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A study of distributed dielectric bragg reflectors for vertically emitting lasers of the near-IR range
- Source :
- Technical Physics Letters. 42:1049-1053
- Publication Year :
- 2016
- Publisher :
- Pleiades Publishing Ltd, 2016.
-
Abstract
- Studies aimed at optimization of the design of a dielectric distributed Bragg reflector (DBR) produced by the reactive magnetron sputtering method for applications in near-IR vertical-cavity surface-emitting lasers with intracavity contacts (ICC-VCSELs) are carried out. It is shown that the reflectivity of the dielectric DBRs based on SiO2/TiO2 decreases due to the polycrystalline structure of the TiO2 layers, which causes diffusive scattering of light. In contrast, amorphous Ta2O5 layers is characterized by a low surface roughness and low fluctuation in the refractive index. Single-mode ICC-VCSELs in the 980-nm spectral range with dielectric DBR based on SiO2/Ta2O5 with a threshold current less than 0.27 mA, electric resistance of less than 200 Ω, and differential efficiency of more than 0.8 W/A are demonstrated.
- Subjects :
- 010302 applied physics
Materials science
Physics and Astronomy (miscellaneous)
business.industry
02 engineering and technology
Dielectric
021001 nanoscience & nanotechnology
Laser
Distributed Bragg reflector
01 natural sciences
Light scattering
Amorphous solid
law.invention
Optics
Sputtering
law
0103 physical sciences
Surface roughness
Optoelectronics
0210 nano-technology
business
Refractive index
Subjects
Details
- ISSN :
- 10906533 and 10637850
- Volume :
- 42
- Database :
- OpenAIRE
- Journal :
- Technical Physics Letters
- Accession number :
- edsair.doi...........fcce923d48ed03ff7713f2340e9bbdf2