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Opt Express. 2010 Apr 26;18(9):8790-9. doi: 10.1364/OE.18.008790.

Subwavelength metal-optic semiconductor nanopatch lasers.

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Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA.


We report on near infrared semiconductor nanopatch lasers with subwavelength-scale physical dimensions (0.019 cubic wavelengths) and effective mode volumes (0.0017 cubic wavelengths). We observe lasing in the two most fundamental optical modes which resemble oscillating electrical and magnetic dipoles. The ultra-small laser volume is achieved with the presence of nanoscale metal patches which suppress electromagnetic radiation into free-space and convert a leaky cavity into a highly-confined subwavelength optical resonator. Such ultra-small lasers with metallodielectric cavities will enable broad applications in data storage, biological sensing, and on-chip optical communication.

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