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Metallic Nanowire Coupled CsPbBr3 Quantum Dots Plasmonic Nanolaser |
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| Authors: | Di Xing Cheng-Chieh Lin Phillip Won Rong Xiang Tzu-Pei Chen A. Syazwan A. Kamal Yang-Chun Lee Ya-Lun Ho Shigeo Maruyama Seung Hwan Ko Chun-Wei Chen Jean-Jacques Delaunay |
| Affiliation: | 1. School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113–8656 Japan;2. International Graduate Program of Molecular Science and Technology (NTU-MST), Taiwan International Graduate Program, National Taiwan University 3. and Academia Sinica, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617 Taiwan Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617 Taiwan Molecular Science and Technology Program, Taiwan International Graduate Program (TIGP) Academia Sinica, No. 128, Sec. 2, Academia Rd., Taipei, 11529 Taiwan;4. Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826 Korea;5. Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617 Taiwan;6. and Academia Sinica, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617 Taiwan Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617 Taiwan Center of Atomic Initiative for New Materials (AI-MAT), National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617 Taiwan |
| Abstract: | Plasmonic nanolasers provide a valuable opportunity for expanding sub-wavelength applications. Due to the potential of on-chip integration, semiconductor nanowire (NW)-based plasmonic nanolasers that support the waveguide mode attract a high level of interest. To date, perovskite quantum dots (QDs) based plasmonic lasers, especially nanolasers that support plasmonic-waveguide mode, are still a challenge and remain unexplored. Here, metallic NW coupled CsPbBr3 QDs plasmonic-waveguide lasers are reported. By embedding Ag NWs in QDs film, an evolution from amplified spontaneous emission with a full width at half maximum (FWHM) of 6.6 nm to localized surface plasmon resonance (LSPR) supported random lasing is observed. When the pump light is focused on a single Ag NW, a QD-NW coupled plasmonic-waveguide laser with a much narrower emission peak (FWHM = 0.4 nm) is realized on a single Ag NW with the uniform polyvinylpyrrolidone layer. The QDs serve as the gain medium while the Ag NW serves as a resonant cavity and propagating plasmonic lasing modes. Furthermore, by pumping two Ag NWs with different directions, a dual-wavelength lasing switch is realized. The demonstration of metallic NW coupled QDs plasmonic nanolaser would provide an alternative approach for ultrasmall light sources as well as fundamental studies of light matter interactions. |
| Keywords: | Ag nanowires CsPbBr3 quantum dots perovskite plasmonic lasers plasmonic waveguides |