Collection 09 April 2024

Special Issue on Optics and Photonics Research in Korea

Collaborative innovation between academia and industry has been a driving force behind the significant advances in photonics research in South Korea. In this special issue, we present cutting-edge research in photonics, highlighting the importance of collaboration between academia and industry. This issue covers a wide range of topics in photonics including biomedical applications, imaging, micro light emitting diodes, quantum dot emitters, deformable displays, thin-flat optics, radiative cooling, and 2D optical devices. Additionally, we introduce upcoming disruptive photonic applications with periodically arranged structures and their integration with conventional optics. This special issue can serve as a reference for the current and future research directions of photonics in South Korea.

Content

Building an optics and photonics research ecosystem in South Korea: Collaborative innovation between academia and industry
- Younghwan Yang
- Trevon Badloe
- Junsuk Rho
EditorialOpen Access4 Dec 2023 Light: Science & Applications
Controlled afterglow luminescent particles for photochemical tissue bonding

Afterglow luminescent particles of ZnS:Ag,Co are developed as an efficient light delivery agent for photochemical tissue bonding in deep tissues with prolonged luminescence.
- Seong-Jong Kim
- Minji Choi
- Sei Kwang Hahn
ArticleOpen Access27 Oct 2022 Light: Science & Applications
Deep learning acceleration of multiscale superresolution localization photoacoustic imaging

Computational strategy based on deep neural networks enables to reconstruct high-density superresolution localization photoacoustic images from far fewer raw image frames.
- Jongbeom Kim
- Gyuwon Kim
- Chulhong Kim
ArticleOpen Access12 May 2022 Light: Science & Applications
Rapid species identification of pathogenic bacteria from a minute quantity exploiting three-dimensional quantitative phase imaging and artificial neural network

Label-free rapid deep-learning-based identification of bacterial species that classifies 3D refractive index tomograms into the species.
- Geon Kim
- Daewoong Ahn
- YongKeun Park
ArticleOpen Access23 Jun 2022 Light: Science & Applications
Geometric-phase intraocular lenses with multifocality

Multifocal and extended depth-of-focus intraocular lenses (IOLs) embedding μm-thin geometric phase (GP) layers are demonstrated. GP-IOLs will alleviate blurred vision and photic phenomena of conventional presbyopia-correction IOLs.
- Seungmin Lee
- Gayeon Park
- Seok Ho Song
ArticleOpen Access2 Nov 2022 Light: Science & Applications
Massively parallel electro-optic sampling of space-encoded optical pulses for ultrafast multi-dimensional imaging

Ultrafast multidimensional imaging is made possible by the electro-optic sampling of arrival timings of multiple space-to-wavelength encoded light pulses.
- Yongjin Na
- Hyunsoo Kwak
- Jungwon Kim
ArticleOpen Access15 Feb 2023 Light: Science & Applications
Polarization-sensitive intensity diffraction tomography

The three-dimensional (3D) distribution of isotropic and anisotropic properties of multi-scattering objects can be effectively encoded into multiple intensity images at different input polarization states and illumination angles. Polarization-sensitive intensity diffraction tomography (PS-IDT) has demonstrated the tomographic reconstruction of 3D multiple scattering objects with fully or partially distributed anisotropy structures using vectorial multi-slice beam propagation forward model and optimization approach from captured phaseless measurements.
- Seungri Song
- Jeongsoo Kim
- Chulmin Joo
ArticleOpen Access18 May 2023 Light: Science & Applications
Deep-learning-based gas identification by time-variant illumination of a single micro-LED-embedded gas sensor

In this study, a novel sensing strategy to identify gas species selectively and to estimate the concentrations of multiple gases was proposed. Highly sensitive gold NPs coated GLAD In₂O₃ was used as a gas-sensing material, and time-variant pseudorandom illumination of a single monolithic micro-LED (μLED) photoactivated (μLP) gas sensor was applied. Transient sensor signals, owing to the rapid changes in the light intensity of μLED and different reaction kinetics of various gas species, facilitate the identification of gas species. A deep convolutional neural network (CNN) was used to effectively analyze the complex frequency spectrogram of the transient sensor signals. As such, the identification of four mono-gas environments and binary gas mixtures (mixed ethanol and methanol) were successfully demonstrated with high accuracy. The total power consumption of the μLP was only 0.53 mW, one-hundredth of the conventional electronic nose (e-nose) system. Therefore, the proposed method may significantly improve the efficiency of e-nose technology in terms of cost, space, and power consumption.
- Incheol Cho
- Kichul Lee
- Inkyu Park
ArticleOpen Access18 Apr 2023 Light: Science & Applications
Structurally engineered colloidal quantum dot phosphor using TiO₂ photonic crystal backbone

