Eui-Hyeok Yang
Stevens Institute of Technology
PiezoelectricityPolarization (waves)OpticsPhysicsFabricationDeformable mirrorComposite materialNanotechnologyActuatorElectrodeMaterials scienceGrapheneMicroelectromechanical systemsSubstrate (electronics)Chemical engineeringOptoelectronicsCarbon nanotubeSiliconMonolayerNanowire
218Publications
27H-index
2,087Citations
Publications 208
Newest
#1Xiang Hua (Columbia University)
#2Datong Zhang (Columbia University)H-Index: 10
Last. Kenji Watanabe (National Institute for Materials Science)H-Index: 161
view all 14 authors...
Chemical vapor deposition (CVD)-grown flakes of high-quality monolayers of WS2 can be stabilized at elevated temperatures by encapsulation with several layer hexagonal boron nitride (h-BN), but to different degrees in the presence of ambient air, flowing N2, and flowing forming gas (95% N2, 5% H2). The best passivation of WS2 at elevated temperature occurs for h-BN-covered samples with flowing N2 (after heating to 873 K), as judged by optical microscopy and photoluminescence (PL) intensity after...
Source
#2Yuan Gao (UVA: University of Virginia)H-Index: 63
Last. Xian ZhangH-Index: 43
view all 8 authors...
Two-dimensional materials such as graphene and transition metal dichalcogenides (TMDCs) have received extensive research interest and investigations in the past decade. In this research, we used a refined opto-thermal Raman technique to explore the thermal transport properties of one popular TMDC material WSe2, in the single-layer (1L), bilayer (2L), and trilayer (3L) forms. This measurement technique is direct without additional processing to the material, and the absorption coefficient of WSe2...
4 CitationsSource
#1Kyungnam Kang (Stevens Institute of Technology)H-Index: 8
#2Shichen Fu (Stevens Institute of Technology)H-Index: 6
Last. Eui-Hyeok Yang (Stevens Institute of Technology)H-Index: 27
view all 13 authors...
Doping of two-dimensional (2D) semiconductors has been intensively studied toward modulating their electrical, optical, and magnetic properties. While ferromagnetic 2D semiconductors hold promise for future spintronics and valleytronics, the origin of ferromagnetism in 2D materials remains unclear. Here, we show that substitutional Fe-doping of MoS2 and WS2 monolayers induces different magnetic properties. The Fe-doped monolayers are directly synthesized via chemical vapor deposition. In both ca...
2 CitationsSource
The BICEP/Keck Array experiment is a series of small-aperture refracting telescopes observing degree-scale Cosmic Microwave Background polarization from the South Pole in search of a primordial Bmode signature. As a pair differencing experiment, an important systematic that must be controlled is the differential beam response between the co-located, orthogonally polarized detectors. We use high-fidelity, in-situ measurements of the beam response to estimate the temperature-to-polarization (T ...
Source
A detection of curl-type (B-mode) polarization of the primary CMB would be direct evidence for the inflationary paradigm of the origin of the Universe. The Bicep/Keck Array (BK) program targets the degree angular scales, where the power from primordial B-mode polarization is expected to peak, with ever-increasing sensitivity and has published the most stringent constraints on inflation to date. Bicep Array (BA) is the Stage-3 instrument of the BK program and will comprise four Bicep3-class recei...
5 CitationsSource
BICEP3 is a 520 mm aperture on-axis refracting telescope at the South Pole, which observes the polarization of the cosmic microwave background (CMB) at 95 GHz to search for the B-mode signal from inflationary gravitational waves. In addition to this main target, we have developed a low-elevation observation strategy to extend coverage of the Southern sky at the South Pole, where BICEP3 can quickly achieve degree-scale E-mode measurements over a large area. An interesting E-mode measurement is pr...
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The BICEP3 CMB Polarimeter is a small-aperture refracting telescope located at the South Pole and is specifically designed to search for the possible signature of inflationary gravitational waves in the Cosmic Microwave Background (CMB). The experiment measures polarization on the sky by differencing the signal of co-located, orthogonally polarized antennas coupled to Transition Edge Sensor (TES) detectors. We present precise measurements of the absolute polarization response angles and polariza...
2 Citations
#2Yuan GaoH-Index: 63
Last. Xian ZhangH-Index: 43
view all 8 authors...
Atomically thin materials such as graphene and semiconducting transition metal dichalcogenides have attracted extensive interest in recent years, motivating investigation into multiple properties. In this work, we used the opto thermal Raman technique to measure the thermal transport properties of a popular TMDC material WSe_2 in single atomic layer, bilayer, and trilayer forms.
1 Citations
#1Yingtao Wang (Stevens Institute of Technology)
#2Yuan Gao (UIUC: University of Illinois at Urbana–Champaign)H-Index: 63
Last. Xian Zhang (Stevens Institute of Technology)H-Index: 43
view all 6 authors...
Atomically thin materials like graphene and semiconducting transition metal dichalcogenides (TMDCs) have drawn broad interest in recent years, provoking investigation into multiple properties. In this work, we used the Raman optothermal technique to measure the thermal transport properties of a popular TMDC material WSe2, in the single-atomic layer (1L) form in both suspended and supported form. We implemented more direct measurements of the 1L WSe2 under study, and discovered WSe2’s absorption ...
1 CitationsSource
#1Jatin Kashyap (NJIT: New Jersey Institute of Technology)H-Index: 2
#2Eui-Hyeok Yang (Stevens Institute of Technology)H-Index: 27
Last. Dibakar Datta (NJIT: New Jersey Institute of Technology)H-Index: 13
view all 3 authors...
The ubiquitous presence of wrinkles in two-dimensional materials alters their properties significantly. It is observed that during the growth process of graphene, water molecules, sourced from ambient humidity or transferred method used, can get diffused in between graphene and the substrate. The water diffusion causes/assists wrinkle formation in graphene, which influences its properties. The diffused water eventually dries, altering the geometrical parameters and properties of wrinkled graphen...
1 CitationsSource
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