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Optics Letters

Optics Letters


  • Vol. 30, Iss. 3 — Feb. 1, 2005
  • pp: 257–259

Proposal for ideal 3-dB splitters-combiners in photonic crystals

Sangin Kim, Ikmo Park, and Hanjo Lim  »View Author Affiliations

Optics Letters, Vol. 30, Issue 3, pp. 257-259 (2005)

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We propose a structure for ideal 3-dB splitters (1×2)-combiners (2×1) in photonic crystals. In photonic crystals, ideal 3-dB splitters based on a three-port system are achievable in principle, but it is impossible to achieve ideal 3-dB combiners based on the three-port system because there is no path for a loss, owing to strong confinement of photons. The proposed structure is based on a four-port system in which the concept of a microwave circuit, the so-called rat-race circuit is adopted. Design conditions for two-dimensional photonic-crystal-based rat-race circuits have been investigated by use of the coupled-mode theory in time. With the proposed structure, a 3-dB splitter-combiner has been designed. The performance of the device was numerically calculated by the finite-difference time-domain method.

© 2005 Optical Society of America

OCIS Codes
(130.1750) Integrated optics : Components
(130.2790) Integrated optics : Guided waves
(230.1360) Optical devices : Beam splitters
(230.7370) Optical devices : Waveguides

Sangin Kim, Ikmo Park, and Hanjo Lim, "Proposal for ideal 3-dB splitters-combiners in photonic crystals," Opt. Lett. 30, 257-259 (2005)

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