Excitons in Low-dimensional Materials

Presentations

• Novel optoelectronic phenomena in supertwisted electronic and photonic crystals

  Invited-In-person · Invited

  March 17, 2026, 8:00 AM – March 17, 2026, 8:36 AM

  Publication: 1) Z. Ji, Y. Zhao, Y. Chen, Z. Zhu, Y. Wang, W. Liu, G. Modi, E. J. Mele, S. Jin and R. Agarwal, "Opto-twistronic Hall effect in a three-dimensional spiral lattice", Nature, 634, 69 (2024).
  2) S. Xu, D. Wang, and R Agarwal, "General Framework for Twisted Bilayer Photonic Crystal with Interlayer Coupling and Far-Field Response", arXiv:2509.23952 (2025)

  Presenters

  • RItesh Agarwal

    • University of Pennsylvania

  Authors

  • RItesh Agarwal

    • University of Pennsylvania

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• Ballistic transport of excitons in van der Waals heterostructure

  Oral-In-person

  March 17, 2026, 8:36 AM – March 17, 2026, 8:48 AM

  Presenters

  • Will Brunner

    • University of California, San Diego

  Authors

  • Will Brunner

    • University of California, San Diego

  • Zhiwen Zhou

    • University of California, San Diego

  • Erik Szwed

    • University of California, San Diego

  • Helin Henstridge

  • Lewis Fowler-Gerace

    • University of California, San Diego

  • Leonid Butov

    • University of California, San Diego

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• Direct probing of ultrafast interfacial charge carrier dynamics and photo-induced degradation at WS₂/Au contacts by time domain THz emission spectroscopy

  Oral-In-person

  March 17, 2026, 8:48 AM – March 17, 2026, 9:00 AM

  Presenters

  • Claudia Gollner

    • Stanford University

  Authors

  • Claudia Gollner

    • Stanford University

  • Chenyi Xia

    • Stanford University

  • Mohammad Taghinejad

    • Stanford University

  • Zhepeng Zhang

  • Fang Liu

    • Stanford University

  • Mark Brongersma

    • Stanford University

  • Andrew Mannix

    • Stanford University

  • Tony Heinz

    • Stanford University

  • Aaron Lindenberg

    • Stanford University

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• Electroluminescence in GaAs/AlGaAs single heterojunctions: 2D free exciton, H-band, and tidal effect

  Oral-In-person

  March 17, 2026, 9:00 AM – March 17, 2026, 9:12 AM

  Publication: N. Sherlekar, S.R. Harrigan, L. Tian, B. Cunard, M.C. Tam, H.S. Kim, Z.R.
  Wasilewski, J. Baugh, M. E. Reimer, F. Sfigakis. Electroluminescence in GaAs/AlGaAs
  single heterointerfaces: 2D free exciton, H-band, and tidal effect, (In preparation).

  Presenters

  • Stephen Harrigan

    • University of Waterloo

  Authors

  • Stephen Harrigan

    • University of Waterloo

  • Nachiket Sherlekar

  • Lin Tian

  • Brady Cunard

  • Yuxuan Qi

    • University of Waterloo

  • Man Chun Alan Tam

    • University of Waterloo

  • Ho Sung Kim

  • Zbigniew Wasilewski

    • University of Waterloo

  • Jonathan Baugh

    • University of Waterloo

  • Michael Reimer

  • Francois Sfigakis

    • University of Waterloo

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• Nanoscale mapping of valley polarization via chiral tip-enhanced photoluminescence

  Oral-In-person

  March 17, 2026, 9:12 AM – March 17, 2026, 9:24 AM

  Presenters

  • Jonggeun Hwang

    • Pohang Univ of Sci & Tech

  Authors

  • Jonggeun Hwang

    • Pohang Univ of Sci & Tech

  • Yeonjeong Koo

    • Pohang University of Science and Technology (POSTECH)

  • Kyoung-Duck Park

    • Pohang Univ of Sci & Tech

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• Tuning Anisotropic Optical Responses in MXenes via Topochemical Surface Modification

