公开(公告)号：US20230307214A1

公开(公告)日：2023-09-28

申请号：US18114295

申请日：2023-02-27

Applicant: Korea Institute of Science and Technology ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Ho Joong JUNG ,  Sang Wook HAN ,  Hyung Jun HEO ,  Hansuek LEE ,  Min Kyo SEO ,  Hyeon HWANG

IPC: H01J37/32 ,  G03F7/20 ,  B08B3/08

CPC classification number: H01J37/32825 ,  H01J37/32449 ,  G03F7/2026 ,  B08B3/08 ,  H01J2237/182 ,  H01J2237/3343 ,  H01J2237/3321 ,  H01J37/3266 ,  H01J2237/022

Abstract: The present invention relates to a method for etching lithium niobate, the method including a process of etching lithium niobate using a mask pattern as a physical dry etching method using Ar plasma produced in a chamber through Ar gas, wherein in the process of etching lithium niobate, a process pressure of the chamber is maintained at 1 mTorr to 20 mTorr, and a method for forming a lithium niobate pattern using the same.

公开(公告)号：US20230194953A1

公开(公告)日：2023-06-22

申请号：US17956337

申请日：2022-09-29

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kayoung KIM ,  Chulki KIM ,  Jae Hun KIM ,  Taikjin LEE ,  Sang Wook HAN ,  Seungwoo JEON ,  Yu Kyeong KIM ,  Young Tae BYUN

IPC: G02F1/355 ,  G02F1/35 ,  G02F1/361

CPC classification number: G02F1/3551 ,  G02F1/3501 ,  G02F1/3615

Abstract: One aspect of the present disclosure is a method for selective surface functionalization using a single-photon source. The method for selective functionalization using a single-photon source includes: (a) adding a single-photon source to a solution containing a photosensitizer and a monomer; and (b) emitting a single photon from the single-photon source. One aspect of the present disclosure is a selectively functionalized single-photon source prepared by the method.

公开(公告)号：US20200287714A1

公开(公告)日：2020-09-10

申请号：US16739526

申请日：2020-01-10

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sang Wook HAN ,  Sung Wook MOON ,  Yong Su KIM ,  Sang Yun LEE ,  Young Wook CHO ,  Min Sung KANG ,  Ji Woong CHOI

IPC: H04L9/08

Abstract: This specification discloses a quantum public-key cryptosystem. The quantum public-key cryptosystem may use two rotation operators R{circumflex over (n)}(θ) and R{circumflex over (m)}(φ) satisfying a cyclic evolution. The two rotation operators R{circumflex over (n)}(θ) and R{circumflex over (m)}(φ) do not have a commutation relation or an anti-commutation relation with each other. The commutation relation or the anti-commutation relation is established when either of the following conditions is satisfied: θ=2iπ, φ=2jπ, or {circumflex over (n)}·{circumflex over (m)}=1 (i, j=integer), and θ=(2k+1)π, φ=(2l+1)π, or {circumflex over (n)}·{circumflex over (m)}=0 (k, l=integer).

公开(公告)号：US20170155499A1

公开(公告)日：2017-06-01

申请号：US15357424

申请日：2016-11-21

Applicant: Korea Institute of Science and Technology

Inventor： Sang Wook HAN ,  Sung Wook MOON ,  Yong Su KIM ,  Min Ki WOO

IPC: H04L7/00 ,  H04L9/08 ,  H04B10/548 ,  H04J14/06 ,  H04J14/02

CPC classification number: H04L7/0075 ,  H04B10/70 ,  H04B10/85 ,  H04L9/0852 ,  H04L9/0858

Abstract: Disclosed is a communication apparatus including a synchronization signal detector configured to detect a synchronization signal received from other communication apparatus coupled to the communication apparatus, wherein the other communication apparatus sends a quantum signal generated by a first light source to the communication apparatus, and a second light source configured to generate a decoy signal to be added to a quantum signal that is to be sent to the other communication apparatus according to a result of the detection of the synchronization signal.

