http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Oh Kim, Jun,Ku, Zahyun,Krishna, Sanjay,Kang, Sang-Woo,Jun Lee, Sang,Chul Jun, Young,Urbas, Augustine American Institute of Physics 2014 Journal of Applied Physics Vol.115 No.16
<P>We propose and analyze a novel detector structure for pixel-level multispectral infrared imaging. More specifically, we investigate the device performance of a grating-integrated quantum dots-in-a-well photodetector under backside illumination. Our design uses 1-dimensional grating patterns fabricated directly on a semiconductor contact layer and, thus, adds a minimal amount of additional effort to conventional detector fabrication flows. We show that we can gain wide-range control of spectral response as well as large overall detection enhancement by adjusting grating parameters. For small grating periods, the spectral responsivity gradually changes with parameters. We explain this spectral tuning using the Fabry-Perot resonance and effective medium theory. For larger grating periods, the responsivity spectra get complicated due to increased diffraction into the active region, but we find that we can obtain large enhancement of the overall detector performance. In our design, the spectral tuning range can be larger than 1 mu m, and, compared to the unpatterned detector, the detection enhancement can be greater than 92% and 148% for parallel and perpendicular polarizations. Our work can pave the way for practical, easy-to-fabricate detectors, which are highly useful for many infrared imaging applications. (C) 2014 AIP Publishing LLC.</P>
Low temperature metal organic chemical vapor deposition grown MoS₂ nanoflowers
Jaese Park,Jun Oh Kim,Jun Oh Kim,Jihun Mun,Zahyun Ku,Sang-Woo Kang 한국진공학회 2021 한국진공학회 학술발표회초록집 Vol.2021 No.2
MoS<sub>2</sub> NFs have received considerable attention due to their inherently distinctive structure and extraordinary properties<sup>1</sup>. We report a simple MOCVD method that can grow high crystal quality MoS<sub>2</sub> NFs through controlling the partial pressure ratio (P<sub>SR</sub>/P<sub>MoP</sub>) of the H<sub>2</sub>S gas to the No(CO)<sub>6</sub> precursor. We investigate microscopically and spectroscopically that the fundamental properties of the grown MoS<sub>2</sub> NFs can be controlled by adjusting the PSR/PMoP from 1.15 to 1.9. It is also shown that the LT-MOCVD can regulate the petal size of MoS<sub>2</sub> NFs through the growth time, thereby controlling PL intensity.
Kim, Bongjoong,Jeon, Jiyeon,Zhang, Yue,Wie, Dae Seung,Hwang, Jehwan,Lee, Sang Jun,Walker, Dennis E.,Abeysinghe, Don C.,Urbas, Augustine,Xu, Baoxing,Ku, Zahyun,Lee, Chi Hwan American Chemical Society 2019 Nano letters Vol.19 No.8
<P>Guided manipulation of light through periodic nanoarrays of three-dimensional (3D) metal-dielectric patterns provides remarkable opportunities to harness light in a way that cannot be obtained with conventional optics yet its practical implementation remains hindered by a lack of effective methodology. Here we report a novel 3D nanoassembly method that enables deterministic integration of quasi-3D plasmonic nanoarrays with a foreign substrate composed of arbitrary materials and structures. This method is versatile to arrange a variety of types of metal-dielectric composite nanoarrays in lateral and vertical configurations, providing a route to generate heterogeneous material compositions, complex device layouts, and tailored functionalities. Experimental, computational, and theoretical studies reveal the essential design features of this approach and, taken together with implementation of automated equipment, provide a technical guidance for large-scale manufacturability. Pilot assembly of specifically engineered quasi-3D plasmonic nanoarrays with a model hybrid pixel detector for deterministic enhancement of the detection performances demonstrates the utility of this method.</P> [FIG OMISSION]</BR>