Article
Optics
Lijuan Sheng, Xinxing Zhou, Yuhan Zhong, Xinyan Zhang, Yu Chen, Zhiyou Zhang, Hongsheng Chen, Xiao Lin
Summary: The photonic spin Hall effect allows for quantifying the interaction between light and spin-orbit, enabling applications in precise metrology. In this effect, the light beam experiences a spin-dependent transverse shift. It is found that, unlike the reflection/transmission process, the transverse shift for transmitted light is always zero and independent of polarization, regardless of the incident angle. This is due to the complete suppression of conversion between the spin and orbital angular momenta of light during the transmission process. Similar polarization-independent photonic spin Hall effect is observed for reflected light.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Monu Nath Baitha, Kyoungsik Kim
Summary: In this study, the polarization-independent photonic spin Hall effect (PSHE) is achieved by manipulating the spin-orbit coupling of light. The thickness of the thin film can be adjusted to control the device's characteristic size. This finding will contribute to the development of polarization-independent nano-photonics devices.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Yougang Ke, Yongfeng Bian, Qiang Tang, Jibo Tian, Linzhou Zeng, Yu Chen, Xinxing Zhou
Summary: In this paper, the authors introduce a novel three-dimensional rotational photonic spin Hall effect (PSHE) and demonstrate how to control the rotation angle of the splitting patterns by adjusting the rotation angle of metasurfaces. They also show that the number of lobes in the splitting patterns can be independently controlled by introducing a dynamic phase. These findings enable active manipulation of spin photons in multiple dimensions and may have potential applications in optical microscopy, among other areas.
Review
Engineering, Electrical & Electronic
Lijuan Sheng, Yu Chen, Shuaijie Yuan, Xuquan Liu, Zhiyou Zhang, Hui Jing, Le-Man Kuang, Xinxing Zhou
Summary: The photonic spin Hall effect (PSHE) is a spin-related splitting phenomenon induced by the spin-orbit interaction of light. PSHE has been applied in fields such as optical interfaces, metasurfaces/metamaterials, and near-field optics, and has tremendous potential in precise metrology, spin-based nanophotonic devices, and mathematical operations. New methods to manipulate and enhance this effect are actively pursued.
PROGRESS IN QUANTUM ELECTRONICS
(2023)
Review
Nanoscience & Nanotechnology
Peng Shi, Luping Du, Xiaocong Yuan
Summary: Spin angular momentum associated with circular polarization is a fundamental aspect of photons in both classical and quantum optics. Transverse spin, perpendicular to the mean wavevector, plays a significant role in confined electromagnetic waves and leads to interesting topological spin structures and properties in the optical near-field. The concepts of spin photonics have importance in various fields like optics, topological photonics, metrology, and quantum technologies.
Article
Physics, Multidisciplinary
Shuaijie Yuan, Xinxing Zhou, Yu Chen, Yuhan Zhong, Lijuan Sheng, Hao Hu, Hongsheng Chen, Ido Kaminer, Xiao Lin
Summary: Effective-medium theory is a fundamental tool in modelling homogenization, simplifying the study of light-matter interactions. A breakthrough in this theory has been discovered, showing that the photonic spin Hall effect can be used to measure structural defects in all-dielectric systems at an extremely small scale.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Physics, Multidisciplinary
Yan Wei Ji, Xi Kui Ma, Hua Jie Hu, Xin Zhong Li
Summary: Optical analog computing and spatial differentiation have attracted great attention in various fields. In the field of biology and medicine, obtaining high-contrast phase images on a subwavelength scale is crucial. This study explores the spin Hall effect of light (SHEL) based on uniaxial crystals and investigates their effects on spatial differentiation, aiming to improve contrast for edges. Results show that the photonic spin Hall effect (PSHE) can be significantly enhanced in elliptic-hyperbolic crystals, and the contrasts for spatial differentiation are consistent with the enhancement of PSHE, suggesting potential applications in micro imaging.
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Jiaqing Liu, Xiao Li, Jiaqi Tao, Daxing Dong, Youwen Liu, Yangyang Fu
Summary: In this study, a significant enhancement of the photonic spin Hall effect (SHE) was achieved in a plasmonic metasurface with S-4 symmetry. A new method for designing spin-based nanophotonic devices was discovered.
Article
Optics
Jixiang Cai, Fei Zhang, Mingbo Pu, Ting Xie, Xingdong Feng, Honglin Yu, Xiangang Luo
Summary: This paper proposes all-metallic reflective metasurfaces with S-shape streamline structures to achieve the photonic spin-Hall effect with high conversion efficiency and bandwidth. Experimental results demonstrate the effectiveness of this structure and its potential applications in high-efficiency electromagnetic components and optics.
