Related Experiment Video
Updated: May 21, 2025
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
6.7K
High-Chirality Polariton Lasing from Symmetry-Broken Plasmonic Lattices
Chuchuan Hong1, Zhaoyun Zheng1, Shreya K Patel1
1Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.
ACS Nano
|May 7, 2025
Summary
Researchers achieved highly chiral polariton lasing using plasmonic cavities and CdSe nanoplatelets. This breakthrough offers energy-efficient, circularly polarized light with high chiral purity at room temperature.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Optics
Background:
- Chiral polariton lasing generates circularly polarized, energy-efficient coherent light.
- Challenges include low circular dichroism of gain materials and broken cavity symmetry, affecting purity and resonance quality at room temperature.
Purpose of the Study:
- To overcome limitations in achieving high optical contrast and chiral purity in polariton lasing.
- To develop a room-temperature chiral polariton lasing system with low thresholds and high chiral purity.
Main Methods:
- Utilized plasmonic nanoparticle lattice cavities with mismatched dimer unit cells.
- Achieved strong coupling between these cavities and Cadmium Selenide (CdSe) nanoplatelets.
Main Results:
- Demonstrated polariton lasing with a low threshold fluence of 8 μJ/cm².
- Achieved high chiral purity of approximately 0.92, approaching the theoretical maximum.
- Observed a lasing threshold at least two times lower than existing room-temperature systems.
Conclusions:
- Plasmonic nanoparticle lattice cavities enable efficient room-temperature chiral polariton lasing.
- The developed system exhibits promising characteristics for spintronics, optoelectronics, and quantum information processing.
Related Concept Videos
02:25Chirality
22.7K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
22.7K
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
5.7K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.7K
02:30Chirality in Nature
12.5K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
12.5K