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Hybrid photon-plasmon nanowire lasers
Xiaoqin Wu1, Yao Xiao, Chao Meng
1State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University , Hangzhou 310027, China.
Nano Letters
|October 23, 2013
Summary
Researchers developed a novel nanowire laser with spatially separated plasmon modes. This breakthrough enables efficient coupling for single-photon emitters and ultrasensitive optical sensing applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Metallic and plasmonic nanolasers are of increasing interest.
- Current designs operate in hybrid modes, preventing separation of photonic and plasmonic components.
- Spatially separated plasmon modes are crucial for applications like single-photon emitter coupling and optical sensing.
Purpose of the Study:
- To demonstrate a nanowire laser with subdiffraction-limited beam size.
- To achieve spatially separated plasmon cavity modes.
- To enable simultaneous photonic far-field output and localized coherent plasmon modes.
Main Methods:
- Near-field coupling of a high-gain Cadmium Selenide (CdSe) nanowire (NW) and a 100 nm diameter Silver (Ag) NW.
- Operation at room temperature.
- Characterization of hybrid photon-plasmon laser at 723 nm wavelength.
Main Results:
- Demonstration of a hybrid photon-plasmon laser.
- Achieved a plasmon mode area of 0.008λ(2).
- Simultaneous spatially separated photonic far-field output and highly localized coherent plasmon modes.
Conclusions:
- The developed nanowire laser offers a unique solution for separating photonic and plasmonic functionalities.
- This technology holds promise for integrated nanophotonic circuits, biosensing, and quantum information processing.
- Opens new avenues for advanced optical applications requiring precise control of light-matter interactions.
