visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
장소 CAPP Seminar Room #C303, Creation Hall (3F), KAIST Munji Campus 
일시 October 15, 2020 (Thursday 
연사 Prof. Gil-Ho Lee (POSTECH) 

Seminar Invitation (October 15, 2020), 4 PM

 

Speaker: Prof. Gil-Ho Lee (POSTECH)

 

Date: October 15, 2020 (Thursday)

 

Time: 4:00 PM

 

Venue: CAPP Seminar Room #C303, Creation Hall (3F), KAIST Munji Campus

 

 

Topic: Graphene-based Josephson junction microwave bolometer

 

Abstract:

 

 

Sensitive microwave detectors are critical instruments in radioastronomy, dark matter axion searches, and superconducting quantum information science. The conventional strategy towards higher-sensitivity bolometry is to nanofabricate an ever-smaller device to augment the thermal response. However, this direction is increasingly more difficult to obtain efficient photon coupling and maintain the material properties in a device with a large surface-to-volume ratio. Here we advance this concept to an ultimately thin bolometric sensor based on monolayer graphene. To utilize its minute electronic specific heat and thermal conductivity, we develop a superconductor-graphene-superconductor (SGS) Josephson junction bolometer embedded in a microwave resonator of resonance frequency 7.9 GHz with over 99% coupling efficiency. From the dependence of the Josephson switching current on the operating temperature, charge density, input power, and frequency, we demonstrate a noise equivalent power (NEP) of 7×10-19 W/Hz1/2, corresponding to an energy resolution of one single-photon at 32 GHz and reaching the fundamental limit imposed by the intrinsic thermal fluctuation at 0.19 K.

 

번호 일시 장소 연사 제목
공지 Sep.22 2022  E6-1 #1323    2022 가을학기 응집물리 및 광학 세미나 전체 일정
183 2015/09/15-12/08  E6, 1501  박제근 교수(서울대 물리학과) 외12명  Physics Colloquium : 2014 Fall file
182 2014/03/10-06/09  E6, 1501  신용일교수(서울대)  Physics Colloquium : 2014 Spring file
181 2013/09/09-12/09  E6, 1501  박혁규교수(부산대) 외  Physics Colloquium : 2013 Fall
180 2013/03/11-06/10  E6, 1501  강명수교수(KAIST) 외  Physics Colloquium : 2013 Spring
179 2012/04/02, 4PM  E6, 1501  Yong Hee Jeong  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
178 2012/02/13-05/14  E6, 1501  Kenji Ohmori (Photo-Molecular Science, IMS)  Physics Colloquium : 2012 Spring
177 2011/09/03-12/06  E6, 1501  김용균교수(한양대) 외  Physics Colloquium : 2011 Fall file
176 2011/05/16, 4PM  E6, 1501  서민교교수(KAIST)  Photonics with surface plasmon polaritons
175 2010/02/14-05/09  E6, 1501  황철주(주성엔지니어링 사장) 외  Physics Colloquium - 2011 Spring file
174 2010/09/06-12/06  E6, 1501  조호진기자(조선일보) 외  Physics Colloquium : 2010 Fall file
173 2010/02/08-05/03  E6, 1501  최인수교수(서울대) 외  Physics Ciolloquium : 2010 Spring file
172 2009/10/21, 4PM  E6, 1501  최석봉교수(서울대)  Interdimensional Universality of Dynamic Interfaces
171 2009/09/07-11/30  E6, 1501  이주영박사(KIAS) 외  Physics Colloquium : 2009 Fall file
170 2009/02/23-05/04  E6, 1501  안종현교수(성균관대) 외  Physics Colloquium : 2009 Spring file
169 3. 21(월),16:00  E6, #1501  이상성교수 (한국천문연구원)  Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
168 3. 28(월), 16:00  E6, #1501  이준희교수 (UNIST 에너지 및 화학공학부)  Ultimate-density atomic semiconductor via flat bands
167 3. 7(월),16:00`  E6, #1501  손석우교수 (서울대 지구환경과학부)  Climate Physics and Modelling(우리말강의)
166 3. 14(월),16:00  E6, #1501  박용근교수 (KAIST 물리학과)  Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
165 4. 11(월),16:00  E6, #1501  노재동교수 (서울시립대 물리학과)  Emergence of Statistical Mechanics in Quantum Systems
164 4. 25(월), 16:00  E6, #1501  정영욱 책임연구원 (한국원자력연구원)  Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)