Single-particle photoluminescence from cadmium selenide quantum dots fabricated via laser ablation in superfluid helium
Journal of Nanophotonics, 2019•spiedigitallibrary.org
We fabricated cadmium selenide nanoparticles using a pulsed laser-ablation scheme in
superfluid helium. The fabricated nanoparticles showed photoluminescence blinking and a
clear blueshifted emission whose linewidth was nearly equal to the homogeneous linewidth.
These results demonstrate that our method can prepare quantum dots with a sharp
resonance directly in superfluid helium, enabling the further implementation of resonant
optical manipulation and optical trapping in cryogenic systems.
superfluid helium. The fabricated nanoparticles showed photoluminescence blinking and a
clear blueshifted emission whose linewidth was nearly equal to the homogeneous linewidth.
These results demonstrate that our method can prepare quantum dots with a sharp
resonance directly in superfluid helium, enabling the further implementation of resonant
optical manipulation and optical trapping in cryogenic systems.
Abstract
We fabricated cadmium selenide nanoparticles using a pulsed laser-ablation scheme in superfluid helium. The fabricated nanoparticles showed photoluminescence blinking and a clear blueshifted emission whose linewidth was nearly equal to the homogeneous linewidth. These results demonstrate that our method can prepare quantum dots with a sharp resonance directly in superfluid helium, enabling the further implementation of resonant optical manipulation and optical trapping in cryogenic systems.
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