* corresponding author(s)

† co-first authorship


[23] Role of weak interlayer coupling in ultrafast exciton-exciton annihilation in two-dimensional rhenium dichalcogenides

Sangwan Sim, Doeon Lee, Jekwan Lee, Myungjun Cha, Soonyoung Cha, Wonhyeok Heo, Sungjun Cho, Wooyoung Shim, Kyusang Lee, Jinkyoung Yoo, Rohit P. Prasankumar, Hyunyong Choi*, Moon-Ho Jo*
Physical Review B 101 174309 (2020) (link)

[22] Ultrafast relaxation dynamics in bimetallic plasmonic catalysts

Sangwan Sim, Alyssa Bierlie, Philip Mantos, Steven McCrory, Rohit P. Prasankumar*, Sanchari Chowdhury*
Nanoscale 12, 10284-10291 (2020) (link)

[21] Picosecond competing dynamics of apparent semiconducting-metallic phase transition in the topological insulator Bi2Se3

Sangwan Sim, Seungmin Lee, Jisoo Moon, Chihun In, Jekwan Lee, Minji Noh, Jehyun Kim, Woosun Jang, Soonyoung Cha, Seung Young Seo, Seongshik Oh, Dohun Kim, Aloysius Soon, Moon-Ho Jo, Hyunyong Choi*

ACS Photonics 7, 3, 759-764 (2020) (link)


[20] Light polarization-controlled conversion of ultrafast coherent-incoherent exciton dynamics in few-layer ReS2.

Sangwan Sim, Doeon Lee, Jekwan Lee, Hyemin Bae, Minji Noh, Soonyoung Cha, Moon-Ho Jo, Kyusang Lee, Hyunyong Choi*

Nano Letters 19, 7464 (2019) (link)



[19] Ultrafast quantum beats of anisotropic excitons in atomically thin ReS2.

Sangwan Sim, Doeon Lee, Artur V. Trifonov, Taeyoung Kim, Soonyoung Cha, Ji Ho Sung, Sungjun Cho, Wooyoung Shim, Moon-Ho Jo*, Hyunyong Choi*

Nature Communications 9, 351 (2018) (link)

[18] Generation, transport, and detection of valley-locked spin photocurrent in WSe2-graphene-Bi2Se3 heterostructures.

Soonyoung Cha, Minji Noh, Jehyun Kim, Jangyup Son, Hyemin Bae, Doeon Lee, Hoil Kim, Jekwan Lee, Ho-Seung Shin, Sangwan Sim, Seunghoon Yang, Sooun Lee, Wooyoung Shim, Chul–Ho Lee, Moon–Ho Jo, Jun Sung Kim, Dohun Kim, Hyungyong Choi*
Nature Nanotechnology 13, 910 (2018) (link)

[17] Writing monolithic integrated circuits on a two-dimensional semiconductor with a scanning light probe

Seung-Young Seo, Jaehyun Park, Jewook Park, Kyung Song, Soonyoung Cha, Sangwan Sim, Si-Young Choi, Han Woong Yeom, Hyungyong Choi, Moon-Ho Jo*
Nature Electronics 1, 512 (2018) (link)

[16] Surface passivation and carrier collection in {110}, {100} and circular Si microwire solar cells

Yun Goo Ro, Renjie Chen, Ren Liu, Nan Li, Theodore Williamson, Jinkyoung Yoo, Sangwan Sim, Rohit P. Prasankumar, Shadi A. Dayeh*
Advanced Energy Materials 8, 1802154 (2018) (link)

[15] Control over electron-phonon interaction by Dirac plasmon engineering in the Bi2Se3 topological insulator

Chihun In, Sangwan Sim, Beom Kim, Hyemin Bae, Hyunseung Jung, Woosun Jang, Myungwoo Son, Jisoo Moon, Maryam Salehi, Seung Young Seo, Aloysius Soon, Moon-Ho Ham, Hojin Lee, Seongshik Oh, Dohun Kim, Moon-Ho Jo, Hyunyong Choi*
Nano Letters 18, 734 (2018) (link)

[14] Role of spin Hall effect in the topological side surface conduction

Jekwan Lee, Sangwan Sim, Soohyun Park, Chihun In, Seungwan Cho, Seungmin Lee, Soonyoung Cha, Sooun Lee, Hoil Kim, Jehyun Kim, Wooyoung Shim, Jun Sung Kim, Dohun Kim*, Hyunyong Choi*
ACS Photonics 5, 3347 (2018) (link)


[13] Ultrafast hot-carrier photovoltaics of type-I monolayer heterojunctions in the broad spectral ranges

Ji Ho Sung, Soonyoung Cha, Hoseok Heo, Sangwan Sim, Juho Kim, Hyunyong Choi*, Moon-Ho Jo*
ACS Photonics 4, 429 (2017) (link)

[12] Highly-sensitive, gate-tunable, room-temperature mid-infrared photodetection based on graphene-Bi2Se3 heterostructure

