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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Solar-blind-ultraviolet extraordinary transmission for ultrasensitive photoconductive detector based on plasmonic subwavelength interdigital electrodes
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Solar-blind-ultraviolet extraordinary transmission for ultrasensitive photoconductive detector based on plasmonic subwavelength interdigital electrodes

机译：基于等离子体亚主波长斜台电极的超敏感光电导探测器的太阳盲 - 紫外线变速器

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摘要

The solar-blind-ultraviolet (SBUV) detection industry demands high sensitivity as well as easy processability for its semiconductor devices. Photoconductive detectors have the simplest structure. However, the electrodes covering the illuminated side cause optical shielding losses, resulting in a relatively low sensitivity of such devices. Through finite-difference time-domain (FDTD) simulation, we demonstrated that surface-plasmon-based enhanced SBUV transmission is achievable for Al interdigital electrodes (IDEs) with a period <= 200 nm and an interval >= 140 nm. Under this parameter setting, a larger interval and smaller period leads to further enhancement of SBUV transmission. Particularly, we have found that different possible dielectric environments, such as Ni insertion, Al oxidization, and MgF2 anti-oxidation, would not exert fatal effects on this enhancement. Besides, such an enhancement is maintained under the angle of incidence within 10 degrees, which is large enough for practical SBUV detection. Our research reveals the feasibility of high sensitivity by a simple photoconductive device, showing profound significance for an applicable SBUV detector.
机译：太阳盲 - 紫外线（SBUV）检测行业需要高灵敏度以及其半导体器件的简单可加工性。光电导探测器具有最简单的结构。然而，覆盖照明侧的电极导致光学屏蔽损耗，从而导致这种装置的相对低的灵敏度。通过有限差分时域（FDTD）模拟，我们证明了基于表面等离子体的增强的SBUV传输可用于al interdition电极（IDE），周期<= 200nm和间隔> = 140nm。在该参数设置下，更大的间隔和更小的时段导致进一步增强SBUV传输。特别地，我们已经发现，不同可能的介电环境，例如Ni插入，Al氧化和MGF2抗氧化，对这种增强产生致命作用。此外，这种增强在10度内的入射角下保持，这足够大以进行实际S​​BUV检测。我们的研究揭示了一种简单的光电导装置的高灵敏度的可行性，对适用的SBUV检测器表示了深刻的意义。

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