Nature Search

Fast photo-carrier multiplication by engineered potential trap in MoS₂/Ge double junction phototransistor

Youngseo Park
Minhyeok Jung
Junseok Heo
ResearchOpen Access08 Jan 2026
Scientific Reports

P: 1-11
Selectively tunable optical Stark effect of anisotropic excitons in atomically thin ReS₂

The optical Stark effect is a light-matter interaction phenomenon that can be used to address and control exciton states in semiconductors. Here, the authors achieve optical tuning of the Stark effect of an individual exciton state in few-layer ReS₂with varying light polarization.

Sangwan Sim
Doeon Lee
Hyunyong Choi
ResearchOpen Access18 Nov 2016
Nature Communications

Volume: 7, P: 1-6
Writing monolithic integrated circuits on a two-dimensional semiconductor with a scanning light probe

A laser can be used to locally dope two-dimensional molybdenum ditelluride channels, allowing both n- and p-doped channels to be assembled within the same atomic plane and for device arrays of n–p–n bipolar junction transistor amplifiers and radial p–n photovoltaic cells to be fabricated.

Seung-Young Seo
Jaehyun Park
Moon-Ho Jo
Research13 Sept 2018
Nature Electronics

Volume: 1, P: 512-517
Publisher Correction: Ultrafast quantum beats of anisotropic excitons in atomically thin ReS₂

Sangwan Sim
Doeon Lee
Hyunyong Choi
Amendments and CorrectionsOpen Access22 Mar 2018
Nature Communications

Volume: 9, P: 1-2
Ultra-high modulation depth exceeding 2,400% in optically controlled topological surface plasmons

For optical control of plasmons metals require a large amount of power in the control pulse, yielding a small modulation depth. Here, Sim et al. fabricate arrays of Bi₂Se₃ and report a modulation depth of 2,400% at 1.5 THz with an optical fluence of 45 μJ/cm², demonstrating a novel route for controlling plasmons.

Sangwan Sim
Houk Jang
Hyunyong Choi
ResearchOpen Access30 Oct 2015
Nature Communications

Volume: 6, P: 1-7
Multi-branch LSTM encoded latent features with CNN-LSTM for Youtube popularity prediction

Neeti Sangwan
Vishal Bhatnagar
ResearchOpen Access20 Jan 2025
Scientific Reports

Volume: 15, P: 1-15
Ultrafast quantum beats of anisotropic excitons in atomically thin ReS₂

Quantum beats are periodic oscillations originating from the superposition of coherent quantum states. Here, the authors observe exciton quantum beats in the optical spectrum of atomically thin ReS₂, and modulate the intensity of the quantum beat signal by means of light polarisation.

Sangwan Sim
Doeon Lee
Hyunyong Choi
ResearchOpen Access24 Jan 2018
Nature Communications

Volume: 9, P: 1-7
High-throughput identification of functional regulatory SNPs in systemic lupus erythematosus

Here, the authors use SNP-seq to screen 87 lupus risk loci for functional non-coding variants. Validation at one locus identified a risk variant through which enhanced Ikaros binding amplifies expression of the interferon / NFκB regulator IKKε.

Qiang Wang
Taehyeung Kim
Peter A. Nigrovic
ResearchOpen Access09 Aug 2024
Nature Communications

Volume: 15, P: 1-12
1s-intraexcitonic dynamics in monolayer MoS₂ probed by ultrafast mid-infrared spectroscopy

Excitons—bound electron-hole pairs—in two-dimensional transition-metal dichalcogenides can exhibit a rich spectrum of excited states. Here, the authors use ultrafast mid-infrared spectroscopy to explore the dynamics of these so-called 1s-intraexcitonic transitions in monolayer molybdenum disulphide.

Soonyoung Cha
Ji Ho Sung
Hyunyong Choi
ResearchOpen Access25 Feb 2016
Nature Communications

Volume: 7, P: 1-7
Generation, transport and detection of valley-locked spin photocurrent in WSe₂–graphene–Bi₂Se₃ heterostructures

Lateral TMD–graphene–topological insulator hetero-devices enable room-temperature optoelectronic transport of the valley-locked spin polarization degree of freedom.

Soonyoung Cha
Minji Noh
Hyunyong Choi
Research23 Jul 2018
Nature Nanotechnology

Volume: 13, P: 910-914
Controllable synthesis of molybdenum tungsten disulfide alloy for vertically composition-controlled multilayer

The band gap modulation of two-dimensional transition metal dichalcogenide alloy is essential for successful applications. Here, we show a controllable synthesis of Mo_1−xW_xS₂ alloy and vertically composition-controlled Mo_1−xW_xS₂multilayer, which is promising as a photoactive material.

Jeong-Gyu Song
Gyeong Hee Ryu
Hyungjun Kim
ResearchOpen Access23 Jul 2015
Nature Communications

Volume: 6, P: 1-10
Ultrafast biexciton spectroscopy in semiconductor quantum dots: evidence for early emergence of multiple-exciton generation

Younghwan Choi
Sangwan Sim
Hyunyong Choi
ResearchOpen Access13 Nov 2013
Scientific Reports

Volume: 3, P: 1-6
Sub-picosecond, strain-tunable, polarization-selective optical switching via anisotropic exciton dynamics in quasi-1D ZrSe₃

Strain control of quasi-1D ZrSe₃ enables ultrafast, polarization-selective optical switching with enhanced selectivity and tunable switching energies.

Sang Ho Suk
Sanghee Nah
Sangwan Sim
ResearchOpen Access06 Sept 2024
Light: Science & Applications

Volume: 13, P: 1-13
Endothelial keratoplasty in the management of irido-corneal endothelial syndrome

S Chaurasia
M Ramappa
V S Sangwan
Research25 Jan 2013
Eye

Volume: 27, P: 564-566

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