Broadband Terahertz Computed Tomography Using a 5k-pixel Real-time THz Camera

Georgios Trichopoulos, Kubilay Sertel

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We present a novel THz computed tomography system that enables fast 3-dimensional imaging and spectroscopy in the 0.6-1.2 THz band. The system is based on a new real-time broadband THz camera that enables rapid acquisition of multiple cross-sectional images required in computed tomography. Tomographic reconstruction is achieved using digital images from the densely-packed large-format (80×64) focal plane array sensor located behind a hyper-hemispherical silicon lens. Each pixel of the sensor array consists of an 85 μm × 92 μm lithographically fabricated wideband dual-slot antenna, monolithically integrated with an ultra-fast diode tuned to operate in the 0.6-1.2 THz regime. Concurrently, optimum impedance matching was implemented for maximum pixel sensitivity, enabling 5 frames-per-second image acquisition speed. As such, the THz computed tomography system generates diffraction-limited resolution cross-section images as well as the three-dimensional models of various opaque and partially transparent objects. As an example, an over-the-counter vitamin supplement pill is imaged and its material composition is reconstructed. The new THz camera enables, for the first time, a practical application of THz computed tomography for non-destructive evaluation and biomedical imaging.

Original languageEnglish (US)
Pages (from-to)675-686
Number of pages12
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Volume36
Issue number7
DOIs
StatePublished - Jul 5 2015
Externally publishedYes

Fingerprint

Tomography
tomography
Pixels
Cameras
pixels
cameras
broadband
acquisition
Imaging techniques
vitamins
slot antennas
Slot antennas
Focal plane arrays
impedance matching
Image acquisition
Vitamins
sensors
Sensor arrays
supplements
three dimensional models

Keywords

  • Focal plane arrays
  • THz camera
  • THz computed tomography
  • THz imaging

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Radiation

Cite this

Broadband Terahertz Computed Tomography Using a 5k-pixel Real-time THz Camera. / Trichopoulos, Georgios; Sertel, Kubilay.

In: Journal of Infrared, Millimeter, and Terahertz Waves, Vol. 36, No. 7, 05.07.2015, p. 675-686.

Research output: Contribution to journalArticle

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