Article
Optics
Linguo Xie, Yu He, Fubin Yang, Youquan Dan, Xinxing Zhou, Zhiyou Zhang
Summary: In this study, a phase compensation scheme is proposed and experimentally verified to achieve symmetric spin splitting in photonic spin Hall effect. The research reveals that the transverse shift of the total barycenter in the reflected field remains unchanged, whether or not phase compensation is applied.
Article
Optics
Minkyung Kim, Dasol Lee, Junsuk Rho
Summary: This study demonstrates that an interface with equal reflection coefficients and their derivatives with respect to the incident angle supports polarization-independent spin Hall shift, even when the beam waist is comparable to the wavelength. An isotropic-anisotropic interface exhibiting polarization-independent spin Hall shift over the entire range of incident angles is also presented. These findings are significant for practical spin-dependent devices and active beam splitters.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Minkyung Kim, Dasol Lee, Junsuk Rho
Summary: This study proves that the spin Hall effect of light is independent of incident polarization and symmetrical in shift when the two linear polarization states have the same Fresnel coefficients. Under unpolarized incidence, the reflected beam is split into two circularly polarized components that undergo the same amount of splitting in opposite directions.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Ting Lei, Changyu Zhou, Dawei Wang, Zhenwei Xie, Boyuan Cai, Shecheng Gao, Youpeng Xie, Luping Du, Zhaohui Li, Anatoly Zayats, Xiaocong Yuan
Summary: A chip-integrated nanodisk device is demonstrated for high-speed coherent optical signal detection based on spin-orbit coupling in silicon photonics circuitry. The device can extract phase information through polarization measurements, enabling coherent signal recovery at multiple wavelengths. This technology offers low-cost and small footprint advantages in high-speed coherent optical communication applications.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Yanke Li, Yu Zou, Sheng Liu, Peng Li, Bingyan Wei, Jianlin Zhao
Summary: In this study, a scheme for initiating off-axis circular birefringence based on the spin-dependent wave vector bifurcation of Bessel beams via a single liquid crystal Pancharatnam-Berry phase element is proposed. The spin Hall effect is greatly enhanced by introducing nonlinear propagation trajectories, enabling flexible control of the spin separation.
PHOTONICS RESEARCH
(2023)
Article
Optics
Xiaohui Ling, Zan Zhang, Zhiping Dai, Zhiteng Wang, Hailu Luo, Lei Zhou
Summary: The physical origin of the photonic spin-Hall effect (PSHE) at optical interfaces is explored through studying the scatterings of circularly polarized beams obliquely incident on a series of junctions. The PSHE is determined by the interplay between the spin-redirection Berry (SRB) phase and the Pancharatnam-Berry (PB) phase. Shrinking the interfacial region can change the PSHE from SRB-dominated to PB-dominated.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Minkyung Kim, Dasol Lee, Soomin Son, Younghwan Yang, Heon Lee, Junsuk Rho
Summary: The proposed transparent radiative cooler is able to reduce temperatures while remaining transparent during the daytime by selectively blocking solar absorption, with the potential for practical applications such as passive diurnal cooling of vehicles or buildings.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Taejun Lee, Joohoon Kim, Ishwor Koirala, Younghwan Yang, Trevon Badloe, Jaehyuck Jang, Junsuk Rho
Summary: Efficiency- and scattering-enhanced structural color filters using all-dielectric metasurfaces made of engineered hydrogenated amorphous silicon nanoblocks are proposed and demonstrated. Transmission spectra exhibit 100% transmission and various colors are generated by controlling the resonance peak through geometric parameters. The devices are expected to find applications in dynamic color displays, imaging devices, and photorealistic color printing.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Inki Kim, Heonyeong Jeong, Joohoon Kim, Younghwan Yang, Dasol Lee, Trevon Badloe, Gyeongtae Kim, Junsuk Rho
Summary: Metasurfaces consisting of sub-wavelength structures have been researched as an alternative ultra-thin platform for flat optical devices, with one promising application being in multifunctional metaholograms for anticounterfeit purposes. By extending the operating wavelength band of conventional meta-holographic optics, it is possible to realize a security-enhanced anticounterfeit technology.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Hanlyun Cho, Heonyeong Jeong, Younghwan Yang, Trevon Badloe, Junsuk Rho
Summary: This work presents metalenses designed to enhance the luminous intensity of incoherent LEDs. By designing different phase profiles, the luminous intensity at the center and within the target detection angle region is successfully enhanced.
Article
Nanoscience & Nanotechnology
Sunae So, Younghwan Yang, Soomin Son, Dasol Lee, Dongwoo Chae, Heon Lee, Junsuk Rho
Summary: This study presents a selective multilayer emitter for eco-friendly daytime passive radiative cooling, designed to achieve sub-ambient cooling under direct sunlight. By optimizing material types and thickness and using a custom objective function, the structure achieves high-performance daytime radiative cooling in the solar region.
