Linear and non-linear behavior of cavity polaritons

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• 作者：Houdré ; R. ; Weisbuch ; C. ; Stanley ; R.P. ; Oesterle ; U. ; Ilegems ; M.
• 关键词：42.55.Sa ; 42.50.&minus ; p ; 42.65&minus ; k ; 71.35.Cc ; 71.36.+c ; 74.25.Kc ; Semiconductor microcavity ; Polaritons ; Non-linear optics ; Optical pattern formation ; Phonon
• 刊名：Physica E
• 出版年：2000
• 出版时间：May, 2000
• 年：2000
• 卷：7
• 期：3-4
• 页码：625-630
• 全文大小：508 K

文摘

We report on the linear and non-linear emission of cavity-polaritons under resonant excitation. At low excitation density, in addition to polariton photoluminescence, strong Rayleigh scattering is observed. At higher excitation densities, a sudden transition to a highly emissive state is observed, accompanied by spatial patterning. We attribute such phenomena to a combination of nonlinear cavity-polariton relaxation mechanism and nonlinear response of the cavity, leading to transverse pattern formation. A careful analysis of near- and far-field emission patterns with spatial filtering as well as reflectivity shows that an inhomogeneous situation develops, the center of the excited region undergoing a strong to weak coupling transition while the periphery is still in strong coupling. Despite the complex non-linear behavior we observe no signatures of Bose–Einstein condensation or Boser action.