title: Emission energy, exciton dynamics and lasing properties of buckled CdS nanoribbons.
abstract: We report the modulation of emission energy, exciton dynamics and lasing properties in a single buckled CdS nanoribbon (NR) by strain-engineering. Inspired by ordered structure fabrication on elastomeric polymer, we develop a new method to fabricate uniform buckled NRs supported on polydimethylsiloxane (PDMS). Wavy structure, of which compressive and tensile strain periodically varied along the CdS NR, leads to a position-dependent emission energy shift as large as 14 nm in photoluminescence (PL) mapping. Both micro-PL and micro-reflectance reveal the spectral characteristics of broad emission of buckled NR, which can be understood by the discrepancy of strain-induced energy shift of A- and B-exciton of CdS. Furthermore, the dynamics of excitons under tensile strain are also investigated; we find that the B-exciton have much shorter lifetime than that of redshifted A-exciton. In addition, we also present the lasing of buckled CdS NRs, in which the strain-dominated mode selection in multi-mode laser and negligible mode shifts in single-mode laser are clearly observed. Our results show that the strained NRs may serve as new functional optical elements for flexible light emitter or on-chip all-optical devices.
authors.affiliation: National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China.|Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.affiliation: National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China.
authors.forename: Liaoxin
authors.initials: L
authors.lastname: Sun
authors.affiliation: Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201210, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Lu
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, United States.
authors.forename: Ming-Liang
authors.initials: ML
authors.lastname: Ren
authors.affiliation: National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China.
authors.forename: Tianning
authors.initials: T
authors.lastname: Zhang
authors.affiliation: National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Huang
authors.affiliation: National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China.
authors.forename: Xiaohao
authors.initials: X
authors.lastname: Zhou
authors.affiliation: National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Sun
authors.affiliation: National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Changqing
authors.initials: C
authors.lastname: Chen
authors.affiliation: National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China.
authors.forename: Xuechu
authors.initials: X
authors.lastname: Shen
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, United States.
authors.forename: Ritesh
authors.initials: R
authors.lastname: Agarwal
authors.affiliation: National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Lu
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D049449:Luminescence; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D037742:Nanotubes, Carbon; D013440:Sulfides; C034939:cadmium sulfide