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Symmetry Breaking & Chiral Optics

Light–matter interaction in low-dimensional quantum materials

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Pioneering Quantum Optoelectronics

At the Semiconductor & Optoelectronics Lab, we explore how light, symmetry, and electronic structure shape the behavior of quantum materials. Our mission is to uncover the physical principles behind polarization, chirality, and photo-induced transport, and to translate these insights into next-generation optoelectronic devices. We combine advanced optical spectroscopy with device-level measurements to build reliable, data-driven pathways from fundamental physics to scalable technologies.

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Research at a Glance

We investigate symmetry breaking, polarization, and chiral light–matter interactions in low-dimensional quantum materials, bridging fundamentals to device-ready platforms.


Chiral & Polarization Optics

Symmetry breaking in optical responses, from CPL to chiral photophysics.

  • Chirality-driven PL modulation
  • Polarization-resolved spectroscopy & imaging
  • Design rules for chiral light–matter interaction

2D Quantum Materials

Valley, exciton, and spin–orbit physics in low-dimensional semiconductors.

  • TMD monolayers & alloys (Mo/W-based)
  • 2D/3D perovskites and heterostructures
  • Thickness/structure-dependent electronic phases

Photo-induced Transport

Converting polarized light into electrical signals via non-centrosymmetric physics.

  • Circular photogalvanic effects (CPGE)
  • Spatial photocurrent mapping (device-level)
  • Chirality–transport coupling mechanisms

Spectroscopy & Device Platforms

Reliable, quantitative measurement systems that connect fundamentals to applications.

  • PL/Raman/SHG/TRPL, polarization control
  • k-space/BFP imaging and angular optics
  • Data-driven characterization workflows

Research Highlights

Selected featured publications and highlighted results from the lab.

  • Materials Today Physics 54, 101730 (2025)

    Materials Today Physics 54, 101730 (2025)

    Circular photogalvanic effect in two-dimensional Weyl semimetals ABSTRACT As a host of massless Weyl fermions, two-dimensional… Read more →

  • Adv. Mater. 27, 2614–262 (2015)

    Adv. Mater. 27, 2614–262 (2015)

    Graphene/Si-quantum-dot heterojunction diodes showing high photosensitivity compatible with quantum size effect We demonstrate quantum size effect… Read more →

  • ACS Nano 6, 8203 (2012)

    ACS Nano 6, 8203 (2012)

    For the application of graphene quantum dots (GQDs) to optoelectronic nanodevices, it is of critical importance… Read more →

2026

Achiral two-dimensional perovskite exhibiting giant circularly polarized luminescence and circular photogalvanic effect.

Our group explores symmetry breaking, chiral optics, and quantum optoelectronics

FACILITIES

Key measurement platforms for chiral optics and quantum optoelectronics.

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Equipment list →

Optical Spectroscopy

Polarization-resolved PL / Raman / TRPL

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k speca pl

K-space & Chiroptics

k-space PL / SHG

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close up macro photography of a semiconductor wafe 1768828648064

Device & Transport

I-V, Photocurrent

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