Fig. 2.

Optical properties of intercavity gaps depend upon geometric factors. (A and B) Numerically simulated optical properties of the gap between 100-nm radius GaN nanowires with triangular cross-sections on glass substrates at the wavelength of 370 nm. (C) Simulated electric field maps with gap widths of 20, 100, 150, and 200 nm. The TM00 guided mode was injected from the top edge of the images. The white dashed lines indicate the boundaries of the nanowires. Significant diffraction loss can be seen at gap widths larger than 100 nm.