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Room temperature terahertz semiconductor frequency comb

Author

Listed:
  • Quanyong Lu

    (Northwestern University)

  • Feihu Wang

    (Northwestern University)

  • Donghai Wu

    (Northwestern University)

  • Steven Slivken

    (Northwestern University)

  • Manijeh Razeghi

    (Northwestern University)

Abstract

A terahertz (THz) frequency comb capable of high-resolution measurement will significantly advance THz technology application in spectroscopy, metrology and sensing. The recently developed cryogenic-cooled THz quantum cascade laser (QCL) comb has exhibited great potentials with high power and broadband spectrum. Here, we report a room temperature THz harmonic frequency comb in 2.2 to 3.3 THz based on difference-frequency generation from a mid-IR QCL. The THz comb is intracavity generated via down-converting a mid-IR comb with an integrated mid-IR single mode based on distributed-feedback grating without using external optical elements. The grating Bragg wavelength is largely detuned from the gain peak to suppress the grating dispersion and support the comb operation in the high gain spectral range. Multiheterodyne spectroscopy with multiple equally spaced lines by beating it with a reference Fabry-Pérot comb confirms the THz comb operation. This type of THz comb will find applications to room temperature chip-based THz spectroscopy.

Suggested Citation

  • Quanyong Lu & Feihu Wang & Donghai Wu & Steven Slivken & Manijeh Razeghi, 2019. "Room temperature terahertz semiconductor frequency comb," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10395-7
    DOI: 10.1038/s41467-019-10395-7
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    Cited by:

    1. Tomoki Hiraoka & Yuta Inose & Takashi Arikawa & Hiroshi Ito & Koichiro Tanaka, 2022. "Passive mode-locking and terahertz frequency comb generation in resonant-tunneling-diode oscillator," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Wenting Wang & Ping-Keng Lu & Abhinav Kumar Vinod & Deniz Turan & James F. McMillan & Hao Liu & Mingbin Yu & Dim-Lee Kwong & Mona Jarrahi & Chee Wei Wong, 2022. "Coherent terahertz radiation with 2.8-octave tunability through chip-scale photomixed microresonator optical parametric oscillation," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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