Article
Optics
Jie Chen, Yang Fan
Summary: The study investigates topological Bloch-Zener oscillations for surface plasmon polaritons in a Su-Schrieffer-Heeger plasmonic system with graphene dimer arrays. Topological transition from trivial to non-trivial phase is achieved by alternating gain and loss in the graphene waveguide arrays. Zener tunneling of SPP beam is observed in the parity-time symmetric region.
OPTICS COMMUNICATIONS
(2022)
Article
Optics
Shinho Kim, Sergey G. Menabde, Joel D. Cox, Tony Low, Min Seok Jang
Summary: By utilizing a graphene-covered nanogap waveguide, the modulator overcomes wavelength limitations and achieves modulation depths exceeding 20 dB, making it more suitable for practical applications.
Article
Engineering, Electrical & Electronic
Miao Sun, Zhuanling He, Xiaohong Lan, Libing Huang
Summary: This paper proposes a hybrid plasmonic waveguide structure composed of graphene-coated nanotube and a dielectric substrate, and demonstrates its potential applications in nanophotonic devices by studying its transmission properties.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Timothy J. Palinski, Brian E. Vyhnalek, Gary W. Hunter, Amogha Tadimety, John X. J. Zhang
Summary: This study demonstrates a platform for the active switching of hybrid plasmonic-photonic Fano resonances, achieving on/off switching of narrow Fano resonance transparency windows with high contrast and tunability across a wide spectral range by modulating refractive index. The structure includes gold nanogratings sandwiched between two dielectric thin films, and controlling the interaction of substrate and superstrate modes through refractive index tuning enables both spectral and spatial selectivity.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Muzzamal Iqbal Shaukat, Montasir Qasymeh, Hichem Eleuch
Summary: This study investigates the emergence of solitons in plasmonic graphene waveguides in the presence of optical and microwave fields. Electronically controlled coupled optical solitons can be achieved by altering the self- and cross-modulation terms through proper electrical biasing and doping concentration.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Toni Haugwitz, Niels Neumann, Dirk Plettemeier
Summary: This study investigates the optical scattering behavior of an artificial plasmonic molecule formed by a linear arrangement of three gold nanobars on a glass substrate. By modifying the near-field coupling effect, it demonstrates an increase in the feedback of optically induced coherent mechanical oscillations. The research also highlights the differences compared to isolated plasmonic nanostructures, particularly in the near-infrared spectral range, and presents the behavior of coherent acoustic vibrations in such artificial plasmonic molecules at an optical carrier wavelength of 1560nm.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Da Teng, Kai Wang
Summary: The study investigates the waveguiding of terahertz surface plasmons by a GaAs strip-loaded graphene waveguide using effective-index method and finite element method. It examines modal properties such as effective mode index, modal loss, cut-off characteristics of higher order modes, and shows the potential for tuning the fundamental mode by modulating the Fermi level. Additionally, it validates the accuracy of the effective-index method and studies crosstalk between adjacent waveguides for determining device integration density.
Article
Materials Science, Multidisciplinary
Kai He, Tigang Ning, Jing Li, Li Pei, Jingjing Zheng, Jianshuai Wang, Bing Bai
Summary: A high-efficiency wavefront reconfigurable metasurface is proposed in this study, which features multiple optional functions, including perfect absorption, arbitrary multi-focus, and self-healing. Using resonant strategy in the THz frequency range, the designed metasurface can shape the wavefront at will without reconstituting the device's configuration. The reflected phase shifts exhibit active adjustable characteristics within the Fermi level range from 0 eV to 0.6 eV, corresponding to a phase coverage of 0 -2 pi. The proposed wavefront reconfigurable metasurface may open up new avenues for wave manipulation and have profound implications in optical communications.
RESULTS IN PHYSICS
(2023)
Article
Optics
Shicheng Zhu, Lin-Lin Su, Jun Ren
Summary: This study demonstrates the efficient tuning of incoherent and coherent coupling between emitters in an epsilon-near-zero (ENZ) waveguide coated with multilayer graphene. A tunable two-qubit quantum phase gate is achieved at the ENZ waveguide's cutoff frequency. The vanishingly small permittivity of the ENZ waveguide allows for near-ideal bipartite and multipartite entanglement, while the coherent coupling and energy transfer efficiency can be effectively tuned by the Fermi level of graphene.
Article
Nanoscience & Nanotechnology
Hadi Soleimani, Homayoon Oraizi
Summary: A novel plasmonic leaky wave antenna based on modulated cylindrical graphene waveguide radius is presented in this paper, showing improved performance compared to previous structures with narrower beam width and higher radiation efficiency.
