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Department of Physics

Staff profile

Publication details for Prof Richard Abram

Brand, S, Abram, RA & Kaliteevski, MA (2010). Evanescently coupled interface states in the gap between two Bragg reflectors. Optics Letters 35(12): 2085-2087.

Author(s) from Durham

Abstract

Interface states are known to exist at the surface of an appropriately structured Bragg reflector. If such reflectors are
present on the surfaces of two prisms separated by a narrow gap, the evanescently coupled interface states can
interact to produce a pair of very narrow transmission lines, the separation of which can be adjusted by varying
the size of the gap between the two prisms. Thus, although only a single cavity is involved, the spectral properties
of the system are similar to those of a dual-cavity photonic microstructure. In addition to other potential applications,
we propose that such a structure could form the basis of an adjustable beat-frequency emitter in the terahertz
regime.