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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 26 — Dec. 22, 2008
  • pp: 21512–21521

Attempts to grow optically coupled Fibonacci-spaced InGaAs/GaAs quantum wells result in surface gratings

B. C. Richards, J. Hendrickson, J. Sweet, G. Khitrova, D. Litvinov, D. Gerthsen, B. Myer, S. Pau, D. Sarid, M. Wegener, E. L. Ivchenko, A. N. Poddubny, and H. M. Gibbs  »View Author Affiliations

Optics Express, Vol. 16, Issue 26, pp. 21512-21521 (2008)

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An instability in the growth of nonperiodic InGaAs/GaAs multiple quantum well samples, ordinarily of high-quality when grown with equal periods of order of half the wavelength of light in the material, leads to a dramatic microscopic, self-organized surface grating. This effect was discovered while growing quantum wells with two unequal barrier lengths arranged in a Fibonacci sequence to form an optical quasicrystal. A laser beam incident normal to the surface of the sample is diffracted into a propeller-shaped pattern. The sample surface has a distinctly cloudy appearance when viewed along one crystal axis but is mirror-like when the sample is rotated 90°. The instability results in a five-fold increase in the absorption linewidth of the heavy-hole exciton transition. Atomic force microscopy, transmission electron microscopy, and scanning electron microscopy were used to study the samples.

© 2008 Optical Society of America

OCIS Codes
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(350.2770) Other areas of optics : Gratings
(220.4241) Optical design and fabrication : Nanostructure fabrication
(160.5293) Materials : Photonic bandgap materials

ToC Category:
Photonic Crystals

Original Manuscript: September 16, 2008
Revised Manuscript: December 3, 2008
Manuscript Accepted: December 11, 2008
Published: December 15, 2008

B. C. Richards, J. Hendrickson, J. Sweet, G. Khitrova, D. Litvinov, D. Gerthsen, B. Myer, S. Pau, D. Sarid, M. Wegener, E. L. Ivchenko, A. N. Poddubny, and H. M. Gibbs, "Attempts to grow optically coupled Fibonacci-spaced InGaAs/GaAs quantum wells result in surface gratings," Opt. Express 16, 21512-21521 (2008)

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