Waveguide coupled cavity-enhanced light emission from individual carbon nanotubes

D Yamashita,H Machiya,Y K Kato,K Otsuka,A Ishii

doi:10.1063/5.0042635

D Yamashita, H Machiya + Show 3 more

Open Access

https://doi.org/10.1063/5.0042635

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Abstract

We demonstrate an individual single-walled carbon nanotube light emitter integrated onto a microcavity and a waveguide operating in the telecom wavelength regime. Light emission from the carbon nanotube is enhanced at the cavity resonance and is efficiently extracted from the waveguide facet. We have transferred carbon nanotubes to a nanobeam cavity with a dry process, ensuring that an individual carbon nanotube is used. The guided light emission from a chirality-identified single carbon nanotube has a narrow linewidth of less than 1.3 nm and an off-resonance rejection of ∼17 dB. The waveguide-coupled device configuration is compatible with fully integrated on-chip designs and is promising for carbon-nanotube-based photonics.

Highlights

In this work, individual carbon nanotubes (CNTs) telecom-wavelength emitters are integrated onto a microcavity and a waveguide
Using finitedifference time-domain (FDTD) simulations,30 we have modified an air-mode photonic crystals (PCs) nanobeam cavity used in Ref. 15 to have one thin end mirror for guiding the light into the waveguide
We scitation.org/journal/app characterize the devices using two geometries: a top detection configuration that measures light emission from CNTs on a nanobeam cavity and a side detection configuration that collects light emission coupled to the waveguide

Summary

Introduction

Individual CNT telecom-wavelength emitters are integrated onto a microcavity and a waveguide. Such waveguidecoupled and cavity-enhanced light emission from CNT devices has been demonstrated using one- and two-dimensional photonic crystals (PCs)18,19 as well as micro-ring and micro-disk16,23,25 cavities. We scitation.org/journal/app characterize the devices using two geometries: a top detection configuration that measures light emission from CNTs on a nanobeam cavity and a side detection configuration that collects light emission coupled to the waveguide.

Results

Conclusion