Ultralow mode-volume photonic crystal nanobeam cavities for high efficiency coupling to individual carbon nanotube emitters

Abstract

We report on high efficency coupling of individual air-suspended carbon nanotubes to silicon photonic crystal nanobeam cavities. Photoluminescence images of dielectric- and air-mode cavities reflect their distinctly different mode profiles and show that fields in the air are important for coupling. We find that the air-mode cavities couple more efficiently, and estimated spontaneous emission coupling factors reach a value as high as 0.85. Our results demonstrate advantages of ultralow mode-volumes in air-mode cavities for coupling to low-dimensional nanoscale emitters.

4 pages, 4 figures

References in corpus (5)

• Electrically driven thermal light emission from individual single-walled carbon nanotubes
• Exciton diffusion in air-suspended single-walled carbon nanotubes
• Enhancement of carbon nanotube photoluminescence by photonic crystal nanocavities
• Optical microcavity with semiconducting single-wall carbon nanotubes
• Optical control of individual carbon nanotube light emitters by spectral double resonance in silicon microdisk resonators

Cited by in corpus (7)

• Cavity-enhanced single photon source based on the silicon vacancy center in diamond
• Exciton diffusion, end quenching, and exciton-exciton annihilation in individual air-suspended carbon nanotubes
• Room-temperature single photon emission from micron-long air-suspended carbon nanotubes
• Exploiting one-dimensional exciton-phonon coupling for tunable and efficient single-photon generation with a carbon nanotube
• Interband transitions in narrow-gap carbon nanotubes and graphene nanoribbons
• Strong reduction of exciton-phonon coupling in high crystalline quality single-wall carbon nanotubes: a new insight into broadening mechanisms and exciton localization
• Enhanced photothermal cooling of nanowires