公开(公告)号：US20170099139A1

公开(公告)日：2017-04-06

申请号：US15176428

申请日：2016-06-08

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sang Wook HAN ,  Sung Wook MOON ,  Yong-Su KIM ,  Il Young KIM ,  Byungkwon PARK

IPC: H04L9/08

CPC classification number: H04L9/0852 ,  B82Y20/00 ,  H04B10/70 ,  H04L9/0858

Abstract: Disclosed is a method for stabilizing a quantum cryptography system, which includes: determining whether the quantum cryptography system operates in a stabilized state, on the basis of a bit error rate or a key rate of the quantum cryptography system; and readjusting an arrival time of a gate pulse or a laser operation time so that an arrival time of a single photon for a photon detector is aligned with the arrival time of the gate pulse, when the quantum cryptography system does not operate in a stabilized state. Here, the quantum cryptography system may be a two-way quantum cryptography system.

公开(公告)号：US20160359624A1

公开(公告)日：2016-12-08

申请号：US14590585

申请日：2015-01-06

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Su KIM ,  Sang Wook HAN ,  Sung Wook MOON ,  Yujun CHOI

IPC: H04L9/08 ,  H04B10/70

CPC classification number: H04L9/0855 ,  H04B10/70 ,  H04L2209/34

Abstract: An apparatus for quantum cryptographic communication includes a light source configured to generate an optical pulse which is transmitted to a plurality of quantum code sending devices, and a quantum entanglement measuring unit configured to receive the optical signal generated from each of the plurality of quantum code sending devices and measure a relation among quantum states of the optical signals received from the plurality of quantum code sending devices; the optical signal being generated by encoding a key to a quantum state of the optical pulse. The apparatus for quantum cryptographic communication may further include a signal direction determining unit, a reflector for reflecting the optical pulse or the optical signal, an arbitrary phase shifter, or a modulator for encoding a digital signal corresponding to the key to the optical pulse.

Abstract translation: 一种用于量子密码通信的装置包括：光源，被配置为产生被发送到多个量子码发送装置的光脉冲;量子纠缠测量单元，被配置为接收从所述多个量子码发送中的每一个产生的光信号 测量从多个量子码发送装置接收的光信号的量子态之间的关系; 光信号是通过将键编码为光脉冲的量子态产生的。 用于量子密码通信的装置还可以包括信号方向确定单元，用于反射光脉冲或光信号的反射器，任意移相器或用于对与光脉冲对应的键的数字信号进行编码的调制器。

公开(公告)号：US20210293999A1

公开(公告)日：2021-09-23

申请号：US16897024

申请日：2020-06-09

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sang Wook HAN ,  Seung Woo JEON ,  Sung Wook MOON ,  Yong Su KIM ,  Hyang Tag LIM ,  Ho Joong JUNG ,  Young Wook CHO

IPC: G02B3/00 ,  C09K11/65

Abstract: An inverted nanocone structure of the present disclosure includes a first surface, a second surface spaced apart from the first surface by a predetermined distance and having a greater area than the first surface, and a body having an inverted cone shape between the first surface and the second surface, wherein at least one activated point defect center is provided in the body.

公开(公告)号：US20190278567A1

公开(公告)日：2019-09-12

申请号：US16335039

申请日：2017-09-26

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sang Wook HAN ,  Sung Wook MOON ,  Yong Su KIM ,  Byung Kwon PARK

IPC: G06F7/58 ,  G06F16/51 ,  H04N5/374 ,  H04N5/372 ,  H04N5/357

Abstract: The present invention provides a random number generation system comprising: an image sensor module for outputting dark noise generated from each unit pixel region respectively that is shielded from external light as digital data; and a control unit for classifying the respective pieces of digital data output from the image sensor module, for allocating random numbers to the same using a database in which a plurality of reference values are stored for each unit pixel, and for collating the same so as to generate a first random number.