Abstract: The quantum dot comprises a ligand which is a copolymer comprising a first repeating unit comprising at least one or more hole transporting functional groups and a second repeating unit comprising at least one or more photocrosslinking functional groups.

Abstract: A method for encryption authentication according to the present invention comprises the steps of: performing a first encryption operation by a first function using secret information; performing a second encryption operation by a second function using the result value of the first encryption operation without the secret information; and performing a third encryption operation by a third function using the result value of the first encryption operation or the result value of the second encryption operation and the secret information. Further, a method for decryption verification according to the present invention comprises the step of determining whether to output, to the decoding module, a value associated with the entire or partial value of the result value of the first encryption operation according to the result value of the third encryption operation.

Abstract: The present invention relates to an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block with a terminal hydroxyl group wherein the terminal hydroxyl group of the hydrophobic bock is substituted with a tocopherol or cholesterol group. It also relates to polymeric compositions capable of forming stable micelles in an aqueous solution, comprising the amphiphilic block copolymer and a polylactic acid derivative wherein one or more ends of the polylactic acid are covalently bound to at least one carboxyl group.

Abstract: Delivery system for bioactive agents on the basis of a polymeric drug carrier formed from compositions comprising an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block having a terminal hydroxyl group substituted with a tocopherol or cholesterol group, and a polylactic acide derivative wherein one end of the polylactic acid is covalently bound to at least one carboxyl group. The carboxyl group of the polylactic acid derivative may be fixed with a di- or trivalent metal ion, which is obtained by adding the di- or trivalent metal ion to the polymeric composition.

Abstract: The present invention relates to an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block with a terminal hydroxyl group wherein the terminal hydroxyl group of the hydrophobic bock is substituted with a tocopherol or cholesterol group. It also relates to polymeric compositions capable of forming stable micelles in an aqueous solution, comprising the amphiphilic block copolymer and a polylactic acid derivative wherein one or more ends of the polylactic acid are covalently bound to at least one carboxyl group.

Abstract: An optical coupling device for coupling light to a core of an optical waveguide device. The optical coupling device is connected to the core of the optical waveguide device at a first end and convex at a second end opposite the first. The optical coupling device includes a waveguide connecting the first and second ends of the optical coupling device, for light transmission, and a cladding surrounding the waveguide.

Abstract: A substrate for mounting an optical component such that a cylindrical lens can be passively aligned in an exact position, and a method of manufacturing the same are provided. The substrate includes a groove, which is recessed into the substrate to have a slanted sidewall; and a stopper, which is formed on the groove using a photolithographic process such that the stopper is in contact with the optical component mounted in the groove and defines a position of the optical component. The method includes forming a groove having a slanted sidewall by etching a substrate and forming a stopper, which is in contact with an optical component mounted in the groove and defines a position of the optical component, by performing a photolithographic process on the substrate having the groove.

Abstract: The present invention relates to an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block with a terminal hydroxyl group wherein the terminal hydroxyl group of the hydrophobic bock is substituted with a tocopherol or cholesterol group. It also relates to polymeric compositions capable of forming stable micelles in an aqueous solution, comprising the amphiphilic block copolymer and a polylactic acid derivative wherein one or more ends of the polylactic acid are covalently bound to at least one carboxyl group.

Abstract: A photodetector device includes a doped semiconductor substrate. A first intrinsic semiconductor material layer, a main reflector, a second intrinsic semiconductor material layer, an upper semiconductor material layer, which is doped the opposite as the substrate, are formed in succession on the semiconductor substrate. An upper electrode is formed on and electrically connected with the upper semiconductor layer, and a lower electrode is electrically connected to the semiconductor substrate. One of the intrinsic semiconductor layers is relatively thin to absorb incident light, while the other is relatively thick. The photodetector device, a p-i-n photodetector, has an I region including the intrinsic semiconductor layers with different thicknesses, and a main reflector therebetween. The thickness of the entire I region can be increased with a reduced transit distance for holes.

Abstract: An optical coupling device for coupling light to a core of an optical waveguide device. The optical coupling device is connected to the core of the optical waveguide device at a first end and convex at a second end opposite the first. The optical coupling device includes a waveguide connecting the first and second ends of the optical coupling device, for light transmission, and a cladding surrounding the waveguide.

Abstract: A substrate for mounting an optical component such that a cylindrical lens can be passively aligned in an exact position, and a method of manufacturing the same are provided. The substrate includes a groove, which is recessed into the substrate to have a slanted sidewall; and a stopper, which is formed on the groove using a photolithographic process such that the stopper is in contact with the optical component mounted in the groove and defines a position of the optical component. The method includes forming a groove having a slanted sidewall by etching a substrate and forming a stopper, which is in contact with an optical component mounted in the groove and defines a position of the optical component, by performing a photolithographic process on the substrate having the groove.

Abstract: A semiconductor light-emitting device having a resonant cavity structure for emitting light perpendicularly to the plane of an active region, and a method of manufacturing the same. A post has a window of an upper electrode and a current aperture of an oxidized layer. Resonated light is emitted through the window and the current aperture. The post is formed by a sidewall of a pre-oxidized layer included in the post is exposed, and the pre-oxidized layer is horizontally oxidized by an oxidizing process by a predetermined distance from the sidewall thereof. An oxidized portion of the pre-oxidized layer becomes a high-resistance portion, and an un-oxidized portion of the pre-oxidized layer becomes the current aperture through which a current or light passes.

Abstract: A semiconductor light-emitting device having a resonant cavity structure for emitting light perpendicularly to the plane of an active region, and a method of manufacturing the same. A post has a window of an upper electrode and a current aperture of an oxidized layer. Resonated light is emitted through the window and the current aperture. The post is formed by a sidewall of a pre-oxidized layer included in the post is exposed, and the pre-oxidized layer is horizontally oxidized by an oxidizing process by a predetermined distance from the sidewall thereof. An oxidized portion of the pre-oxidized layer becomes a high-resistance portion, and an un-oxidized portion of the pre-oxidized layer becomes the current aperture through which a current or light passes.

Abstract: A photodetector device includes a doped semiconductor substrate. A first intrinsic semiconductor material layer, a main reflector, a second intrinsic semiconductor material layer, an upper semiconductor material layer, which is doped the opposite as the substrate, are formed in succession on the semiconductor substrate. An upper electrode is formed on and electrically connected with the upper semiconductor layer, and a lower electrode is electrically connected to the semiconductor substrate. One of the intrinsic semiconductor layers is relatively thin to absorb incident light, while the other is relatively thick. The photodetector device, a p-i-n photodetector, has an I region including the intrinsic semiconductor layers with different thicknesses, and a main reflector therebetween. The thickness of the entire I region can be increased with a reduced transit distance for holes.