Room Temperature Lasing from Semiconducting Single-Walled Carbon Nanotubes

Jia Shiang Chen, Anushka Dasgupta, Darien J. Morrow, Ruggero Emmanuele, Tobin J. Marks, Mark C. Hersam, Xuedan Ma*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Miniaturized near-infrared semiconductor lasers that are able to generate coherent light with low energy consumption have widespread applications in fields such as optical interconnects, neuromorphic computing, and deep-tissue optogenetics. With optical transitions at near-infrared wavelengths, diameter-tunable electronic structures, and superlative optoelectronic properties, semiconducting single-walled carbon nanotubes (SWCNTs) are promising candidates for nanolaser applications. However, despite significant efforts in this direction and recent progress toward enhancing spontaneous emission from SWCNTs through Purcell effects, SWCNT-based excitonic lasers have not yet been demonstrated. Leveraging an optimized cavity-emitter integration scheme enabled by a self-assembly process, here we couple SWCNT emission to the whispering gallery modes supported by polymer microspheres, resulting in room temperature excitonic lasing with an average lasing threshold of 4.5 kW/cm2. The high photostability of SWCNTs allows stable lasing for prolonged duration with minimal degradation. This experimental realization of excitonic lasing from SWCNTs, combined with their versatile electronic and optical properties that can be further controlled by chemical modification, offers far-reaching opportunities for tunable near-infrared nanolasers that are applicable for optical signal processing, in vivo biosensing, and optoelectronic devices.

Original languageEnglish (US)
Pages (from-to)16776-16783
Number of pages8
JournalACS nano
Issue number10
StatePublished - Oct 25 2022


  • lasing
  • microcavity
  • single-walled carbon nanotubes
  • spquantum defects
  • whispering gallery mode

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy
  • General Materials Science


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