Article
Chemistry, Physical
Ning Li, Xiangdong Guo, Xiaoxia Yang, Ruishi Qi, Tianyu Qiao, Yifei Li, Ruochen Shi, Yuehui Li, Kaihui Liu, Zhi Xu, Lei Liu, F. Javier Garcia de Abajo, Qing Dai, En-Ge Wang, Peng Gao
Summary: The study successfully measured and observed phonon polaritons in monolayer hexagonal boron nitride using monochromatic electron energy-loss spectroscopy, revealing highly confined and ultraslow group velocity characteristics. The large momentum compensation provided by electron beams also enabled phonon polariton excitation over the entire Reststrahlen band of multilayer hexagonal boron nitride.
Article
Nanoscience & Nanotechnology
Huan Chen, Meijuan Sun, Jie Ma, Baobao Zhang, Chi Wang, Lei Guo, Tao Ding, Zhenglong Zhang, Hairong Zheng, Hongxing Xu
Summary: Rare-earth-doped upconversion luminescence has unique emission spectra, but application is limited by background noise and quantum yield; multiplasmons-excited upconversion luminescence using surface plasmons polaritons achieves high luminescence enhancement and noise reduction; investigation of multiplasmon-excited luminescence sheds light on light-matter interactions and super-resolution imaging.
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
Nanoscience & Nanotechnology
Nikolai B. Chichkov, Andrey B. Evlyukhin, Boris N. Chichkov
Summary: The letter evaluates the rest mass of light-induced surface-plasmon polaritons (SPPs) and discusses the idea of collisions between two massive SPP quasiparticles resulting in frequency changes according to energy and momentum conservation laws.
Article
Physics, Applied
Yunsheng Hu, Yihua Bai, Qing Zhang, Yuanjie Yang
Summary: This study proposes an ultra-thin and electric tunable graphene/hexagonal boron nitride/graphene metasurface for detecting molecular fingerprints. The metasurface supports hybrid plasmon-phonon polariton resonance with high-quality factor and can achieve tunability over a broad spectrum. This method enables broadband fingerprint retrieval of bio-molecules and paves the way for highly sensitive, miniaturized, and electrically addressed biosensing and infrared spectroscopy.
APPLIED PHYSICS LETTERS
(2022)
Review
Chemistry, Physical
Benjamin Sierra-Martin, Antonio Fernandez-Barbero
Summary: This article reviews and compares the optical properties of metallic nanoparticles and nanovoids, which are capable of generating and controlling plasmon resonances. These systems can concentrate and manipulate fields at the nanometer scale, making them attractive building blocks for emerging applications. Metal particles and nanovoids exhibit different plasmonic modes, dependent on factors such as size, shape, and material properties. Specific geometrical features, like the presence of rims in nanovoids, make them promising structures for designing exotic band spectra due to the coupling between different resonant modes.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Optics
Tao Hou, Huanyang Chen
Summary: This study obtains the equivalent permittivity distribution of 2D heterostructures using the effective medium theory and analyzes the rotation-induced topological transitions and stack-dependent topological transitions of phonon polaritons. The topological transition points can be predicted by a parameter epsilon x/y, and the phonon polaritons in stacked materials can be precisely designed by controlling the equivalent permittivity. The feasibility of the effective medium theory is verified and the field distributions and dispersions of the 2D heterostructures are compared with the corresponding equivalent structure. The study provides a simpler and clearer criterion for the study of photonic topological transition in anisotropic polaritons and shows great potential in designing multilayer 2D heterostructures.
Article
Multidisciplinary Sciences
Shu Chen, Andrei Bylinkin, Zhengtianye Wang, Martin Schnell, Greeshma Chandan, Peining Li, Alexey Y. Nikitin, Stephanie Law, Rainer Hillenbrand
Summary: This study successfully captures and analyzes the properties and dispersion of plasmon polaritons in thin Bi2Se3 layers using THz near-field imaging technique. The results show that the momentum and decay time of polaritons significantly increase compared to photons, but the propagation length is short. The study further reveals the coupling process between THz radiation and Dirac and Massive carriers on the surface of topological insulators and carriers and photons in the bulk.
