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Opt Express. 2010 Dec 6;18(25):26461-8. doi: 10.1364/OE.18.026461.

Square lattice photonic crystal surface mode lasers.

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  • 1Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University Rm 415, CPT Building, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan. ricky.eo94g@nctu.edu.tw


In this report, we propose a square lattice photonic crystal hetero-slab-edge microcavity design. In numerical simulations, three surface modes in this microcavity are investigated and optimized by tuning the slab-edge termination τ and gradual mirror layer. High simulated quality (Q) factor of 2.3 × 10(5) and small mode volume of 0.105 μm(3) are obtained from microcavity with τ = 0.80. In experiments, we obtain and identify different surface modes lasing. The surface mode in the second photonic band gap shows a very-low threshold of 140 μW and high Q factor of 5,500, which could be an avenue to low-threshold optical lasers and highly sensitive sensor applications with efficient light-matter interactions.

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