2d photonic crystal surface emission laser and method for producing same

Abstract

This 2D photonic crystal surface emission laser 10 comprises: a 2D photonic crystal layer 12 having a different refractive index region 122, which comprises a first different refractive index region 1221 and a second different refractive index region 1222 having different refractive indices to a plate-like base material 121, positioned cyclically on the base material 121; and an active layer 11 provided to one side of the base material 121, wherein the planar shape of the first different refractive index region 1211 has a surface area that is greater than or equal to the planar shape of the second different refractive index region 1222, and the first different refractive index region 1221 is thinner than the second different refractive index region 1222. As a result of this configuration,it is possible to have the volumes of the first different refractive index region 1221 and the second different refractive index region 1222 approximate one another, increase the effect of interference of light, the propagation direction of which varies between the two different refractive index regions, and thus obtain laser light having a higher output.

Description

technical field [0001] The invention relates to a semiconductor laser, in particular to a two-dimensional photonic crystal surface-emitting laser for amplifying light by using a two-dimensional photonic crystal and a manufacturing method thereof. Background technique [0002] Semiconductor lasers have many advantages such as small size, low cost, low power consumption, and long life, and are widely used in a wide range of fields such as optical recording light sources, communication light sources, laser displays, laser printers, and laser pointers. On the other hand, in the field of laser processing, a laser having an optical output exceeding at least 1 W is required, but semiconductor lasers currently in practical use cannot achieve this output for the following reasons. Therefore, currently, in the field of laser processing, gas lasers such as carbon dioxide lasers are used instead of semiconductor lasers. [0003] The reason why the optical output of semiconductor lasers...

AI Technical Summary

Problems solved by technology

However, in semiconductor lasers, as the emission area is increased, laser oscillation occurs in more modes, so the wavefront of laser light is disturbed

If the wavefront of the laser light is disturbed, it is difficult to reduce the spot area even if the light is condensed by an optical system

Therefore, in the semiconductor lasers currently in practical use, it is difficult to obtain high light output while reducing the spot area.

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