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Coupled optical microcavities in one-dimensional photonic bandgap structures

Mehmet Bayindir1, C Kural and E Ozbay

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We present a detailed theoretical and experimental study of the evanescent coupled optical microcavity modes in one-dimensional photonic bandgap structures. The coupled-cavity samples are fabricated by depositing alternating hydrogenated amorphous silicon nitride and silicon oxide layers. Splitting of the eigenmodes and formation of a defect band due to interaction between the neighbouring localized cavity modes are experimentally observed. Corresponding field patterns and the transmission spectra are obtained by using transfer matrix method (TMM) simulations. A theoretical model based on the classical wave analogue of the tight-binding (TB) picture is developed and applied to these structures. Experimental results are in good agreement with the predictions of the TB approximation and the TMM simulations.


PACS

42.70.Qs Photonic bandgap materials

42.82.Cr Fabrication techniques; lithography, pattern transfer

71.15.Ap Basis sets (LCAO, plane-wave, APW, etc.) and related methodology (scattering methods, ASA, linearized methods, etc.)

63.20.Pw Localized modes

02.10.Yn Matrix theory

Subjects

Mathematical physics

Condensed matter: electrical, magnetic and optical

Optics, quantum optics and lasers

Condensed matter: structural, mechanical & thermal

Dates

Issue 6 (November 2001)

Received 7 August 2001, in final form 14 September 2001

Published 26 October 2001



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