NATURE COMMUNICATIONS
(2022)
Review
Nanoscience & Nanotechnology
Sergey G. Menabde, Jacob T. Heiden, Joel D. Cox, N. Asger Mortensen, Min Seok Jang
Summary: Polaritonic modes in low-dimensional materials enable strong light-matter interactions and the manipulation of light on nanometer length scales. The recent interest in image polaritons in van der Waals crystals has gained considerable attention in nanophotonics, where a polaritonic material couples with its mirror image in close proximity to a highly conductive metal. These image modes provide an appealing nanophotonic platform with lower propagation loss and access to the nonlocal regime of light-matter interaction.
Article
Multidisciplinary Sciences
Yaniv Kurman, Raphael Dahan, Hanan Herzig Sheinfux, Kangpeng Wang, Michael Yannai, Yuval Adiv, Ori Reinhardt, Luiz H. G. Tizei, Steffi Y. Woo, Jiahan Li, James H. Edgar, Mathieu Kociak, Frank H. L. Koppens, Ido Kaminer
Summary: Investigating the dynamic phenomena of 2D polaritons in 2D materials requires the use of a ultrafast transmission electron microscope with simultaneous spatial and temporal imaging capabilities, which can reveal unknown coherent optical phenomena such as splitting of multibranch wave packets, wave packet deceleration, and acceleration.
Article
Chemistry, Physical
Jun Wu, Ye Ming Qing
Summary: The strong coupling between excitons in few-layer transition-metal dichalcogenide (TMDC) and guided mode resonance (GMR) or bound state in the continuum (BIC) is investigated. The results show that a large Rabi splitting can be achieved by changing the grating period, reaching up to 155 meV or 162 meV, respectively. The physical origins behind this behavior are revealed through studying the electric field distributions at resonance and theoretical verification according to the coupled-oscillator model. The effect of geometric dimensions on the strong coupling is also studied, offering guidance for real fabrication and paving the way for novel, compact TMDC-based polaritonic devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Multidisciplinary Sciences
Wenyu Zhao, Sihan Zhao, Hongyuan Li, Sheng Wang, Shaoxin Wang, M. Iqbal Bakti Utama, Salman Kahn, Yue Jiang, Xiao Xiao, SeokJae Yoo, Kenji Watanabe, Takashi Taniguchi, Alex Zettl, Feng Wang
Summary: The study demonstrates the direct observation of the plasmonic Doppler effect in biased monolayer graphene, showing a non-reciprocal plasmon propagation due to fast drifting Dirac electron medium hosting the plasmon polariton. Cryogenic near-field infrared nanoscopy was used to measure the Doppler-shifted plasmon wavelength, showing a significant difference between plasmons moving with and against the drifting electron media. These findings open up opportunities for electrical control of non-reciprocal surface plasmon polaritons in non-equilibrium systems.
Article
Physics, Applied
Alexander M. Holmes, George W. Hanson
Summary: Conditions defining the spectral location of bandgaps in the quasi-transverse magnetic surface plasmon polariton modal dispersion for 2D/quasi-2D materials with a tensor response function embedded in a simple isotropic medium are obtained. In the isotropic case, transverse magnetic surface plasmon polariton modes propagate with an inductive surface conductivity. However, in the anisotropic case, quasi-transverse magnetic modes are supported by surfaces with an inductive effective conductivity along the direction of propagation. Examples of natural anisotropic 2D/quasi-2D materials are provided to demonstrate the effectiveness of the method.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Jun Zhang, Jinpeng Nong, Fu Feng, Changjun Min, Xiaocong Yuan, Michael Somekh
Summary: A hybrid plasmonic system was proposed in this study, which can simultaneously excite multi-order anisotropic borophene surface plasmons and magnetic polaritons. By tuning the resonant wavelengths to match each other, the absorption of borophene surface plasmons can be significantly improved, potentially finding applications in the design of boron-based optoelectronic devices in the infrared region.
RESULTS IN PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
T. P. Rasmussen, P. A. D. Goncalves, Sanshui Xiao, Sebastian Hofferberth, N. Asger Mortensen, Joel D. Cox
Summary: By bending 2D materials into parabolic shapes to form waveguides, the field confinement associated with graphene plasmons can be significantly increased, leading to the formation of plasmonic waveguides. In 2D parabolic waveguides, the high field confinement of channel polaritons can enhance the spontaneous emission rate of quantum emitters near the parabolic vertex.