  Oral-In-person

  March 17, 2026, 9:24 AM – March 17, 2026, 9:36 AM

  Presenters

  • Young-Hwan Kim

    • University of Chicago

  Authors

  • Young-Hwan Kim

    • University of Chicago

  • Hui Fang

  • Zahra Fakhraai

    • University of Pennsylvania

  • Dmitri Talapin

  View abstract →

• Giant amplification of interlayer exciton flux enabled by extreme exciton localization

  Oral-In-person

  March 17, 2026, 9:36 AM – March 17, 2026, 9:48 AM

  Presenters

  • Hyeongwoo Lee

    • Pohang University of Science and Technology (POSTECH)

  Authors

  • Hyeongwoo Lee

    • Pohang University of Science and Technology (POSTECH)

  • Taeyoung Moon

    • POSTECH

  • Artem Abramov

  • Ivan Kalantaevskii

  • Huitae Joo

    • Pohang University of Science and Technology

  • Sujeong Kim

    • Pohang Univ of Sci & Tech

  • Vasily Kravtsov

  • Kyoung-Duck Park

    • Pohang Univ of Sci & Tech

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• Acoustic polarons generate quasiballistic photocurrent at room temperature

  Oral-In-person

  March 17, 2026, 9:48 AM – March 17, 2026, 10:00 AM

  Presenters

  • Yoonseo Nah

    • Columbia University

  Authors

  • Yoonseo Nah

    • Columbia University

  • John Cenker

    • University of Washington

  • Jack Tulyag

    • Columbia University

  • Haowen Su

  • Jessica Yu

  • Xavier Roy

    • Columbia University

  • Milan Delor

    • Columbia University

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• Spectroscopic signals of excitons in monolayer MnBi₂Te₄

  Oral-In-person

  March 17, 2026, 10:00 AM – March 17, 2026, 10:12 AM

  Presenters

  • Khanh Duy Nguyen

    • University of Chicago

  Authors

  • Khanh Duy Nguyen

    • University of Chicago

  • Gabriele Berruto

    • University of Chicago

  • Yunhe Bai

    • University of Chicago

  • Woojoo Lee

    • University of Chicago

  • Thomas Marchese

  • Shirley Meng

  • Shuolong Yang

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• Hyperbolic Phonon Polaritons in van der Waals magnet CrSBr

  Oral-In-person

  March 17, 2026, 10:12 AM – March 17, 2026, 10:24 AM

  Presenters

  • Yinming Shao

    • Pennsylvania State University

  Authors

  • Shizhe Zhou

  • Lukas Wehmeier

    • Brookhaven National Laboratory (BNL)

  • Swagata Acharya

    • National Renewable Energy Laboratory (NREL)

  • Daniel Chica

  • Seng Huat Lee

    • Pennsylvania State University

  • Zhiqiang Mao

    • Pennsylvania State University

  • Dmitri Basov

  • Xavier Roy

    • Columbia University

  • Mark van Schilfgaarde

  • Binghai Yan

    • Penn State University

  • Mengkun Liu

    • Stony Brook University (SUNY)

  • Yinming Shao

    • Pennsylvania State University

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• Electric-Field-Driven Trion Transport in Monolayer MoSe₂

  Oral-In-person

  March 17, 2026, 10:24 AM – March 17, 2026, 10:36 AM

  Presenters

  • FNU Bobby

    • University of Pittsburgh

  Authors

  • FNU Bobby

    • University of Pittsburgh

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• Opto-electronic Transport Measurements of Doubly Charged Excitonic Boson

  Oral-In-person

  March 17, 2026, 10:36 AM – March 17, 2026, 10:48 AM

  Publication: [1] Wan, Qiaochu, et al. "Light-Induced Electron Pairing in a Bilayer Structure." arXiv preprint arXiv:2412.06941 (2024).
  [2] Sun, Zheng, et al. "Charged bosons made of fermions in bilayer structures with strong metallic screening." Nano Letters 21.18 (2021): 7669-7675.

  Presenters

  • Daniel Vaz

    • University of Pittsburgh

  Authors

  • Daniel Vaz

    • University of Pittsburgh

  View abstract →