Recent progress of room temperature THz sources based on nonlinear frequency mixing in quantum cascade lasers

Manijeh Razeghi, Quanyong Lu, N. Bandyopadhyay, Steven Boyd Slivken, Y. Bai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We present the recent development of high performance compact THz sources based on intracavity nonlinear frequency mixing in mid-infrared quantum cascade lasers. Significant performance improvements of our THz sources in the spectral purity, frequency coverage as well as THz power are achieved by systematic optimizing the device's active region, waveguide, phase matching scheme, and chip bonding strategy. Room temperature single-mode operation in a wide THz spectral range of 1-4.6 THz is demonstrated from our Čerenkov phase-matched THz sources with dual-period DFB gratings. High THz power up to 215 μW at 3.5 THz is demonstrated via epi-down mounting of our THz device. The THz power is later scaled up to mW level by increased the mid-IR power and conversion efficiency. The rapid development renders this type of THz sources promising local oscillators for many astronomical and medical applications.

Original languageEnglish (US)
Title of host publicationImage Sensing Technologies
Subtitle of host publicationMaterials, Devices, Systems, and Applications
PublisherSPIE
Volume9100
ISBN (Print)9781628410372
DOIs
StatePublished - Jan 1 2014
EventImage Sensing Technologies: Materials, Devices, Systems, and Applications - Baltimore, MD, United States
Duration: May 7 2014May 8 2014

Other

OtherImage Sensing Technologies: Materials, Devices, Systems, and Applications
CountryUnited States
CityBaltimore, MD
Period5/7/145/8/14

Keywords

  • difference frequency generation
  • distributed feedback
  • quantum cascade lasers
  • terahertz

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Recent progress of room temperature THz sources based on nonlinear frequency mixing in quantum cascade lasers'. Together they form a unique fingerprint.

Cite this