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Strong Coupling in Semiconductor Hyperbolic Metamaterials.
Patrick Sohr1, Dongxia Wei1, Zhengtianye Wang1
1Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19702, United States.
Nano Letters
|November 17, 2021
Summary
Researchers achieved strong coupling between volume plasmon polariton (VPP) modes in semiconductor hyperbolic metamaterials (HMMs) and quantum well intersubband transitions. This opens doors for advanced infrared optoelectronic devices.
Area of Science:
- Optoelectronics
- Materials Science
- Quantum Optics
Background:
- Semiconductor hyperbolic metamaterials (HMMs) support high-wavevector volume plasmon polariton (VPP) modes in the infrared spectrum.
- VPP modes have been utilized in the weak-coupling regime via the enhanced Purcell effect.
Purpose of the Study:
- To experimentally demonstrate strong coupling between VPP modes in semiconductor HMMs and quantum well intersubband transitions.
- To explore the potential for novel infrared optoelectronic devices.
Main Methods:
- Fabrication of semiconductor-based layered hyperbolic metamaterials (HMMs).
- Integration of epitaxially embedded quantum wells within the HMM structure.
- Spectroscopic analysis to observe coupling phenomena and dispersion curves.
Main Results:
- Clear anticrossings observed in the dispersion curves for multiple orders (zeroth to third) of VPP modes.
- Formation of upper and lower polariton branches for each VPP mode due to strong coupling.
- Experimental validation of strong light-matter interaction in the HMM-quantum well system.
Conclusions:
- The study successfully demonstrates strong coupling between VPP modes and quantum well intersubband transitions.
- This achievement paves the way for developing advanced infrared optoelectronic structures.
- The findings enable the integration of HMMs with embedded epitaxial emitter or detector functionalities.
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