Nature Search

Ultrafast coherent nonlinear nanooptics and nanoimaging of graphene

Ultrafast nanoimaging reveals the origin of the nonlinear optical properties of graphene.

Tao Jiang
Vasily Kravtsov
Markus B. Raschke
Research05 Aug 2019
Nature Nanotechnology

Volume: 14, P: 838-843
Plasmonic nanofocused four-wave mixing for femtosecond near-field imaging

Focusing plasmon polaritons at the apex of a nanometre tip leads to the generation of an intense third-order nonlinear response used as a local probe for ultrafast nanoimaging.

Vasily Kravtsov
Ronald Ulbricht
Markus B. Raschke
Research08 Feb 2016
Nature Nanotechnology

Volume: 11, P: 459-464
Photoluminescence imaging of single photon emitters within nanoscale strain profiles in monolayer WSe₂

Here, the authors correlate the position and spectral emission properties of single photon emitters in monolayer WSe₂ with the surrounding local strain potential by combining deep-subwavelength photoluminescence imaging and atomic force microscopy, providing insights on the microscopic mechanisms behind the formation of the quantum emitters.

Artem N. Abramov
Igor Y. Chestnov
Vasily Kravtsov
ResearchOpen Access15 Sept 2023
Nature Communications

Volume: 14, P: 1-7
High momentum two-dimensional propagation of emitted photoluminescence coupled with surface lattice resonance

We achieve a 2D plasmon-enhanced photoluminescence and long-range surface propagation of it via surface lattice resonance (SLR) in a vdWM-Au slot lattice.

Yeonjeong Koo
Dong Kyo Oh
Kyoung-Duck Park
ResearchOpen Access20 Jun 2025
Light: Science & Applications

Volume: 14, P: 1-9
Quantum tunneling high-speed nano-excitonic modulator

High-speed electrical modulation of the excitonic properties of 2D semiconductors could promote their application for optoelectronic devices. Here, the authors report the dynamic switching of neutral exciton and trion-dominant states in a MoS₂ monolayer via a quantum tunneling nanoplasmonic cavity, reaching modulation frequencies up to 8 MHz.

Hyeongwoo Lee
Sujeong Kim
Kyoung-Duck Park
ResearchOpen Access09 Oct 2024
Nature Communications

Volume: 15, P: 1-7
Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity

We demonstrate an all-round dynamic control of intra- and inter-layer excitonic processes and interconversion between IX and IX− in a WSe₂/Mo_0.5 W_0.5 Se₂ heterobilayer with <20 nm spatial resolution, achieved by multifunctional tip-enhanced photoluminescence (TEPL) spectroscopy and imaging.

Yeonjeong Koo
Hyeongwoo Lee
Kyoung-Duck Park
ResearchOpen Access03 Mar 2023
Light: Science & Applications

Volume: 12, P: 1-10
Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum

Vasily Kravtsov
Ekaterina Khestanova
Ivan V. Iorsh
ResearchOpen Access09 Apr 2020
Light: Science & Applications

Volume: 9, P: 1-8
Dynamical control of nanoscale light-matter interactions in low-dimensional quantum materials

We discuss the recent progress on the dynamic control of tip-induced light-matter interactions, especially for the low dimensional quantum materials. This review is divided into three parts based on the type of tip-induced control, i.e., gap control of tip-cavity, tip-pressure control, and near-field polarization control.

Yeonjeong Koo
Taeyoung Moon
Kyoung-Duck Park
ReviewsOpen Access25 Jan 2024
Light: Science & Applications

Volume: 13, P: 1-18
Chemical and stellar properties of early-type dwarf galaxies around the Milky Way

This review summarizes our understanding of early-type dwarfs, which are the end-points of the evolution of low-mass galaxies. Their primeval stellar populations provide a unique laboratory for studying the physical conditions on small scales at epochs beyond z = 2.

Vasily Belokurov
N. Wyn Evans
Reviews01 Aug 2022
Nature Astronomy

Volume: 6, P: 911-922

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