Design of metal-dielectric grating lasers only supporting surface-wave-like modes.
We present a prototype of semiconductor lasers with plasmonic periodic structures that only support transverse-magnetic modes at telecommunication wavelengths. The structure does not sustain transverse-electric guided modes which are irrelevant to surface-wave-enhanced applications, and lasing modes must be surface-wave-like. With thin low-index dielectric buffers near the metal surface, the threshold gain is kept at a decent level around the photonic band edge. Thin windows are then opened on the metal surface to let out significant surface fields. This facilitates usages of surface waves for the spectroscopy and sensing.
Po-Jui
PJ
Chiang
Shu-Wei
SW
Chang
D004867:Equipment Design; D054023:Lasers, Semiconductor; D008027:Light; D008670:Metals / Q000737:chemistry*; D017785:Photons; D012031:Refractometry / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*
D008670:Metals