Korea Institute of Science and Technology

Yong-Won Song

Jae-Min Hong

Jinseok Kim

Sungjae Lee

Jung Ah Lim

Ockchul Kim

Md Siam Uddin

Jinwoo Jeong

Hak-Sung Kim

Il Doo Kim

Hyungdal Park

Jaehyun Park

Hyun Seok Lee

Chong Yun Kang

Ji-Won Choi

Sang Tae Kim

Jin Sang Kim

Seong Keun Kim

Seung Hyub Baek

Won-Kook Choi

Hyunjung Yi

Won-suk Choi

Ho-Gi Kim

Hyowon Moon

Seong-Ji Kwon

Yong-Ju Jung

Pulak Chandra Debnath

Dae Seong Eom

Dong Youn Yoo

Hee-Suk Kim

Hee-Dok Choi

Won-Suk Han

Tae Seon Hyun

Bowon Ryu

Embodiments relate to an optical sensor for sensing hydrogen gas, which includes an optical fiber through which light moves; a ferrule formed at one end of the optical fiber to surround the optical fiber; and a sensor module configured to form an interference wave according to a Fabry-Perot interferometer with respect to light that moves through the optical fiber, wherein the sensor module includes a sensing material that expands and contracts by reacting with hydrogen gas, and spectrum periodicity of the interference wave changes according to a volume change of the sensing material, and a hydrogen gas detection system including the optical sensor.

Optical sensor for sensing hydrogen gas and hydrogen gas detection system including the same

Embodiments relate to a resonator including a graphene layer formed on a support, and a tapered fiber disposed around at least part of the support, close to the graphene layer, wherein the tapered fiber has different paths along which light travels in a region extending from one end and a region extending from the other end, and a passive-mode-locked pulse laser oscillation system including the same.

System for generating passive-mode-locked pulse laser at high repetition rate

Disclosed herein is a smart wearable lens mounted with an all-solid-state thin film secondary battery including a flexible substrate, a cathode current collector, a cathode, a solid electrolyte, an anode, and an anode current collector. The smart wearable lens mounted with the all-solid-state thin film secondary battery may be stably and continuously supplied with power and has a low self-discharge rate. In addition, the smart wearable lens may minimize aversion when humans are wearing the smart wearable lens and be suitably used for a curved lens, especially a micro-lens such as a contact lens.

Smart wearable lens mounted with all-solid-state thin film secondary battery and method for manufacturing the same

Embodiments relate to a polymer waveguide including a substrate, a cladding layer made of a first polymer, formed on the substrate, wherein a first monomer is polymerized into the first polymer, and the cladding layer has a groove for the waveguide by removing part of the cladding layer, and a core accommodating graphene therein, formed on the groove, a method for manufacturing the same, and a passively mode-locked laser based on the polymer waveguide.

Polymer waveguide accommodating dispersed graphene and method for manufacturing the same, and laser based on the polymer waveguide

Provided is a smart contact lens for non-invasive drug delivery including a platform configured to be worn on an eye, a reservoir installed within the platform, and having a receiving part in which a drug is received, to provide the eye with the drug, an electrode for iontophoresis installed in the reservoir to make iontophoresis work, to provide the eye with the drug from the reservoir, and an activation chip electrically connected to the electrode for iontophoresis to activate iontophoresis.

Smart contact lens for non-invasive drug delivery

Embodiments relate to a noise suppressor for suppressing noise of an optical signal, including a core through which the optical signal travels, a clad that is wrapped around the core and configured to expose part of the core, and a graphene layer formed on the part of the core, and a digital optical signal generation system including the same.

Optical device for suppressing noise of laser using graphene

A tear collection device comprises: a body attached to an eyeball; a tear inlet for allowing tear to flow into the body; a storing space formed inside the body and capable of storing the tears having flowed into the body; and a pump forming a pressure difference inside the body such that tears flow into the body through the tear inlet, wherein the pump is driven by using, as power, eye blinking movements of a wearer so as to form the pressure difference inside the body, thereby allowing the tears to flow into the body.