Article
Materials Science, Multidisciplinary
Hayoung Ko, Soo Ho Choi, Jungmo Kim, Yong In Kim, Young-Hoon Kim, Laud Anim Adofo, Min-Hyoung Jung, Young-Min Kim, Mun Seok Jeong, Ki Kang Kim, Soo Min Kim
Summary: A novel method for synthesizing highly uniform and continuous m-hBN films on smooth Fe foil has been developed, achieving significant improvement in gas barrier performance with a water vapor transmission rate of 0.01 g m(-2) day, seven times lower than previously reported. The m-hBN/graphene heterostructure on polyethylene terephthalate retains a high transparency of 96.4% at a wavelength of 550 nm.
Article
Nanoscience & Nanotechnology
Hyeon Jun Jeong, Chulho Park, Hobeom Jeon, Kang-Nyeoung Lee, Juchan Lee, Seong Chu Lim, Gon Namkoong, Mun Seok Jeong
Summary: Organometal halide perovskite materials have been utilized to fabricate resistive-switching memory devices with nonvolatile write-once read-many characteristics. Quasi-2D films demonstrate low trap density and operate through the formation of conductive filaments, while 3D films exhibit hysteresis behavior. High current channels along perovskite grain boundaries play a crucial role in the conductive low-resistive-switching behavior in WORM devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Sunho Joh, Hee-Kyung Na, Jin Gyeong Son, A. Young Lee, Cheol-Hee Ahn, Da-Jeong Ji, Jung-Sub Wi, Mun Seok Jeong, Sang-Guk Lee, Tae Geol Lee
Summary: The study proposed an alternative quantification method for therapeutic drug monitoring (TDM) of immunosuppressive drugs in organ transplantation patients using tungsten disulfide nanosheets and laser desorption ionization mass spectrometry (LDI-MS). The high-throughput analysis of blood samples was achieved through a microliquid inkjet printing system.
Article
Chemistry, Multidisciplinary
Hyeongwoo Lee, Inki Kim, Chulho Park, Mingu Kang, Jinseong Choi, Kwang-Yong Jeong, Jungho Mun, Yeseul Kim, Jeonghoon Park, Markus B. Raschke, Hong-Gyu Park, Mun Seok Jeong, Junsuk Rho, Kyoung-Duck Park
Summary: The study introduces a new approach to induce and probe the emission of localized excitons in atomically thin semiconductors using hybrid-modality cavity-spectroscopy. By placing a WSe2 monolayer on sharp gold tips, the enhanced emission and detection of X-L at room temperature is achieved.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Chulho Park, Juchan Lee, Min Jeong Kim, Ngoc Thanh Duong, Mun Seok Jeong, Seong Chu Lim
Summary: Investigations into the diode behaviors of MoTe2 and ReS2 heterostructures revealed a crossover between thermionic emission and Fowler-Nordheim tunneling for carrier injection mechanisms. Experimental and theoretical analyses demonstrated that carrier injection can be controlled by modulating the potential barrier height, temperature, and applied strength. This study expands our understanding of charge transport mechanisms in staggered TMD heterojunctions.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Tanzila Tasnim Ava, Hyeon Jun Jeong, Hyang Mi Yu, Kang-Nyeoung Lee, Tarek M. Abdel-Fattah, Mun Seok Jeong, Gon Namkoong
Summary: This study demonstrates that poly (methyl methacrylate) (PMMA) can enhance the thermal stability of perovskite films by altering the chemical composition of grain boundaries to make them more heat-resistant. Hydrated compounds act as catalysts for thermal degradation at grain boundaries, while PMMA absorbs moisture and drives it out, protecting the grain boundaries from degradation.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Gisung Kim, Namhee Kwon, Dongho Lee, Mijoung Kim, Moonhoe Kim, Yongjei Lee, WooJong Kim, Daseul Hyeon, Bora Kim, Mun Seok Jeong, Jinpyo Hong, JungYup Yang
Summary: Recent studies have found that copper (I) thiocyanate (CuSCN) has significant potential as a hole extraction material for perovskite solar cells. However, the use of CuSCN can lead to unwanted dissociation of MAPbI(3) to PbI2, and the solvent DES can damage the surface of the perovskite layer. By increasing the molar ratio of MAI in the MAPbI(3) precursor solution, the surface damage to MAPbI(3) can be reduced and the dissociation to PbI2 can be effectively suppressed.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jaekak Yoo, Kihyuk Yang, Byeong Wook Cho, Ki Kang Kim, Seong Chu Lim, Seung Mi Lee, Mun Seok Jeong
