We demonstrate the excitation of surface lattice resonances on a flat semiconductor by optical illumination of the surface. This illumination is done with a spatial light modulator that defines periodic arrays of resonant structures by local photo-excitation of free charges on the semiconductor. This approach enables a full optical control of surface modes at THz frequencies.


Schaafsma, M. C., Georgiou, G., & Gómez Rivas, J. (2016). Photo-generated THz resonances and surfaces waves. In CLEO: Science and Innovations 2016, held in San Jose, California United States 5–10 June 2016. doi:10.1364/CLEO_SI.2016.STh1I.3