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Optical modes in semiconductor microtube ring resonators.

T Kipp1, H Welsch, Ch Strelow

  • 1Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, 20355 Hamburg, Germany. ktipp@physnet.uni-hamburg.de

Physical Review Letters
|April 12, 2006
PubMed
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We demonstrate optical modes in InGaAs/GaAs microtubes functioning as ring resonators. These microtubes, fabricated using lithography and self-rolling bilayers, show sharp optical modes matching theoretical predictions.

Area of Science:

  • Optoelectronics
  • Materials Science
  • Nanotechnology

Background:

  • Optical ring resonators are crucial for integrated photonics.
  • Fabricating complex microstructures with precise optical properties remains challenging.

Purpose of the Study:

  • To demonstrate optical modes in InGaAs/GaAs microtubes.
  • To investigate their potential as optical ring resonators.

Main Methods:

  • Fabrication of self-supporting microtubes using optical lithography and wet-etching.
  • Utilizing the self-rolling mechanism of strained bilayers for microtube formation.
  • Probing optical modes via photoluminescence of embedded InAs quantum dots.

Main Results:

  • Successfully fabricated InGaAs/GaAs microtubes.

Related Experiment Videos

  • Observed a spectrum of sharp optical modes within the microtubes.
  • Demonstrated the microtubes' functionality as optical ring resonators.
  • Experimental results showed excellent agreement with theoretical models for closed thin dielectric waveguides.

    • Conclusions:

    • InGaAs/GaAs microtubes can effectively function as optical ring resonators.
    • The fabrication method enables the creation of novel micro-optical devices.
    • This work opens avenues for advanced photonic integrated circuits.