Light-Matter Interactions in Cesium Lead Halide Perovskite Nanowire Lasers.
Light-matter interactions in inorganic perovskite nanolasers are investigated using single-crystalline cesium lead halide (CsPbX3, X = Cl, Br, and I) nanowires synthesized by the chemical vapor transport method. The perovskite nanowires exhibit a uniform growth direction, smooth surfaces, straight end facets, and homogeneous composition distributions. Lasing occurs in the perovskite nanowires at low thresholds (3 μJ/cm(2)) with high quality factors (Q = 1200-1400) under ambient atmospheric environments. The wavelengths of the nanowire lasers are tunable by controlling the stoichiometry of the halide, allowing the lasing of the inorganic perovskite nanowires from blue to red. The unusual spacing of the Fabry-Pérot modes suggests strong light-matter interactions in the reduced mode volume of the nanowires, while the polarization of the lasing indicates that the Fabry-Pérot modes belong to the same fundamental transverse mode. The dispersion curve of the exciton-polariton model suggests that the group refractive index of the polariton is significantly enhanced.
Department of Chemistry, Korea University , Jochiwon 339-700, Korea.
Kidong
K
Park
Department of Chemistry, Kyung Hee University , Seoul 130-701, Korea.
Jong Woon
JW
Lee
Department of Chemistry, Korea University , Jochiwon 339-700, Korea.
Jun Dong
JD
Kim
Department of Chemistry, Kyung Hee University , Seoul 130-701, Korea.
Noh Soo
NS
Han
Department of Chemistry, Korea University , Jochiwon 339-700, Korea.
Dong Myung
DM
Jang
Department of Chemistry, Kyung Hee University , Seoul 130-701, Korea.
Seonghyun
S
Jeong
Department of Chemistry, Korea University , Jochiwon 339-700, Korea.
Jeunghee
J
Park
Department of Chemistry, Kyung Hee University , Seoul 130-701, Korea.
Jae Kyu
JK
Song