Broadband Light Collection Efficiency Enhancement of Carbon Nanotube Excitons Coupled to Metallo-Dielectric Antenna Arrays

Kamran Shayan, Claire Rabut, Xiaoqing Kong, Xiangzhi Li, Yue Luo, Kevin S. Mistry, Jeffrey L. Blackburn, Stephanie S. Lee, Stefan Strauf

Research output: Contribution to journalArticlepeer-review

Abstract

The realization of on-chip quantum networks ideally requires lossless interfaces between photons and solid-state quantum emitters. We propose and demonstrate on-chip arrays of metallo-dielectric antennas (MDA) that are tailored toward efficient and broadband light collection from individual embedded carbon nanotube quantum emitters by trapping air gaps on chip that form cavity modes. Scalable implementation is realized by employing polymer layer dry-transfer techniques that avoid solvent incompatibility issues, as well as a planar design that avoids solid-immersion lenses. Cryogenic measurements demonstrate 7-fold enhanced exciton intensity when compared to emitters located on bare wafers, corresponding to a light collection efficiency (LCE) up to 92% in the best case (average LCE of 69%) into a narrow output cone of ±15° that enables a priori fiber-to-chip butt coupling. The demonstrated MDA arrays are directly compatible with other quantum systems, particularly 2D materials, toward enabling efficient on-chip quantum light sources or spin-photon interfaces requiring unity light collection, both at cryogenic or room temperature.

Original languageEnglish (US)
Pages (from-to)289-294
Number of pages6
JournalACS Photonics
Volume5
Issue number2
DOIs
StatePublished - Feb 21 2018

Keywords

  • carbon nanotubes
  • excitons
  • light collection efficiency
  • metallo-dielectric antenna
  • microcavity
  • quantum emitter

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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