Article
Physics, Applied
Seong-Won Moon, Chihun Lee, Younghwan Yang, Joohoon Kim, Trevon Badloe, Chunghwan Jung, Gwanho Yoon, Junsuk Rho
Summary: Metalenses, composed of artificial subwavelength structures called meta-atoms, show abilities beyond conventional components by modulating light in an ultrathin planar form. This tutorial presents the fundamental principles, practical design procedures, and nanofabrication progress of metalenses, as well as critical considerations for advanced flat optics.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Won-Geun Kim, Jong-Min Lee, Younghwan Yang, Hongyoon Kim, Vasanthan Devaraj, Minjun Kim, Hyuk Jeong, Eun-Jung Choi, Jihyuk Yang, Yudong Jang, Trevon Badloe, Donghan Lee, Junsuk Rho, Ji Tae Kim, Jin-Woo Oh
Summary: Plasmonic nanoparticle clusters offer unique electromagnetic responses at optical frequencies and can be used for nanophotonic applications. This study presents a novel strategy for fabricating three-dimensional nanoparticle clusters with efficient coupling between gold nanoparticles and other nanomaterials. Quantum dots embedded in the clusters exhibit a blue shift in emission spectrum. In addition, an ultracompact diagnostic platform is demonstrated for detecting viruses and mutations.
Article
Multidisciplinary Sciences
Minkyung Kim, Dasol Lee, Younghwan Yang, Yeseul Kim, Junsuk Rho
Summary: This paper proposes and experimentally demonstrates a method to achieve high-efficiency large splitting effect in optical wavelength. By using a dielectric metasurface to modulate the complex transmission, shifts up to ten wavelengths and efficiencies over 70% are achieved.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Byoungsu Ko, Trevon Badloe, Younghwan Yang, Jeonghoon Park, Jaekyung Kim, Heonyeong Jeong, Chunghwan Jung, Junsuk Rho
Summary: This study demonstrates the fabrication of tunable and erasable optical security metasurfaces using a nanoimprinting technique with nanostructured polyvinyl alcohol (PVA). The PVA nanostructures exhibit high resolution and aspect ratios, and their response to changes in relative humidity allows for precise wavefront manipulation of visible light. Various highly-secure multiplexed optical encryption functionalities are achieved based on irreversible and reversible changes in relative humidity.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Won-Geun Kim, Vasanthan Devaraj, Younghwan Yang, Jong-Min Lee, Ji Tae Kim, Jin-Woo Oh, Junsuk Rho
Summary: The study focuses on metallic nanoparticles supporting localized surface plasmons and their self-assembled clustering technique, proposing a micropipette-based self-assembly method for fabricating three-dimensional structures composed of colloidal clusters. Experimental demonstrations of the optical properties of these structures, as well as theoretical demonstrations of their localized surface plasmon resonance and thermo-plasmonic properties, were carried out.
Review
Optics
Jaekyung Kim, Junhwa Seong, Younghwan Yang, Seong-Won Moon, Trevon Badloe, Junsuk Rho
Summary: Tunable metasurfaces have the ability to manipulate the phase, amplitude, and polarization of light in a compact form. Recent progress has been made in metalenses and metaholograms, and the advantages and disadvantages of different working mechanisms are discussed.
ADVANCED PHOTONICS
(2022)
Article
Optics
Minkyung Kim, Dasol Lee, Younghwan Yang, Junsuk Rho
Summary: This paper presents the design and simulation of a switchable radiative cooler that utilizes the phase transition in vanadium oxide to achieve temperature-responsive cooling. The feasibility of cooling is confirmed under real outdoor conditions, showing that the cooler can maintain the desired temperature even with changes in environmental conditions.
OPTO-ELECTRONIC ADVANCES
(2021)
Review
Materials Science, Multidisciplinary
Joohoon Kim, Younghwan Yang, Trevon Badloe, Inki Kim, Gwanho Yoon, Junsuk Rho
Summary: Metasurfaces made of subwavelength structures, known as meta-atoms, have been attracting attention for their advantages in high-resolution holographic images, large field of view, and compact device volume. In this review, metasurface holography is classified based on meta-atom design methodologies, which can expand hologram functionalities. The interaction of light and matter in metasurface systems is described using the Jones matrix to explain modulations of light amplitude, phase, and polarization.
Article
Nanoscience & Nanotechnology
Chunghwan Jung, Younghwan Yang, Jaehyuck Jang, Trevon Badloe, Taejun Lee, Jungho Mun, Seong-Won Moon, Junsuk Rho
Summary: Structural coloration using metasurfaces has been researched to improve the limitations of conventional color printing, achieving higher resolution, lower toxicity, and increased durability. A switchable structural coloration with polarization-sensitive metasurfaces enables full-colored images to be displayed and hidden, with near-zero scattering when colors are turned-off.
