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CMOS 이미지 센서용 실리콘 나노와이어 포토트렌지스터 설계
전현성(Hyunsung Jun),최조현(Johyeon Choi),황진영(Jinyoung Hwang) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.11
In this paper, a periodic array of phototransistors is introduced for CMOS image sensors. Each device comprises a Si nanowire (NW) of varying diameters positioned above a bipolar junction transistor (BJT). The Si NW connects directly to the BJTs base region. Si NWs with distinct diameters resonate at particular wavelengths, leading to high optical absorption at the distinct regions of the visible light spectrum, namely blue, green, or red. Upon absorption, the photocurrent from the Si NW is injected into the base region, causing the BJT to transition from cutoff to the forward active mode. The amplifying function of the transistor yields superior quantum efficiency, as corroborated by TCAD simulations.
Type-Ia Supernova in M101: Latest Results
임명신,최창수,전이슬,전현성,박원기,김지훈,이지수,박수종,백기선,김상혁,오영석,전영범,성현일,윤태석,홍주은,김도형,김두호,장민성,현민희,박근홍,양희수,정일교,이방원,Im, Myungshin,Choi, Changsu,Jeon, Yiseul,Jun, Hyunsung,Park, Won-Kee,Kim, Ji Hoon,Lee, Jisoo,Pak, Soojong,Ba 한국천문학회 2012 天文學會報 Vol.37 No.2
SN 2011fe (also known as PTF 11kly) is a Type-1a supernova that appeared in M101, 2011 August. Being only 6.4 Mpc away, this supernova has been intensively observed by various facilities in the world. We monitored this supernova in UBVRI, grizY, and ZYJHK-bands using SNUO, LOAO, SOAO, CQUEAN/McDonald, UKIRT telescopes, and small telescopes in Korea and Mongolia. The monitoring observation is still ongoing, and the light curve has been accumulated over a year. We present the results of the long-term monitoring observation, together with a light-curve fitting result. We will also discuss our findings in terms of the usefulness of Type-Ia supernovae as a distance indicator.