Hoang Long Nguyen

~Time to go to lab~

I am a postdoctoral researcher at Nanyang Technological University, Singapore, working in the 2DES@NTU group under Professor Howe-Siang Tan.

I specialize in ultrafast nonlinear optical spectroscopy, particularly coherent two-dimensional electronic spectroscopy (2DES). The technique allows us to watch dynamical processes in physics, chemistry, and biology that happen on femtosecond-to-picosecond timescales (a femtosecond is a millionth of a billionth of a second).

I received my doctoral degree in 2024 through a dual-degree program between Nanyang Technological University (Singapore) and the University of Groningen (the Netherlands). My doctoral research focused on uncovering energy transfer processes in the light-harvesting systems that enable photosynthesis in plants.

news

Jun 05, 2026	Publication on ChemPhysChem (my personal favorite)
Jan 02, 2026	Publication on JPC Letters
Mar 28, 2024	We got featured on NTU Blog
Feb 23, 2024	Publication on Science Advances

selected publications

An Implementation of General Polarization-Resolved Two-Dimensional Electronic Spectroscopy

Hoang Long Nguyen, Nelson Kim Soon Ong, Sanjib Jana, and 4 more authors

ChemPhysChem, 2026

Abs DOI Bib PDF

Two-dimensional electronic spectroscopy (2DES) is a powerful tool to study the dynamics of complex molecular systems. Polarization control in 2DES allows enhancement of selective signals, providing information about the transition dipole orientations and rotational motion. In this work, we discuss an implementation of polarization-resolved 2DES (p-2DES) in the pump-probe beam geometry that simultaneously acquires signals under parallel and perpendicular pump-probe polarizations. This approach is general, as these two sets of signals can be combined as desired to obtain 2DES spectra of various polarization schemes, such as magic angle, cross-peak specific, diagonal-peak enhancing, and anisotropy. We demonstrate the approach using (1) phthalocyanine, a molecular system with two orthogonal electronic transitions and (2) the photosynthetic light-harvesting complex II, which exhibits a highly congested spectrum with many concurrent energy transfer processes. We show how the polarization schemes can help resolve hidden spectral and kinetic features. This implementation can help to streamline the use of p-2DES and provide more insights into the structural and dynamical properties of complex systems.
@article{nguyen_implementation_2026, title = {An {Implementation} of {General} {Polarization}-{Resolved} {Two}-{Dimensional} {Electronic} {Spectroscopy}}, volume = {27}, issn = {1439-7641}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/cphc.202500903}, doi = {10.1002/cphc.202500903}, language = {en}, number = {11}, urldate = {2026-06-08}, journal = {ChemPhysChem}, author = {Nguyen, Hoang Long and Ong, Nelson Kim Soon and Jana, Sanjib and Prasad, Sachin and Do, Thanh Nhut and Caffarri, Stefano and Tan, Howe-Siang}, year = {2026}, keywords = {photosynthesis, ultrafast spectroscopy, 2D spectroscopy, energy transfer, polarization}, pages = {e202500903}, }

Directly Measuring the Connectivity between Isoenergetic Light-Harvesting Antennas in Plant Photosystem II at Physiological Temperature

Hoang Long Nguyen, Kai Zhong, Thanh Nhut Do, and 6 more authors

The Journal of Physical Chemistry Letters, Jan 2026

DOI Bib PDF

@article{nguyen_directly_2026,
  title = {Directly {{Measuring}} the {{Connectivity}} between {{Isoenergetic Light-Harvesting Antennas}} in {{Plant Photosystem II}} at {{Physiological Temperature}}},
  author = {Nguyen, Hoang Long and Zhong, Kai and Do, Thanh Nhut and Akhtar, Parveen and Lambrev, Petar H. and Jansen, Thomas L. C. and Knoester, Jasper and Caffarri, Stefano and Tan, Howe-Siang},
  year = {2026},
  month = jan,
  journal = {The Journal of Physical Chemistry Letters},
  volume = {17},
  number = {2},
  pages = {605--614},
  issn = {1948-7185, 1948-7185},
  doi = {10.1021/acs.jpclett.5c02240},
  urldate = {2026-01-25},
  copyright = {https://doi.org/10.15223/policy-029},
  langid = {english},
}

Inter-Subunit Energy Transfer Processes in a Minimal Plant Photosystem II Supercomplex

Hoang Long Nguyen, Thanh Nhut Do, Kai Zhong, and 6 more authors

Science Advances, Feb 2024

DOI Bib PDF

@article{nguyen_inter-subunit_2024,
  title = {Inter-Subunit Energy Transfer Processes in a Minimal Plant Photosystem {{II}} Supercomplex},
  author = {Nguyen, Hoang Long and Do, Thanh Nhut and Zhong, Kai and Akhtar, Parveen and Jansen, Thomas L. C. and Knoester, Jasper and Caffarri, Stefano and Lambrev, Petar and Tan, Howe-Siang},
  year = {2024},
  month = feb,
  journal = {Science Advances},
  volume = {10},
  number = {8},
  pages = {eadh0911},
  publisher = {American Association for the Advancement of Science},
  doi = {10.1126/sciadv.adh0911},
  urldate = {2024-02-24},
}