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Controlled Transfer of Single Rolled-Up InGaAs–GaAs Quantum-Dot Microtube Ring Resonators Using Optical Fiber Abrupt Tapers

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4 Author(s)
Zhaobing Tian ; Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada ; Feng Li ; Mi, Z. ; Plant, D.V.

We report on the controlled transfer of single rolled-up semiconductor microtube-based optical cavities from their host substrate to a foreign one. Such microtube devices, with diameters of ~5 ??m, wall thicknesses of ~50 nm, and lengths of >100 ??m, are fabricated by selectively releasing a coherently strained InGaAs-GaAs quantum-dot layer from the handling GaAs substrate. With the use of fiber abrupt tapers inserted into two ends of the tubes, rolled-up microtubes are lifted off from the substrate and subsequently transferred, with a precisely controlled position, onto the cleaved facet of a single-mode fiber. The resulting devices exhibit strong coherent emission at room temperature and may lead to integrated micro- and nanoscale lasers with greatly simplified packaging.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 5 )