Fabrication of cadmium selenide quantum dots with laser ablation in superfluid helium

Yosuke Minowa; Tatsuro Suzuki; Kenji Setoura; Syoji Ito; Hiroshi Miyasaka; Masaaki Ashida

doi:10.1117/12.2319016

24 April 2018 Fabrication of cadmium selenide quantum dots with laser ablation in superfluid helium

Yosuke Minowa, Tatsuro Suzuki, Kenji Setoura, Syoji Ito, Hiroshi Miyasaka, Masaaki Ashida

Proceedings Volume 10712, Optical Manipulation Conference; 107120N (2018) https://doi.org/10.1117/12.2319016
Event: SPIE Structured Light, 2018, Yokohama, Japan

Abstract

We fabricated semiconductor cadmium selenide (CdSe) quantum dots via the pulsed laser ablation in the superfluid helium. The fabricated quantum dots showed blue-shifted fluorescence due to the strong quantum confinement effect. The fluorescence blinking phenomena were also observed indicating the single photon emission process. Our proposed scheme is a simple, robust, and reliable method to fabricate quantum dots and to introduce the highly fluorescence nanoparticles into superfluid helium appropriate for resonant optical manipulation and nano-tracers for liquid helium visualization.

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Yosuke Minowa, Tatsuro Suzuki, Kenji Setoura, Syoji Ito, Hiroshi Miyasaka, and Masaaki Ashida "Fabrication of cadmium selenide quantum dots with laser ablation in superfluid helium", Proc. SPIE 10712, Optical Manipulation Conference, 107120N (24 April 2018); https://doi.org/10.1117/12.2319016

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KEYWORDS

Helium

Quantum dots

Laser ablation

Particles

Luminescence

Cadmium

Optical manipulation

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