Tear collection device

A method for directly synthesizing graphene on a surface of a target object includes: forming a non-metal layer on a support substrate; disposing the target object in a space above the support substrate, which is opposite to the non-metal layer; and injecting a carbon precursor to form graphene on the surface of the target object to synthesize a graphene film, wherein the graphene is nucleated and grown by a decomposition of the carbon precursor, the carbon precursor is decomposed by heat with catalytic assistance from the non-metal layer, and a carbon atom from the decomposition of the precursor is anchored on the surface to form the graphene film.

Method for directly synthesizing graphene on surface of target object and device including graphene prepared using the method

Embodiments are directed to a method for manufacturing a graphene electro-optic modulator, which is freely attachable to and detachable from an optical waveguide and modulates a light according to an electric signal. The method includes: forming two metal electrodes on an oxide film formed on a substrate, the two metal electrodes being spaced apart from each other; synthesizing a first graphene film at a metal foil; coating the first graphene film with a polymer membrane; removing the metal foil at which the first graphene film is synthesized; and transferring the first graphene film coated with the polymer membrane onto the oxide film, wherein the first graphene film is electrically connected to any one of the two metal electrodes. There is also provided a graphene electro-optic modulator manufactured by the method.

Physically contactable graphene electro-optic modulator and method for manufacturing the same

A method for in situ synthesis of graphene along a lengthwise direction of a waveguide applied to a photonic device includes processing an evanescent field of laser propagating in the waveguide to spread outward the waveguide, depositing a nickel thin film on a surface of the waveguide, growing graphene between a surface of the waveguide and a nickel thin film by irradiating telecommunication laser to a core of the waveguide, and removing the nickel thin film from the waveguide. Accordingly, graphene with high optical nonlinearity is in situ synthesized in the photonic device.

Method for Synthesis of graphene along waveguides in situ, photonics device including graphene obtained using the method

A contact lens for collecting tear or delivering a drug includes an inner lens placed on an eyeball, an outer lens provided at an outer side of the inner lens to overlap the inner lens, and a plurality of pillars disposed between the inner lens and the outer lens to form a space between the inner lens and the outer lens, wherein the contact lens has a plurality of interfacing ports for connecting a chamber with an outside of the contact lens.

Contact lens for collecting tear or delivering drug, and method for manufacturing the contact lens

A sensor assembly has a flexible body, and a plurality of fiber Bragg gratings (FBG) sensor inserted into the body, the FBG sensor includes an optical fiber extending in a length direction of the body and a plurality of lattices disposed in the optical fiber, a variation of a wavelength spectrum of light, caused by a variation of an interval of the plurality of lattices, is detected, and at least one of force information applied to the body and temperature information of the body is extracted together with refraction information of the body.

Multi-functional sensor assembly

Disclosed is an ultrafast optical switching device based on black phosphorus, including a first channel to generate a first laser which is a continuous wave of a first wavelength, a second channel to generate a second laser which is a continuous wave of a second wavelength different from the first wavelength, a modulator to modulate the second laser generated by the second channel into a pump signal, a first and a second wavelength tunable filters to change wavelengths of the first laser and the second laser, respectively, a directional coupler to couple the first laser and the second laser, and an optical element to control the first and second lasers coupled by the directional coupler by means of nonlinearity and an evanescent field of black phosphorus. Accordingly, volume and size of an ultrafast optical switching device may be reduced, and a data processing rate may be improved.

Ultrafast optical switching device based on black phosphorus

Disclosed are amorphous carbon nanofibers including copper nanoparticles or copper alloy nanoparticles, copper composite nanoparticles prepared by grinding the amorphous carbon nanofibers and implemented as surfaces of Cu-included particles are partially or wholly coated with amorphous carbons, a dispersed solution including the copper composite nanoparticles, and preparation methods thereof and the amorphous carbon nanofibers include nanoparticles including copper, copper nanoparticles or copper alloy nanoparticles, and, the copper composite nanoparticles are implemented as surfaces of Cu-included particles are partially or wholly coated with amorphous carbons.

Carbon nanofiber including copper particles, nanoparticles, dispersed solution and preparation methods thereof

The method of manufacturing nanoparticles of a target material includes mixing graphene oxide with an aqueous solvent to prepare an aqueous solution, mixing the target material with an organic solvent to prepare an organic solution, mixing the aqueous solution with the organic solution, and preparing nanoparticles of the target material by the graphene oxide.

Growing community of inventors

Seoul, South Korea

Yong-Won Song