PT Journal AU Kim, M Vosoughi Lahijani, B Descharmes, N Straubel, J Negredo, F Rockstuhl, C Häyrinen, M Kuittinen, M Roussey, M Herzig, HP TI Subwavelength Focusing of Bloch Surface Waves SO ACS photonics PY 2017 BP 1477 EP 1483 VL 4 IS 6 DI 10.1021/acsphotonics.7b00245 LA english ER