Quality factors of nonideal micro pillars

The influence of fabrication-induced imperfections and material absorption on the quality (Q) factor of a microcavity pillar is studied numerically. The dependence on sidewall inclination, selective underetch, and intrinsic loss is quantified. The authors show that imperfections can lead to an improvement in Q and that a sidewall inclination angle of less than 1° causes a dramatic change in the Q factor. The variations in Q can be attributed to a delicate balance between effective index contrasts, mode overlap, and higher-order mode contributions.

[1]  Johann Peter Reithmaier,et al.  Semiconductor quantum dot microcavity pillars with high-quality factors and enlarged dot dimensions , 2005 .

[2]  E. Yablonovitch,et al.  Inhibited spontaneous emission in solid-state physics and electronics. , 1987, Physical review letters.

[3]  P. Lalanne,et al.  Energy transfer through laterally confined Bragg mirrors and its impact on pillar microcavities , 2005, IEEE Journal of Quantum Electronics.

[4]  I. Sagnes,et al.  Reactive-ion etching of high-Q and submicron-diameter GaAs∕AlAs micropillar cavities , 2005 .

[5]  R. Baets,et al.  Analysis of cylindrical waveguide discontinuities using vectorial eigenmodes and perfectly matched layers , 2001 .

[6]  Lifeng Li.  Formulation and comparison of two recursive matrix algorithms for modeling layered diffraction gratings , 1996 .

[7]  Philippe Lalanne,et al.  Electromagnetic study of the quality factor of pillar microcavities in the small diameter limit , 2004 .

[8]  E. Moreau,et al.  Towards a single-mode single photon source based on single quantum dots , 2001 .

[9]  Axel Scherer,et al.  Optimization of Three-Dimensional Micropost Microcavities for Cavity Quantum Electrodynamics , 2002 .

[10]  R. Braive,et al.  Submicron-diameter semiconductor pillar microcavities with very high quality factors , 2007 .

[11]  S. Adachi,et al.  Properties of Aluminium Gallium Arsenide , 1993 .

[12]  E. Purcell,et al.  Resonance Absorption by Nuclear Magnetic Moments in a Solid , 1946 .

[13]  V. Kulakovskii,et al.  Strong coupling in a single quantum dot–semiconductor microcavity system , 2004, Nature.