Electromagnetic cavity with arbitrary Q and small modal volume without a complete photonic bandgap

Electromagnetic cavity with arbitrary Q and small modal volume without a complete photonic bandgap

We show how an electromagnetic cavity with arbitrarily high Q and small (bounded) modal volume can be formed in two or three dimensions with a proper choice of dielectric constants. Unlike in previous work, neither a complete photonic bandgap nor a trade-off in mode localization for Q is required. R...

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Veröffentlicht in:Optics letters 2002-10, Vol.27 (20), p.1785-1787
Hauptverfasser: Watts, M R, Johnson, S G, Haus, H A, Joannopoulos, J D
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creator Watts, M R
Johnson, S G
Haus, H A
Joannopoulos, J D
description We show how an electromagnetic cavity with arbitrarily high Q and small (bounded) modal volume can be formed in two or three dimensions with a proper choice of dielectric constants. Unlike in previous work, neither a complete photonic bandgap nor a trade-off in mode localization for Q is required. Rather, scattering and radiation are prohibited by a perfect mode match of the TE-polarized modes in each subsection of a Bragg resonator. Q values in excess of 10(5) are demonstrated through finite-difference time-domain simulations of two- and three-dimensional structures with modal areas or volumes of the order of the wavelength squared or cubed.
doi_str_mv 10.1364/ol.27.001785
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title Electromagnetic cavity with arbitrary Q and small modal volume without a complete photonic bandgap
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