Plasmon Nanocavity Array Lasers: Cooperating over Losses and Competing for Gain

Area of Science:

• Photonics and Nanotechnology
• Plasmonics
• Laser Physics

Background:

• Plasmon nanocavity array lasers utilize localized surface plasmons and collective diffractive effects.
• Surface lattice resonances hybridize plasmon antennas, reducing ohmic and radiative losses.
• Lasing modes compete for gain within confined unit cells, exhibiting structured fields and population inversion.

Purpose of the Study:

• To review the current understanding of plasmon nanocavity array lasers.
• To explore methods for manipulating the balance between loss and gain.
• To advance the development of low-threshold, high-performance plasmon lasers.

Main Methods:

• Analysis of electromagnetic field enhancement at localized particle plasmons.
• Investigation of collective diffractive effects in periodic lattice geometries.
• Study of surface lattice resonances and their role in loss reduction.
• Examination of gain optimization strategies in confined laser modes.

Main Results:

• Demonstration of low-threshold lasing with excellent coherence, line width, and directivity.
• Identification of mechanisms for reducing losses through antenna hybridization.
• Understanding of mode competition and field structuring within unit cells.
• Insights into manipulating the gain-loss balance for improved laser characteristics.

Conclusions:

• Plasmon nanocavity array lasers offer a promising platform for high-performance laser applications.
• Further research into loss reduction and gain optimization is crucial for advancing the technology.
• This approach holds potential for developing novel photonic devices and systems.