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

Elena Durán-Valdeiglesias (1) , Weiwei Zhang (1) , Carlos Alonso-Ramos (1) , Samuel Serna (1) , Xavier Le Roux (1) , Delphine Marris-Morini (1) , Marta Reig (2) , Niccolò Casselli (3) , Francesco Biccari (3) , Massimo Gurioli (3) , Arianna Filoramo (2) , Eric Cassan (1) , Laurent Vivien (1)

1 C2N - Centre de Nanosciences et de Nanotechnologies [Orsay]
2 LICSEN UMR 3685 - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
3 LENS - European Laboratory for Non-Linear Spectroscopy

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.

Mots clés: carbon nanotubes; hybrid silicon photonics; photoluminescence

Domaines: Matériaux

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⟩