Polarization-Sensitive Photoluminescence from Aligned Carbon Chains Terminated by Gold Clusters.

Area of Science:

• Materials Science
• Nanotechnology
• Quantum Optics

Background:

• Carbyne, a one-dimensional carbon allotrope, presents unique electronic and optical properties.
• Controlling carbyne chain length and alignment is crucial for harnessing its potential.
• Gold nanoparticles are known to influence nanomaterial properties through plasmonic and doping effects.

Purpose of the Study:

• To synthesize and characterize a thin film of gold-cluster-terminated carbyne chains.
• To investigate the impact of gold clusters on carbyne chain stability, alignment, and optical properties.
• To explore the potential of these materials for advanced optical and quantum photonic applications.

Main Methods:

• Thin film synthesis of carbyne chains functionalized with gold clusters.
• Optical spectroscopy techniques to study photoluminescence and light absorption.
• Plasmon resonance excitation to probe material responses.

Main Results:

• Gold clusters stabilize longer carbyne chains and induce their alignment.
• Electron doping by gold clusters shifts photoluminescence dependence from quadratic to linear.
• Excitation at gold plasmon frequency causes photoluminescence blue shift, enabling carbyne length estimation.
• Aligned chains exhibit anisotropic light absorption with cosine angular dependence.

Conclusions:

• Gold-terminated carbyne chains offer a route to stable, aligned structures with tunable optical properties.
• The material demonstrates potential as an efficient, polarization-sensitive light emitter.
• This work opens avenues for developing new components for integrated quantum photonics.