Terahertz Computed Tomorgraphy with a Quantum Cascade Laser and a Quantum-well Photodetector

다국어 초록 (Multilingual Abstract)

In this letter, a terahertz (THz) tomography system based on a quantum cascade laser (QCL)and a quantum-well photodetector (QWP) is demonstrated. The QCL provides a relatively high power (a few microwatts) in a continuous-wave mode at 3.9 THz as a light source, and the QWP provides a narrow response range from 3 to 7 THz with a calibrated peak response of 0.5 A/W under background-limited performance. We employ the widely-used filtered back projection (FBP)and algebraic reconstruction algorithms for terahertz tomography technology. The reconstructed cross-sectional image of a sample has successfully revealed the internal and the external structures with a resolution of around 1.5 mm. This experiment demonstrates that the terahertz QCL and the photodetector are potentially useful for terahertz tomography applications.

참고문헌 (Reference)

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