of the planar waveguide, utilizing an electro-optical effect, when a second modulating electric field is applied, where the effective refractive index is corresponding to a transverse magnetic wave.

主权项

1. A waveguide lens, comprising:
a substrate comprising a top surface and an opposite bottom surface; a planar waveguide formed on the top surface of the substrate, the planar waveguide coupled with a laser light source which emits a laser beam having a divergent angle into the planar waveguide; a media grating formed on the planar waveguide; a pair of first electrodes arranged on the planar waveguide, the pair of first electrodes comprising a first modulating electrode and a first ground electrode; and a pair of second electrodes comprising a second modulating electrode and a second ground electrode; wherein the first modulating electrode and the first ground electrode are arranged at two opposite sites of the media grating; the second modulating electrode overlaying the media grating; the second ground electrode is opposite to the second modulating electrode; the pair of first electrodes configured to change an effective refractive index of the planar waveguide, utilizing an electro-optical effect, when a first modulating electric field is applied, wherein the effective refractive index is corresponding to a transverse electric wave of the laser beam; the pair of second electrodes configured to change an effective refractive index of the planar waveguide, utilizing an electro-optical effect, when a second modulating electric field is applied, wherein the effective refractive index is corresponding to a transverse magnetic wave of the laser beam.