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Mid-Infrared Intersubband Cavity Polaritons in Flexible Single Quantum Well
Puspita Paul1, Sadhvikas J Addamane2, Peter Qiang Liu1
1Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States.
Nano Letters
|March 31, 2023
Summary
Researchers achieved ultrastrong coupling in a single quantum well and photonic nanocavity at room temperature. This breakthrough enables flexible, wearable photonics applications.
Area of Science:
- Quantum optics
- Nanophotonics
- Condensed matter physics
Background:
- Strong and ultrastrong coupling between quantum wells and cavity photons are typically achieved using numerous quantum wells on rigid substrates.
- Previous research has focused on mid-infrared and terahertz spectral regions.
Purpose of the Study:
- To experimentally demonstrate ultrastrong coupling in a single quantum well and a photonic nanocavity at room temperature.
- To explore strong coupling with second-order intersubband transitions.
- To implement these systems on flexible substrates for novel applications.
Main Methods:
- Utilized a single quantum well and a resonant photonic nanocavity.
- Operated the system at room temperature.
- Fabricated devices on soft and flexible substrates.
Main Results:
- Achieved ultrastrong coupling between the intersubband transition of a single quantum well and the nanocavity resonance.
- Observed strong coupling with the second-order intersubband transition.
- Demonstrated that substrate flexibility does not significantly impact cavity polariton characteristics.
Conclusions:
- This work establishes a new paradigm for achieving strong and ultrastrong coupling with reduced material requirements.
- The development of flexible intersubband cavity polariton systems opens avenues for soft and wearable photonics.
- The findings have implications for future optoelectronic devices and quantum information technologies.
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