Record performance of electrical injection sub-wavelength metallic-cavity semiconductor lasers at room temperature.

Optics express

PubMedID: 23482005

Ding K, Hill MT, Liu ZC, Yin LJ, van Veldhoven PJ, Ning CZ. Record performance of electrical injection sub-wavelength metallic-cavity semiconductor lasers at room temperature. Opt Express. 2013;21(4):4728-33.
We demonstrate a continuous wave (CW) sub-wavelength metallic-cavity semiconductor laser with electrical injection at room temperature (RT). Our metal-cavity laser with a cavity volume of 0.67?3 (? = 1591 nm) shows a linewidth of 0.5 nm at RT, which corresponds to a Q-value of 3182 compared to 235 of the cavity Q, the highest Q under lasing condition for RT CW operation of any sub-wavelength metallic-cavity laser. Such record performance provides convincing evidences of the feasibility of RT CW sub-wavelength metallic-cavity lasers, thus opening a wide range of practical possibilities of novel nanophotonic devices based on metal-semiconductor structures.