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We synthesize a thin film composed of long carbyne chains terminated by goldclusters and study its optical properties. The presence of gold particlesstabilizes longer chains and leads to their alignment. We show that the goldclusters also act as a source of electron doping thus changing the intensity ofphotoluminescence from quadratic dependence on the pumping intensity withoutgold to linear with gold. We also observe that the excitation of the film atthe gold plasmon frequency causes the blue shift of photoluminescence andestimate on the basis of this effect the minimum length of the carbyne chains.The high degree of alignment of the gold-terminated carbyne chains results instrongly anisotropic light absorption characterized by a distinctive cosinedependence on the angle between the carbyne molecule and polarization plane ofthe excitation. This paves the way for a new class of ultimately-thinpolarization sensitive emitters to be used in future integrated quantumphotonics devices.

Polarization-sensitive photoluminescence from aligned carbon chains terminated by gold clusters