title: Square lattice photonic crystal surface mode lasers.
abstract: 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.
authors.affiliation: Department 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
authors.forename: Tsan-Wen
authors.initials: TW
authors.lastname: Lu
authors.forename: Shao-Ping
authors.initials: SP
authors.lastname: Lu
authors.forename: Li-Hsun
authors.initials: LH
authors.lastname: Chiu
authors.forename: Po-Tsung
authors.initials: PT
authors.lastname: Lee
mesh_terms: D017076:Computer-Aided Design; D003460:Crystallization; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D007909:Lenses; D017785:Photons; D012031:Refractometry / Q000295:instrumentation*