Technical Physics Letters

, Volume 42, Issue 10, pp 1049–1053 | Cite as

A study of distributed dielectric bragg reflectors for vertically emitting lasers of the near-IR range

  • S. A. Blokhin
  • M. A. Bobrov
  • A. G. Kuzmenkov
  • A. A. Blokhin
  • A. P. Vasil’ev
  • Yu. A. Guseva
  • M. M. Kulagina
  • I. O. Karpovsky
  • Yu. M. Zadiranov
  • S. I. Troshkov
  • N. D. Prasolov
  • P. N. Brunkov
  • V. S. Levitsky
  • V. Lisak
  • N. A. Maleev
  • V. M. Ustinov
Article

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.

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Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  • S. A. Blokhin
    • 1
  • M. A. Bobrov
    • 1
  • A. G. Kuzmenkov
    • 1
    • 2
  • A. A. Blokhin
    • 1
  • A. P. Vasil’ev
    • 1
    • 2
  • Yu. A. Guseva
    • 1
  • M. M. Kulagina
    • 1
  • I. O. Karpovsky
    • 1
    • 3
  • Yu. M. Zadiranov
    • 1
  • S. I. Troshkov
    • 1
  • N. D. Prasolov
    • 1
    • 4
  • P. N. Brunkov
    • 1
    • 4
  • V. S. Levitsky
    • 5
  • V. Lisak
    • 1
    • 4
  • N. A. Maleev
    • 1
  • V. M. Ustinov
    • 1
    • 2
  1. 1.Ioffe Physical Technical InstituteRussian Academy of SciencesSt. PetersburgRussia
  2. 2.Scientific and Technological Center of Microelectronics and Submicron HeterostructuresRussian Academy of SciencesSt. PetersburgRussia
  3. 3.St. Petersburg State Electrotechnical University (LETI)St. PetersburgRussia
  4. 4.St. Petersburg ITMO National Research University of Information Technologies, Mechanics, and Optics (ITMO University)St. PetersburgRussia
  5. 5.Scientific and Technological Center of Thin-Film Technologies in Power EngineeringSt. PetersburgRussia

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