Review
Physics, Multidisciplinary
Stephane A. Boubanga-Tombet, Akira Satou, Deepika Yadav, Dmitro B. But, Wojciech Knap, Vyacheslav V. Popov, Ilya Gorbenko, Valentin Kachorovskii, Taiichi Otsuji
Summary: This study presents recent advances in room-temperature coherent amplification of THz radiation in graphene, driven by a dry cell battery. The research explores resonant absorption, perfect transparency, and resonant amplification in a graphene system, demonstrating a maximal gain of 9% at room temperatures. These results pave the way for tunable graphene plasmonic THz amplifiers.
FRONTIERS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Wenyu Zhao, Hongyuan Li, Xiao Xiao, Yue Jiang, Kenji Watanabe, Takashi Taniguchi, Alex Zettl, Feng Wang
Summary: Graphene nanoribbons with low edge roughness fabricated using dry lithography method support low-loss and tunable plasmonic waveguide modes, which were observed using cryogenic infrared nanoscopy and can be adjusted through electrostatic gating.
Article
Nanoscience & Nanotechnology
Junhyung Kim, Geonwoo Lee, Sergey G. Menabde, Yong Jai Cho, Carsten Rockstuhl, Min Seok Jang
Summary: Graphene plasmons have dynamic tunability and extreme field confinement. The temperature effects are significant for graphene-based tunable plasmonic devices operating at low temperatures.
Article
Physics, Multidisciplinary
Jinwen Huang, Zhengyong Song
Summary: The terahertz waveguide modulator combining noble metal and graphene was studied, showing an increase in propagation loss with a change in Fermi level. Optimization of structure parameters led to a modulation depth of 6.1 dB μm(-1) at 5 THz. The device achieved a modulation depth of 1.5 dB μm(-1) at 10 THz while maintaining an effective mode area below 10(-5), due to the confinement of allowed mode in a small area.
Article
Chemistry, Analytical
Victor Coello, Mas-ud A. Abdulkareem, Cesar E. Garcia-Ortiz, Citlalli T. Sosa-Sanchez, Ricardo Tellez-Limon, Marycarmen Pena-Gomar
Summary: In this study, the optical properties of a 2D-gap surface plasmon metasurface composed of gold nanoblocks were investigated. The metasurface demonstrated the capability to generate simultaneous multi-plasmonic resonances and offered tunability within the near-infrared domain. Reflectance spectra were analyzed for various lattice periods, revealing two distinct dips with near-zero reflectance indicating resonant modes. The broader dip at 1150 nm exhibited consistent behavior across all lattice periodicities, attributed to a Fano-type hybridization mechanism.
Article
Nanoscience & Nanotechnology
Junhyung Kim, Geonwoo Lee, Sergey G. Menabde, Yong Jai Cho, Carsten Rockstuhl, Min Seok Jang
Summary: Graphene plasmons have dynamic tunability and extreme field confinement. The temperature effects are significant for graphene-based tunable plasmonic devices operating at low temperatures.
Article
Multidisciplinary Sciences
Sergey G. Menabde, Sergejs Boroviks, Jongtae Ahn, Jacob T. Heiden, Kenji Watanabe, Takashi Taniguchi, Tony Low, Do Kyung Hwang, N. Asger Mortensen, Min Seok Jang
Summary: This research uses large-area monocrystalline gold flakes as a low-loss substrate for image polaritons, accurately measures the complex propagation constant of polaritons in van der Waals crystals, and finds that the propagation loss and normalized propagation length of image phonon-polaritons have specific spectral dependencies.
Article
Engineering, Biomedical
Jae Hee Lee, Yuri Ahn, Han Eol Lee, You Na Jang, A. Yeon Park, Shinho Kim, Young Hoon Jung, Sang Hyun Sung, Jung Ho Shin, Seung Hyung Lee, Sang Hyun Park, Ki Soo Kim, Min Seok Jang, Beom Joon Kim, Sang Ho Oh, Keon Jae Lee
Summary: A wearable surface-lighting micro-LED (S mu LED) photostimulator is reported for skin care and cosmetic applications. The S mu LEDs maximize photostimulation effectiveness on the skin surface by uniform irradiation, high flexibility, and thermal stability, and its anti-melanogenic effect is confirmed through experiments.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yonas Assefa Eshete, Eunji Hwang, Junhyung Kim, Phuong Lien Nguyen, Woo Jong Yu, Bai Sun Kong, Min Seok Jang, Jaekwang Lee, Suyeon Cho, Heejun Yang
Summary: Researchers have developed a polymorphic memtransistor based on Mo0.91W0.09Te2, which allows tuning of the lattice and electronic structures of the channel material to achieve metallic or semiconducting phases. This memtransistor exhibits high on/off ratio, low subthreshold swing, and various memristive behaviors, making it suitable for neuromorphic and in-memory computing applications.
