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  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper EI_4_3

Time-Resolved Stark Spectroscopy in CdSe Nanoplatelets: A route to field controlled emitters

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Abstract

We study [1] the application potential of CdSe nanoplatelets (NPLs) [2], a model system for colloidal 2D materials, as field-controlled emitters and their properties. We show that their luminescence emission can be modulated by 28% upon application of electrical fields up to 175 kV/cm. This is a very high modulation depth for field-controlled nanoemitters. Based on our experimental results we estimate the exciton binding energy in 5.5 monolayer CdSe nanoplatelets to be EB = 170 meV. Therefore CdSe NPLs exhibit highly robust excitons being stable even at room temperature. This allows to tune the emission and recombination dynamics efficiently by external electric fields.

© 2017 IEEE

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