Two-dimensional photonic crystal phosphor is upgraded in terms of both material and structure, which results in ~7 times enhanced color conversion efficiency compared with reference phosphor.
- Hansol Lee
- Tae-Yun Lee
- Heonsu Jeon
ArticleOpen Access1 Nov 2022 Light: Science & Applications
Fabrication of practical deformable displays: advances and challenges

This review article analyzes the current state of the 2D and 3D deformable displays and discusses the technological challenges to be achieved for practical uses and industrial commercialization.
- Dong Wook Kim
- Seong Won Kim
- Unyong Jeong
Review ArticleOpen Access4 Mar 2023 Light: Science & Applications
Integrated metasurfaces for re-envisioning a near-future disruptive optical platform

We organize integrated metasurfaces with conventional devices (LED, LC, MEMS, etc.), and their potential applications in VR/AR, LiDAR, and sensors.
- Younghwan Yang
- Junhwa Seong
- Junsuk Rho
Review ArticleOpen Access20 Jun 2023 Light: Science & Applications
One-step printable platform for high-efficiency metasurfaces down to the deep-ultraviolet region

Facile nanostamping of the high-refractive index nanoparticle-embedded-resin for the direct fabrication of highly efficient metaholographic devices down to the deep-ultraviolet region.
- Joohoon Kim
- Wonjoong Kim
- Junsuk Rho
ArticleOpen Access8 Mar 2023 Light: Science & Applications
Photonic structures in radiative cooling
- Minjae Lee
- Gwansik Kim
- Seung Hwan Ko
Review ArticleOpen Access1 Jun 2023 Light: Science & Applications
Two-dimensional Dirac plasmon-polaritons in graphene, 3D topological insulator and hybrid systems

Graphene and topological insulators are promising platforms for near-field nanotechnology on a subwavelength scale. Authors present the highly confined nature of Dirac plasmon-polaritons in graphene, topological insulator, and hybrid systems.
- Chihun In
- Un Jeong Kim
- Hyunyong Choi
Review ArticleOpen Access27 Oct 2022 Light: Science & Applications
Non-Hermitian chiral degeneracy of gated graphene metasurfaces

We report the precise real-time probing of chiral exceptional points with an electrical and spectral method and the consequences of chiral mode collapsing by an active platform of hybridised non-Hermitian metasurfaces with gated graphene microribbons.
- Soojeong Baek
- Sang Hyun Park
- Teun-Teun Kim
ArticleOpen Access6 Apr 2023 Light: Science & Applications
Ultra-thin light-weight laser-induced-graphene (LIG) diffractive optics

We present how direct-laser-writing can be utilized to fabricate ultra-thin light-weight planar diffractive optics with graphene as the base material. (Inset scale bar: 1 mm).
- Younggeun Lee
- Mun Ji Low
- Young-Jin Kim
Review ArticleOpen Access15 Jun 2023 Light: Science & Applications
High-index-contrast photonic structures: a versatile platform for photon manipulation

This paper reviews the fabrication and functionalities of high-refractive-index-contrast optical structures that can serve as versatile optical platforms to address the limitations of current optoelectronic devices.
- Young-Bin Kim
- Jin-Woo Cho
- Sun-Kyung Kim
Review ArticleOpen Access1 Nov 2022 Light: Science & Applications

Special Issue on Optics and Photonics Research in Korea

Content

Building an optics and photonics research ecosystem in South Korea: Collaborative innovation between academia and industry

Controlled afterglow luminescent particles for photochemical tissue bonding

Deep learning acceleration of multiscale superresolution localization photoacoustic imaging

Rapid species identification of pathogenic bacteria from a minute quantity exploiting three-dimensional quantitative phase imaging and artificial neural network

Geometric-phase intraocular lenses with multifocality

Massively parallel electro-optic sampling of space-encoded optical pulses for ultrafast multi-dimensional imaging

Polarization-sensitive intensity diffraction tomography

Deep-learning-based gas identification by time-variant illumination of a single micro-LED-embedded gas sensor

Structurally engineered colloidal quantum dot phosphor using TiO₂ photonic crystal backbone

Fabrication of practical deformable displays: advances and challenges

Integrated metasurfaces for re-envisioning a near-future disruptive optical platform

One-step printable platform for high-efficiency metasurfaces down to the deep-ultraviolet region

Photonic structures in radiative cooling

Two-dimensional Dirac plasmon-polaritons in graphene, 3D topological insulator and hybrid systems

Non-Hermitian chiral degeneracy of gated graphene metasurfaces

Ultra-thin light-weight laser-induced-graphene (LIG) diffractive optics

High-index-contrast photonic structures: a versatile platform for photon manipulation

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