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.

Low‐symmetry α‐MoO3 heterostructures for wave plate applications in visible frequencies / Abedini Dereshgi, Sina; Lee, Yea‐shine; Larciprete, Maria Cristina; Centini, Marco; Dravid, Vinayak P.; Aydin, Koray. - In: ADVANCED OPTICAL MATERIALS. - ISSN 2195-1071. - (2023), p. 2202603. [10.1002/adom.202202603]

Low‐symmetry α‐MoO3 heterostructures for wave plate applications in visible frequencies

Larciprete, Maria Cristina
Membro del Collaboration Group
;
Centini, Marco
Membro del Collaboration Group
;
2023

Abstract

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.
2023
Multilayer; polarizer; anisotropic crystal;
01 Pubblicazione su rivista::01a Articolo in rivista
Low‐symmetry α‐MoO3 heterostructures for wave plate applications in visible frequencies / Abedini Dereshgi, Sina; Lee, Yea‐shine; Larciprete, Maria Cristina; Centini, Marco; Dravid, Vinayak P.; Aydin, Koray. - In: ADVANCED OPTICAL MATERIALS. - ISSN 2195-1071. - (2023), p. 2202603. [10.1002/adom.202202603]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1666424
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