Low‐Threshold Multiwavelength Plasmonic Nanolasing in an “H”‐Shape Cavity

Author:

Li Chenyang1,Zhang Xutao12,Yi Ruixuan1,Li Ziyuan34,Zhang Fanlu3,Liu Kaihui5,Gan Xuetao1,Fu Lan36,Xiao Fajun1ORCID,Zhao Jianlin1,Tan Hark Hoe36,Jagadish Chennupati36

Affiliation:

1. Key Laboratory of Light‐Field Manipulation and Information Acquisition Ministry of Industry and Information Technology and Shaanxi Key Laboratory of Optical Information Technology School of Physical Science and Technology Northwestern Polytechnical University Xi'an 710129 China

2. Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering Northwestern Polytechnical University 127 West Youyi Road Xi'an 710072 China

3. Department of Electronic Materials Engineering Research School of Physics The Australian National University Canberra Australian Capital Territory 2600 Australia

4. MoE Key Lab of Photoelectronic Imaging Technology and System School of Optics and Photonics Beijing Institute of Technology Beijing 100081 China

5. State Key Laboratory for Mesoscopic Physics Collaborative Innovation Centre of Quantum Matter Frontiers Science Center for Nanooptoelectronics School of Physics Peking University Beijing 100871 China

6. ARC Centre of Excellence for Transformative Meta‐Optical Systems Research School of Physics The Australian National University Canberra Australian Capital Territory 2600 Australia

Abstract

AbstractMultiwavelength plasmonic nanolasers are central to the quest for ultradense and versatile photonic integrations. However, the insufficient optical feedback and mode selection strategies result in a high lasing threshold and multi‐mode operation with limited spectral purity and stability. Here, a multiwavelength near‐infrared plasmonic nanolaser with high mode purity by leveraging a nontrivial “H”‐shape plasmonic cavity is demonstrated. The nanolaser is constructed by inserting InGaAs/GaAs multi‐quantum‐disk (MQD) nanowires into a metallic Fabry‐Perot cavity consisting of a pair of Ag nanowires positioned on an ultrasmooth Au film. The design is endowed with strong optical feedback to enhance the energy transfer between the exciton and plasmon, rendering a significant reduction of the lasing threshold. More importantly, the “H”‐shape cavity is featured with a large flexibility in tuning the resonance wavelength, where multiwavelength lasing with the virtues of single‐mode is realized at room temperature. The results make a crucial step toward near‐infrared multiwavelength plasmonic nanolasers and open up exciting opportunities for applications such as ultracompact photonic integrated circuits and high‐throughput biochemical sensing.

Funder

Fundamental Research Funds for the Central Universities

Publisher

Wiley

Subject

Condensed Matter Physics,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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