Jaeseok Kim, Sungjoon Park, Houk Jang, Nikesh Koirala, Jae-Bok Lee, Un Jeong Kim, Hong-Seok Lee, Young-Geun Roh, Hyangsook Lee, Sangwan Sim, Soonyoung Cha, Chihun In, Jun Park, Jekwan Lee, Minji Noh, Jisoo Moon, Maryam Salehi, Ji Ho Sung, Sang-Soo Chee, Moon-Ho Ham, Moon-Ho Jo, Seongshik Oh, Jong-Hyun Ahn, Sung Woo Hwang, Dohun Kim*, Hyunyong Choi*
ACS Photonics 4, 482 (2017) (link)


[11] Selectively tunable optical Stark effect of anisotropic excitons in atomically thin ReS2

Sangwan Sim, Doeon Lee, Minji Noh, Soonyoung Cha, Chan Ho Soh, Ji Ho Sung, Moon-Ho Jo, Hyunyong Choi*
Nature Communications 7, 13569 (2016) (link)

[10] 1s intraexcitonic dynamics in monolayer MoS2 probed by ultrafast mid-infrared spectroscopy

Soonyoung Cha, Ji Ho Sung, Sangwan Sim, Jun Park, Hoseok Heo, Moon-Ho Jo*, Hyunyong Choi*
Nature Communications 7, 10768 (2016) (link)

[9] Composition control of plasmon-phonon interaction using topological quantum-phase transition in photoexcited (Bi1-xInx)2Se3.

Sangwan Sim, Jun Park, Nikesh Koirala, Seungmin Lee, Matthew Brahlek, Jisoo Moon, Maryam Salehi, Jaeseok Kim, Soonyoung Cha, Ji Ho Sung, Moon-Ho Jo, Seongshik Oh, Hyunyong Choi*
ACS Photonics 3, 1246 (2016) (link)

[8] Comparison of hydrogen sulfide gas and sulfur powder for synthesis of molybdenum disulfide nanosheets

Jusang Park, Jeong-Gyu Song, Taejin Choi, Sangwan Sim, Hyunyong Choi, Sang Wook Han, Han-Bo-Ram Lee, Soo-Hyun Kim, Hyungjun Kim*
Current Applied Physics 16, 691 (2016) (link)


[7] Ultra-high modulation depth exceeding 2,400% in the optically-controlled topological surface plasmons

Sangwan Sim, Houk Jang, Nikesh Koirala, Matthew Brahlek, Jisoo Moon, Ji Ho Sung, Jun Park, Soonyoung Cha, Seongshik Oh, Moon-Ho Jo, Jong-Hyun Ahn, Hyunyong Choi*
Nature Communications 6, 8814 (2015) (link)

[6] Controllable synthesis of molybdenum tungsten disulfide alloy for vertically composition-controlled multilayer

Jeong-Gyu Song, Gyeong Hee Ryu, Su Jeong Lee, Sangwan Sim, Chang Wan Lee, Taejin Choi, Hanearl Jung, Youngjun Kim, Zonghoon Lee, Jae-Min Myoung, Christian Dussarrat, Clement Lansalot-Matras, Jusang Park, Hyunyong Choi, Hyungjun Kim*
Nature Communications 6, 7817 (2015) (link)

[5] Tunable Fano quantum-interference dynamics using a topological phase transition in (Bi1-xInx)2Se3

Sangwan Sim, Nikesh Koirala, Matthew Brahlek, Ji Ho Sung, Jun Park, Soonyoung Cha, Moon-Ho Jo, Seongshik Oh, Hyunyong Choi*
Physical Review B 91, 235438 (2015) (link)

[4] Counterbalanced effect of surface trap and Auger recombination on the transverse terahertz carrier dynamics in silicon nanowires

Chihun In, Jungmok Seo, Hyukho Kwon, Jeongmook Choi, Sangwan Sim, Jaeseok Kim, Taeyong Kim, Taeyoon Lee, Hyunyong Choi*
IEEE Transactions on Terahertz Science and Technology 5, 605 (2015) (link)


[3] Ultrafast terahertz dynamics of hot Dirac-electron surface scattering in the topological insulator Bi2Se3

Sangwan Sim, Matthew Brahelk, Nikesh Koirala, Soonyoung Cha, Seongshik Oh, Hyunyong Choi*
Physical Review B 89, 165137 (2014) (link)


[2] Exciton dynamics in atomically thin MoS2: interexcitonic interaction and broadening kinetics

Sangwan Sim, Jusang Park, Jeong-Gyu Song, Chihun In, Yun-Shik Lee, Hyungjun Kim*, Hyunyong Choi*
Physical Review B 88, 075434 (2013) (link)

[1] Ultrafast biexciton spectroscopy in semiconductor quantum dots: evidence for early emergence of multiple-exciton generation

Younghwan Choi, Sangwan Sim, Seong Chu Lim, Young Hee Lee, Hyunyong Choi*
Scientific Reports 3, 3206 (2013) (link)