ADVANCED MATERIALS
(2023)
Correction
Nanoscience & Nanotechnology
Sergey G. Menabde, Min Seok Jang
NATURE NANOTECHNOLOGY
(2023)
Article
Optics
Chanhyung Park, Jeongmin Shin, Sanmun Kim, Songju Lee, Juho Park, Jaehyeok Park, Sehong Park, Seunghyup Yoo, Min Seok Jang
Summary: Researchers propose a new simulation method, called the diffraction matrix method (DMM), that accurately predicts the optical characteristics of periodically corrugated OLEDs with significantly faster calculation speed. The method decomposes the light emitted by a dipolar emitter into plane waves and tracks the diffraction behavior using diffraction matrices. The calculated optical parameters show quantitative agreement with those predicted by the finite-difference time-domain (FDTD) method. Furthermore, the method evaluates the wavevector-dependent power dissipation of a dipole and identifies the loss channels inside OLEDs in a quantitative manner.
Article
Construction & Building Technology
Tam Minh Phan, Min-Seok Jang, Jung-Woo Seo, Jae-Hyeong Yoon, Dae-Wook Park, Tri Ho Minh Le
Summary: This study investigates two methods, rain sensor and deep learning, for detecting black ice on road surfaces, considering the influence of environmental conditions on black ice formation. Results showed that the rain sensor method can detect black ice formation through electrical resistance. Lower air voids in asphalt concrete increase the chance of black ice formation, while humidity has a negligible effect. A vehicle module using deep learning achieves 90% accuracy in detecting black ice. Findings also indicate that environmental temperature affects the melting time and area of black ice.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Minhyeok Kim, Se Hun Joo, Meihui Wang, Sergey G. Menabde, Da Luo, Sunghwan Jin, Hyeongjun Kim, Won Kyung Seong, Min Seok Jang, Sang Kyu Kwak, Sun Hwa Lee, Rodney S. Ruoff
Summary: This study presents an electrochemical method for functionalizing single-crystal graphene on copper foils. The transfer-free method enables precise and efficient functionalization of graphene. The study also compares the reactivity of graphene on different facets and explains the differences in reaction rates using work function measurements.
Article
Chemistry, Multidisciplinary
Gabriel R. Jaffe, Gregory R. Holdman, Min Seok Jang, Demeng Feng, Mikhail A. Kats, Victor Watson Brar
Summary: Laser sails powered by ground-based lasers could achieve relativistic speeds, allowing for fast interstellar travel. However, interplanetary dust poses a significant threat to the survival of laser sails during acceleration. Simulations demonstrate that a single dust particle can trigger a thermal runaway process, destroying the entire sail. Proposed mitigation strategies include increasing thermal conductivity and isolating absorptive regions of the sail.
Article
Multidisciplinary Sciences
Seungjun Lee, Dongjea Seo, Sang Hyun Park, Nezhueytl Izquierdo, Eng Hock Lee, Rehan Younas, Guanyu Zhou, Milan Palei, Anthony J. Hoffman, Min Seok Jang, Christopher L. Hinkle, Steven J. Koester, Tony Low
Summary: This study demonstrates near-perfect light absorbers (NPLAs) using two or three uniform atomic layers of transition metal dichalcogenides (TMDs), by taking advantage of the exceptional band nesting effect in TMDs and a Salisbury screen geometry. The NPLAs achieved absorbance values of at least 99% without requiring complex nanolithography, making them suitable for practical applications on large-area platforms.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Sanmun Kim, Chanhyung Park, Shinho Kim, Haejun Chung, Min Seok Jang
Summary: This work reports on the influence of design parameters on the optical efficiency of metasurface-based color splitters, as well as the possibility of fabricating them in legacy fabrication facilities with low structure resolutions.
Article
Optics
Junghoon Jahng, Sunho Lee, Seong-Gu Hong, Chang Jun Lee, Sergey G. Menabde, Min Seok Jang, Dong-Hyun Kim, Jangyup Son, Eun Seong Lee
Summary: This study reports, for the first time, the nanoscopic imaging of anomalous infrared phonon enhancement in bilayer graphene due to charge imbalance between its top and bottom layers. By modifying the multifrequency atomic force microscope platform, a hybrid nanoscale optical-electrical force imaging system is created, enabling the observation of correlation between IR response, doping level, and topographic information of graphene layers. The study also demonstrates the control of charge imbalance and diagnosis of subsurface cracks in few-layer graphene through chemical and mechanical approaches.
LIGHT-SCIENCE & APPLICATIONS
(2023)