Summary: In this study, the phonon vibrational origin of a single sulfur-vacancy-induced Raman peak was identified as A(1)'(k) through quantum mechanical calculations. This finding is of great importance for improving the quality of transition metal dichalcogenides materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Byeong Geun Jeong, Chanwoo Lee, Sung Hyuk Kim, Seok Joon Yun, Dong Hyeon Kim, Juchan Lee, Dongki Lee, Ki Kang Kim, Seong Chu Lim, Mun Seok Jeong
Summary: Defect analysis in two-dimensional transition-metal dichalcogenides (TMDs) is important due to its significant impact on the optical and electrical properties of TMD. This study investigated the influence of sulfur vacancies and oxygen substitution on the optical properties of WS2 using laser irradiation technique. The defect-induced photoluminescence (PL) exhibited distinct features depending on the type of defects, resulting in changes in the intensities and peak positions of excitons, biexcitons, and defect-bound excitons. Defect-activated Raman modes provided information about the defects and revealed the origin of the alteration in PL.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Bora Kim, Moonhoe Kim, Hyojung Kim, Sohee Jeong, JungYup Yang, Mun Seok Jeong
Summary: Perovskite solar cells (PSCs) have short lifetimes, but by using transition metal dichalcogenide (TMD) interlayers, both efficiency and stability of the devices can be improved.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Phuong Huyen Nguyen, Duc Hieu Nguyen, Donghyoung Kim, Mun Kyoung Kim, Jiseong Jang, Woo Hyeong Sim, Hyung Mo Jeong, Gon Namkoong, Mun Seok Jeong
Summary: This study investigates the regeneration of oxidized titanium carbide (Ti3C2Tx) through hydrofluoric acid (HF) post-treatment. The research reveals that the post-treatment can restore the structure and surface composition of MXene nanosheets, thereby improving their electrical conductivity and prolonging their conductivity maintenance time. This finding is crucial for the rational design of Ti3C2Tx-based devices and functional coatings.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Hwi Je Woo, Sangmin Ji, Jaewon Han, Seongwon Woo, Hyuntae Kim, Seonyeong Kim, Chang-Won Lee, Soobong Choi, Deok-Soo Kim, Mun Seok Jeong, Euyheon Hwang, Byungkwon Lim, Young Jae Song
Summary: We used scattering-type near-field scanning optical microscopy (s-NSOM) to observe optical phenomena on mono-crystalline silver nanoflakes. The momentum of tip-launched surface plasmon polaritons (SPPs) was successfully identified and showed good agreement with analytical calculations.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Wonchae Jeong, Taeyoung Kim, Yoonsok Kim, Mun Seok Jeong, Eun Kyu Kim
Summary: We demonstrate area-selective doping of MoS2 field-effect transistors using 1,2-dichloroethane (DCE) solution. X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy measurements confirm the blocked layer (BL) using a photoresist, which suppresses the doping effect of the DCE treatment. Electrical measurements confirm the enhancement in field-effect mobility and subthreshold swing after area-selective doping.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Geunchang Choi, Dong-Hwan Choi, Junho Ryeom, Dae Young, Wu-Sin Kim, Ju-Jin Kim, Young-Mi Bahk, Mun Seok Jeong
Summary: High-quality indium thin films were fabricated by substrate cooling method, reducing the threshold thickness for insulator-to-metal transition. The films' complex conductivities were measured by terahertz time-domain spectroscopy, showing that the conductivity of the cooled indium films was 10 times higher than that deposited at room temperature, despite their lower thickness. These results suggest the promising applications of substrate cooling in metal thin films and contacts.
CURRENT APPLIED PHYSICS
(2023)
Article
Automation & Control Systems
Jaekak Yoo, Youngwoo Cho, Byeonggeun Jeong, Soo Ho Choi, Ki Kang Kim, Seong Chu Lim, Seung Mi Lee, Jaegul Choo, Mun Seok Jeong
Summary: The application of explainable artificial intelligence in nanomaterial research has facilitated the discovery of novel physical findings. In this study, the correlation between light scattering and emission in a WSe2 monolayer is investigated by bridging explainable artificial intelligence and quantum mechanical calculations. Convolutional neural networks are trained using light scattering and emission data to determine the relationships between them. The findings are independently evaluated through quantum mechanical calculations, providing reliable fundamental physical insight and suggesting a novel methodology for materials science.
ADVANCED INTELLIGENT SYSTEMS
(2023)
