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Shaping the optical properties of carbon nanotubes via chirality- selective resonant enhancement in silicon micro-ring resonators

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Abstract

Semiconducting single walled carbon nanotubes (s-SWNT) have an immense potential for the development of light sources in the silicon photonics platform. However, two major challenges still need to be addressed: the limited interaction between s-SWNTs and Si waveguides and the single-chirality selection. Silicon micro-ring resonators may overcome the first limitation by exploiting resonant light recirculation. Here, we demonstrate that Si ring resonators can also provide SWNT chirality-selective photoluminescence resonance enhancement, releasing a new degree of freedom to shape the optical properties of s-SWNT. Specifically, we experimentally show selective emission enhancement of either (8,6) or (8,7) SWNT chiralities present in a high-purity polymer-sorted s-SWNT solution by judicious micro-ring geometry design. In addition, we harness the large index contrast of the Si platform to experimentally demonstrate that, opposite to the common knowledge, transverse-magnetic (TM) optical modes can efficiently interact with drop-casted s-SWNTs arranged along the chip surface.
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Dates and versions

cea-02329266 , version 1 (23-10-2019)

Identifiers

  • HAL Id : cea-02329266 , version 1

Cite

Elena Durán-Valdeiglesias, Weiwei Zhang, Carlos Alonso-Ramos, Samuel Serna, Xavier Le Roux, et al.. Shaping the optical properties of carbon nanotubes via chirality- selective resonant enhancement in silicon micro-ring resonators. European Conference on Integrated Optics (ECIO 2019), Apr 2019, Ghent, Belgium. ⟨cea-02329266⟩
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