Optical control of individual carbon nanotube light emitters by spectral double resonance in silicon microdisk resonators

Abstract

Single-walled carbon nanotubes have advantages as a nanoscale light source compatible with silicon photonics because they show room-temperature luminescence at telecom-wavelengths and can be directly synthesized on silicon substrates. Here we demonstrate integration of individual light-emitting carbon nanotubes with silicon microdisk resonators. Photons emitted from nanotubes are efficiently coupled to whispering gallery modes, circulating within the disks and lighting up their perimeters. Furthermore, we control such emission by tuning the excitation wavelength in and out of resonance with higher order modes in the same disk. Our results open up the possibilities of using nanotube emitters embedded in photonic circuits that are individually addressable through spectral double resonance.

Waveguide‐Integrated Light‐Emitting Carbon Nanotubes

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An alternative approach is the integration of monolithic nanoscale light emitters with photonic waveguide structures. [ 18,19 ] In these experiments light emission from the nanotube has been stimulated optically by a free-space laser source and coupling of fl uorescent light from nanotubes into photonic structures has been demonstrated. [ 17 ] More recently also carbon nanotubes (CNTs) have been combined with photonic waveguides and cavities.

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“…[ 17 ] More recently also carbon nanotubes (CNTs) have been combined with photonic waveguides and cavities. [ 18,19 ] In these experiments light emission from the nanotube has been stimulated optically by a free-space laser source and coupling of fl uorescent light from nanotubes into photonic structures has been demonstrated. Carbon nanotubes, however, can also be stimulated electrically to emit light, which is the preferred method of excitation for chipscale solutions.…”

Controlling carbon nanotube photoluminescence using silicon microring resonators

“…More recent works took advantages of the Silicon-On-Insulator (SOI) platform to couple s-SWNT PL to suspended photonic crystal cavities [17,18], or silicon microdisk resonators [19]. An advantage of this approach is the integration with silicon photonics technology, even if it remains challenging to efficiently couple these structures with waveguides.…”

Carbon nanotube photonics: using microring resonators for tailoring semiconducting carbon nanotubes photoluminescence

“…The s-SWNT PL was coupled to photonic crystal cavities, 15 and individual s-SWNT PL was also coupled into silicon microdisk resonators, 16 or low mode-volume photonic crystal cavities. 14 Successive works used the siliconon-insulator (SOI) platform, taking advantage of the easier integration with silicon technology.…”