60 2 COMPACT OPTICAL KEY BASED ON A TWO-DIMENSIONAL PHOTONIC CRYSTAL WITH 60 DEGREE FOLDING

摘要

The present invention is based on a two-dimensional photonic crystal in which defects are inserted in a controlled manner to cause resonant cavities with the waveguides that make up the device. The main function is in the control of the passage of electromagnetic signals that allow passage (off state) or on (on state) of passage along a communication channel. The present invention also has the ability to change the propagation direction of electromagnetic signals through a 60 degree angle and provides greater flexibility in the structure of integrated optical systems. The operating principle of the device is related to the excitation of dipole modes in the resonant cavity, which is based on a magneto-optical material. Switch DC external magnetic field H when the _zero is applied, a dipole mode in which the rotation here in the cavity and to the output from the input unit allows the passage of the signal (the ON state), on the other hand, in the absence of the application of H _g, the joint here The stopped dipole mode allows nodes to align with the output waveguide and prevent the passage of the signal from the input to the output (off state).