Journal ArticleDOI
Single gallium nitride nanowire lasers
Justin C. Johnson,Heon Jin Choi,Heon Jin Choi,Kelly P. Knutsen,Richard D. Schaller,Peidong Yang,Peidong Yang,Richard J. Saykally +7 more
TLDR
A redshift that is strongly dependent on pump power supports the idea that the electron–hole plasma mechanism is primarily responsible for the gain at room temperature and is a considerable advance towards the realization of electron-injected, nanowire-based ultraviolet–blue coherent light sources.Abstract:
There is much current interest in the optical properties of semiconductor nanowires, because the cylindrical geometry and strong two-dimensional confinement of electrons, holes and photons make them particularly attractive as potential building blocks for nanoscale electronics and optoelectronic devices, including lasersand nonlinear optical frequency converters. Gallium nitride (GaN) is a wide-bandgap semiconductor of much practical interest, because it is widely used in electrically pumped ultraviolet-blue light-emitting diodes, lasers and photodetectors. Recent progress in microfabrication techniques has allowed stimulated emission to be observed from a variety of GaN microstructures and films. Here we report the observation of ultraviolet-blue laser action in single monocrystalline GaN nanowires, using both near-field and far-field optical microscopy to characterize the waveguide mode structure and spectral properties of the radiation at room temperature. The optical microscope images reveal radiation patterns that correlate with axial Fabry-Perot modes (Q approximately 10(3)) observed in the laser spectrum, which result from the cylindrical cavity geometry of the monocrystalline nanowires. A redshift that is strongly dependent on pump power (45 meV microJ x cm(-2)) supports the idea that the electron-hole plasma mechanism is primarily responsible for the gain at room temperature. This study is a considerable advance towards the realization of electron-injected, nanowire-based ultraviolet-blue coherent light sources.read more
Citations
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Journal ArticleDOI
Lead halide perovskite nanowire lasers with low lasing thresholds and high quality factors
Haiming Zhu,Yongping Fu,Fei Meng,Xiaoxi Wu,Zizhou Gong,Qi Ding,Martin V. Gustafsson,M. Tuan Trinh,Song Jin,Xiaoyang Zhu +9 more
TL;DR: Lasing performance, coupled with the facile solution growth of single-crystal nanowires and the broad stoichiometry-dependent tunability of emission colour, makes lead halide perovskites ideal materials for the development of nanophotonics, in parallel with the rapid development in photovoltaics from the same materials.
PatentDOI
Plasmon lasers at deep subwavelength scale
TL;DR: Hybrid plasmonic waveguides as discussed by the authors employ a high-gain semiconductor nanostructure functioning as a gain medium that is separated from a metal substrate surface by a nanoscale thickness thick low-index gap.
Journal ArticleDOI
Semiconductor nanowires and nanotubes
TL;DR: In this article, a review highlights the recent advances in the field, using work from this laboratory for illustration, and the understanding of general nanocrystal growth mechanisms serves as the foundation for the rational synthetic control of one-dimensional nanoscale building blocks, novel properties characterization and device fabrication based on nanowire building blocks.
Journal ArticleDOI
Core/multishell nanowire heterostructures as multicolor, high-efficiency light-emitting diodes.
TL;DR: The ability to synthesize rationally III-nitride core/multishell nanowire radial heterostructures opens up significant potential for integrated nanoscale photonic systems, including multicolor lasers.
References
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Journal ArticleDOI
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