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Terahertz imaging system with resonant tunneling diodes

机译:具有谐振隧穿二极管的太赫兹成像系统

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We report a feasibility study of a terahertz imaging system with resonant tunneling diodes (RTDs) that oscillate at 0.30 THz. A pair of RTDs acted as an emitter and a detector in the system. Terahertz reflection images of opaque samples were acquired with our RTD imaging system. A spatial resolution of 1 mm, which is equal to the wavelength of the RTD emitter, was achieved. The signal-to-noise ratio (SNR) of the reflection image was improved by 6 dB by using polarization optics that reduced interference effects. Additionally, the coherence of the RTD enabled a depth resolution of less than 3 mu m to be achieved by an interferometric technique. Thus, RTDs are an attractive candidate for use in small THz imaging systems. (C) 2016 The Japan Society of Applied Physics
机译:我们报告了在0.30 THz振荡的共振隧穿二极管(RTD)的太赫兹成像系统的可行性研究。一对RTD充当系统中的发射器和检测器。不透明样品的太赫兹反射图像是通过我们的RTD成像系统获得的。达到了1 mm的空间分辨率,该分辨率等于RTD发射器的波长。通过使用减少干涉效应的偏振光学元件,反射图像的信噪比(SNR)提高了6 dB。另外,RTD的相干性使得通过干涉技术可以获得小于3微米的深度分辨率。因此,RTD是用于小型THz成像系统的诱人候选物。 (C)2016年日本应用物理学会

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