Research Overview

My research focuses on optics and photonics, particularly the design and optimization of laser cavities for structured beams. Recently, I have been working on metasurfaces optical devices, especially achromatic metalenses. My work is applying new optical elements such as metasurfaces into traditional optical system to improve the performance. The electromagnetic simulation sotfwares (MATLAB, COMSOL) and ray-based optical design sotfwares (OSLO, ZEMAX Optic Studio) are used to simulate and optimizate the system.

Fields of Interest

Metasurfaces, metalenses and diffractive optical elements.
Hybrid metalenses–refracted lenses optical system.
Wave and ray based simulation method for optical system and light field observations.
Active/adaptive laser cavity for structured beam generation.

Experience

Postdoctoral Researcher, Applied Optics Laboratory, NCKU — Achromatic metalens design in UV (September 2024–present).

Study on achromatic metalens design and chromatic aberration correction in the UV regime by applying dispersion engineering of metalenses.
Using COMSOL Multiphysics and MATLAB to model meta-atom libraries and system-level optical performance.
Use OSLO to perform ray tracing and optimization through hybrid metalens-refractive lenses optical system.

Ph.D., Physics, NCKU — Dual‑phase‑modulation digital lasers for structured beams (2020–2024).

Designed and constructed digital laser cavities integrating intra-cavity spatial light modulators (SLMs).
2. Generated and experimentally validated structured beams: vortex and vortex arrays, nondiffracting beams.
Developed MATLAB codes for mode simulations, digital holography beam analysis, and mode purity measurement.

Publications

Journal:

Ly Ly Nguyen Thi, Kuo‑Chih Chang, Shu‑Chun Chu, On‑demand generation of nondiffracting Helmholtz–Gauss laser beams, Sci Rep 15, 15025 (2025).
Ly Ly Nguyen Thi, Kuo‑Chih Chang, Shu‑Chun Chu, Dual modulation digital laser for generating vortex beams with tunable orbital angular momentum, Opt. Laser Technol. (2024).
Ly Ly Nguyen Thi, Ko‑Fan Tsai, Shu‑Chun Chu, Generating Optical Vortex Array Laser Beams of Superimposing Hermite–Gaussian Beams with a Dual–Phase Modulation Digital Laser System, Photonics 11(6):563 (2024).
Ly Ly Nguyen Thi, Shu‑Chun Chu, Generation of on-demand quasi-Mathieu beams with a controlled generation of spatial spectrum of angular Mathieu-Gauss functions with a digital laser, Opt. Express 30, 5283–5293 (2022).
Thi‑Thuy Nguyen, Te‑Hsin Chen, Ly Ly Nguyen Thi, Chin‑Chun Tsai, Polarization dependence of 133Cs 6S1/2-6P3/2-11S1/2 electromagnetically induced transparency at room temperature, Opt. Express 28, 26313–26323 (2020).

Conference:

Conference: Digital laser with two controlled resonator boundaries for generating complex structured beams, Proc. SPIE 13130 (2024).

Skills

Simulation: COMSOL (Wave Optics), OSLO, Zemax OpticStudio (Ray Optics)
Programming: MATLAB
Languages: Vietnamese (native), English (IELTS 6.5), Chinese (TOCFL B1)

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