| 摘要 |
<p>PURPOSE:To realize polarization stability of a surface emitting laser, by controlling the polarization direction of a surface emitting laser outputting light vertically to the substrate surface, by using the double refraction and the phase difference of a compound reflecting mirror constituted of a metal/dielectric diffraction grating polarizer and a semiconductor multilayered reflecting mirror. CONSTITUTION:A metal/dielectric diffraction grating polarizer which exhibits double refraction for perpendicularly intersecting polarizations is introduced into the upper part of a semiconductor multilayered film reflecting mirror forming the resonator of a surface emitting laser, and a compound reflecting mirror is formed. Metal, e.g. Au, whose imaginary part of refractive index is large for light wavelength, and dielectric, e.g. SiO2, which is transparent to light wavelength are used, and a diffraction grating polarizer is formed. As a semiconductor multilayered film reflecting mirror, e.g. a GaAs/AlAs multilayered film reflecting mirror (GaAs/AlAs DRB layer), is used. By considering the double refraction and the phase difference in the compound reflecting mirror, stable polarization dependency for perpendicularly intersecting polarizations can be realized.</p> |
