Patent ID: 6853791

Claim:
A two-dimensional photonic crystal slab structure comprising: a photonic crystal slab comprising a two-dimensional periodic lattice of substantially circular holes with a lattice constant; a first line of defects defining a first waveguide portion in said two-dimensional periodic lattice, said first line of defects comprising holes having a substantially noncircular cross-section, said holes having a size and arrangement such that said holes do not physically contact said circular holes; and a second line of defects defining a second waveguide portion in said two dimensional periodic lattice, said second waveguide portion proximate to and oriented at an angle with respect to said first waveguide portion such that an electromagnetic wave propagating in a first direction along said first line of defects is caused to propagate in a second direction along said second line of defects wherein said second direction is oriented at said angle with respect to said first direction.