title: Self-assembled DNA tetrahedral optofluidic lasers with precise and tunable gain control.
abstract: We have applied self-assembled DNA tetrahedral nanostructures for the precise and tunable control of the gain in an optofluidic fluorescence resonance energy transfer (FRET) laser. By adjusting the ratio of the donor and the acceptor attached to the tetrahedral vertices, 3.8 times reduction in the lasing threshold and 28-fold enhancement in the lasing efficiency were demonstrated. This work takes advantage of the self-recognition and self-assembly capabilities of biomolecules with well-defined structures and addressability, enabling nano-engineering of the laser down to the molecular level.
authors.affiliation: Department of Biomedical Engineering, University of Michigan, 1101 Beal Ave., Ann Arbor, MI 48109, United States.
authors.forename: Qiushu
authors.initials: Q
authors.lastname: Chen
authors.forename: Huajie
authors.initials: H
authors.lastname: Liu
authors.forename: Wonsuk
authors.initials: W
authors.lastname: Lee
authors.forename: Yuze
authors.initials: Y
authors.lastname: Sun
authors.forename: Dan
authors.initials: D
authors.lastname: Zhu
authors.forename: Hao
authors.initials: H
authors.lastname: Pei
authors.forename: Chunhai
authors.initials: C
authors.lastname: Fan
authors.forename: Xudong
authors.initials: X
authors.lastname: Fan
mesh_terms: D004247:DNA / Q000737:chemistry*; D031541:Fluorescence Resonance Energy Transfer; D007834:Lasers; D046210:Microfluidic Analytical Techniques / Q000379:methods* / Q000592:standards; D049329:Nanostructures / Q000737:chemistry
chemical_list: D004247:DNA