Low-Symmetry α-MoO3 Heterostructures for Wave Plate Applications in Visible Frequencies

Sina Abedini Dereshgi, Yea Shine Lee, Maria Cristina Larciprete, Marco Centini, Vinayak P. Dravid, Koray Aydin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Low-symmetry van der Waals materials are promising candidates for the next generation of polarization-sensitive on-chip photonics since they do not require lattice matching for growth and integration. Due to their low-symmetry crystal behavior, such materials exhibit anisotropic and polarization-dependent optical properties for a wide range of optical frequencies. Here, depolarization characteristics of orthorhombic α-MoO3 is studied in the visible range. Using polarizers and analyzers, it is demonstrated that α-MoO3 has negligible loss and that birefringence values as high as 0.15 and 0.12 at 532 nm and 633 nm, respectively, are achievable. With such a high birefringence, quarter- and half-wave plate actions are demonstrated for a 1400 nm α-MoO3 flake at green (532 nm) and red (633 nm) wavelengths, and polarizability as high as 90% is reported. Furthermore, a system of double α-MoO3 heterostructure layer is investigated that provides the possibility of tuning polarization as a function of rotation angle between the α-MoO3 layers. These findings pave the way to the promising future of on-chip photonic heterostructures and twist-optics that can dictate the polarization state of light.

Original languageEnglish (US)
JournalAdvanced Optical Materials
StateAccepted/In press - 2023


  • anisotropic crystals
  • polarization
  • twist-optics
  • van der Waals materials
  • wave plates

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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