Materials Literature
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Nanotechnology has been developed broadly since the discovery of carbon nanotubes and graphene. Comparing with vast publication and applications, however, nanotube antennas are still in its infancy stage and unexplored. In this paper, we report nanotube-based antennas for portable device communication and RF/AC perfor…
A Near-Infrared (NIR) embedded metamaterial (MTM) structure is proposed in this study. The computational design process of the complex material and the results of that process are covered and discussed. According to the simulations, periodically engineered silver resonators that are combined with SiO2give good transmi…
A printed circuit board (PCB) based electrically tunable absorber (ETA) providing good absorption rate at much higher frequencies than conventional ones is proposed. In conventional ETAs, the highest absorption frequency is mainly limited by very large capacitance of commercial varactors. In order to overcome the high…
Electrochemical deposition of nanostructured films of zinc sulfide with the addition of copper (ZnS:Cu) has been developed. This article discusses the surface morphology, structure, and phase composition of the films deposited on glass and sitall substrates with In 2 O 3 , a tunnel transparent layer. The spectral dist…
에폭시/은 나노와이어(AgNW) 나노복합재료는 전기 절연성 에폭시에 높은 형상비의 AgNW를 첨가하여 전도성을 부여한 재료이다. 하지만, AgNW 간의 van der Waals 인력에 의한 응집은 나노복합재료의 물성 향상에 장애요인이 되고 있다. 실리카 나노입자(SNP)는 금속 나노필러와 친화력이 우수하여 응집을 방지하고 분산에 도움을 주는 물질로 알려져 있다. 본 연구에서는 에폭시/AgNW 나노복합재료의 분산성 및 전기적 물성에 SNP가 미치는 영향에 대해 고찰하였다. AgNW 함량 3 vol%인 나노복합재료에 있어서 SNP를 첨가하지 않은 경우 전기 전도도가 향…
The purpose of this work is to investigate the optical properties of polycrystalline silicon layers by means of spectroscopic Ellipsometry and other techniques to sustain the analysis (SEM, AFM and Hall effect).The studied MOS structures are composed of c-Si substrate(p-type, Cz<100> oriented), silicon oxide layer (10…
The original heating load line analysis of ORNL TM-2015/281 was modified to incorporate two adjustments of (1) removing mechanical ventilation and (2) resizing the heat pump units based on new criteria. This resulted in a lowering of the HLL slope factor from the originally rounded 1.3 level to 1.15 in DOE Region IV a…
In this paper, the characteristics of the set time (tset) correlated with the initial off-state resistance (Roff) were studied using a statistical method based on a Ti/ZrO2/Pt RRAM device. The data were collected by the width-adjusting pulse operation (WAPO) method. The Weibull distribution is used to analyze tsetvari…
In this paper, PVC method with high energy incident beam was adopted to locate gate oxide defect, instead of conventional low-energy PVC which has low efficiency and accuracy when the poly gate has large size. Under high-energy condition, the potential difference is obvious and the defect can be easily found.
Usual Failure Analysis steps may not guarantee the root cause for all failure mechanism type. It is inevitable that the failure may recover after decapsulation or backside grinding for some failure mechanism. The paper aims to discuss analysis approach used in resolving tilted die failure mechanism issue resulting to…
This work presents plasmonic nanostructures on a large area for visible color filtering. The plasmonic nanostructures comprise alternate layers of silver nanoholes, ultrathin dielectric film, and silver nanoislands on a glass substrate. The plasmonic nanostructures were fabricated on a wafer level by using lithography…
The austenitic stainless steel AISI 316 L(N) IG is used as structural material for the main ITER in-vessel components. When neutron fluences increase, as in DEMO in-vessel components, it is not possible to use AISI 316, which is subject to strong activation due to its high nickel content. Ferritic/martensitic steels w…
Metamaterials operating in terahertz (THz) region is an attractive platform for the detection of micro-sized particles. However, only certain location in the metamaterial pattern offers maximum sensitivity. In this work, microfluidic structure was integrated with THz metamaterial in order to precisely handle the posit…
We propose and demonstrate a physically intuitive formulation of Simplified Modal Method (SMM) that can be applied for the analysis of diffracting and subwavelength gratings of non-rectangular shapes at arbitrary angles of incidence.
The performance of Alvarez lenses is sensitive to the misalignment of lens elements. To improve the alignment accuracy and hence the lens performance, a feasible active alignment mechanism is proposed in this paper. Four micro lenses are created on the corners of the lens elements, forming two afocal lens pairs when t…
Classical analogue of electromagnetically induced transparency mediated by near field coupling in meta-atom resonators form the basis for design of slow light metamaterial devices. Here, we experimentally demonstrate the active control of individual resonators in the near-field coupled system. This allows for active m…
Electromagnetic metamaterials (MMs) consisting of highly conducting sub-wavelength metallic resonators enable many unusual electromagnetic properties at user defined frequencies which are not permissible with the naturally occurring materials [1, 2]. Generally the electromagnetic properties of metamaterials are contro…
The theory of non-local quantum permittivity in metals is introduced and the application of this theory in the propagation of light and its interaction with small metallic nanoparticles (i.e., less than 10 nm in diameter) is investigated.
This work demonstrates angle-sensitive plasmonic filters using complementary plasmonic structures of nanohole and nanodisk arrays. The band-stop characteristics of nanodisk arrays is used to attenuate the redundant plasmon resonances of nanohole arrays. The attenuation of second order resonances and angular sensitivit…
Toroidal multipoles, which along with the familiar electric and magnetic multipoles is necessary for the complete multipole representation of an arbitrary radiating source. We have designed a planar metasurface with resonant response in the terahertz range, which is easy to fabricate and exhibits the signature of a to…