A one-dimensional coaxial connector photonic crystal has constructed from a series of standard high frequency coaxial cable “tee” and “barrel” connectors, forming a quasi-one-dimensional periodic system with periodicities comparable to microwave wavelengths. At the appropriate frequencies, “Bragg-like” reflections of the gigahertz-frequency sinusoidal signals from the open ends of the tee connectors result in the formation of stop bands for which transmission of signals at these frequencies is forbidden. Changing the amplitude or/and phase of these reflections is analogous to the introduction of defects (impurities) in the periodic structure and is evidenced by appearance of impurity peaks of enhanced transmission in the stop bands. This system readily allows fixing of the defect location within a unit cell to one particular configuration. It also allows a direct control over the location of defects relative to each other. By using this system a wide variety of impurity-induced effects in photonic crystals such as surface effects, inter-impurity interactions, and stop band widening have been demonstrated.

• Received 11 December 1998

DOI:https://doi.org/10.1103/PhysRevB.60.2410