We experimentally study surface plasmon lasing in a series of metal hole arrays on a gold-semiconductor interface. The sub-wavelength holes are arranged in square arrays of which we systematically vary the lattice constant and hole size. The semiconductor medium is optically pumped and operates at telecom wavelengths (¿ ~ 1.5 µm). For all 9 studied arrays, we observe surface plasmon (SP) lasing close to normal incidence, where different lasers operate in different plasmonic bands and at different wavelengths. Angle- and frequency-resolved measurements of the spontaneous emission visualizes these bands over the relevant (¿, k||) range. The observed bands are accurately described by a simple coupled-wave model, which enables us to quantify the backwards and right-angle scattering of SPs at the holes in the metal film.
Exter, van, M. P., Tenner, V. T., Beijnum, van, F., Dood, de, M. J. A., Veldhoven, van, P. J., Geluk, E. J., & Hooft, 't, G. W. (2013). Surface plasmon dispersion in metal hole array lasers. Optics Express, 21(22), 27422-27437. https://doi.org/10.1364/OE.21.027422