| 摘要 |
A broadband three-port optical circulator having introduced therein a triangular guide column, comprising two-dimensional triangular lattice photonic crystals constituted by first medium material columns (02) in a low refractive index background medium (01) and three corresponding ports (11, 12, and 13) provided with three photonic crystal branch waveguides and distributed at the periphery of the photonic crystals. One second medium material column (03) is arranged at the center at where the three photonic crystal branch waveguides converge, three identical magneto-optical material columns (A, B, and C) respectively are arranged around the second medium material column, the three magneto-optical material columns (A, B, and C) are in a rotationally symmetrical distribution at 120° around the center at where the three branch waveguides intersect, and each of the magneto-optical material columns (A, B, and C) is arranged on the axis of the branch waveguide at where each is located. An electromagnetic signal is inputted from any one port and is outputted from the adjacent port adjacent thereto, while the other port is in an isolated state, thus allowing unidirectional optical circulator transmission. The optical circulator is structurally compact and easy to assemble. |
