Achromatic terahertz (THz) quarter-wave retarder is widely desired to manipulate the polarization states of broadband THz beams, which are essential for spectroscopic applications, such as circular dichroism spectroscopy and steering THz vortex beams. A retarder based on Fresnel reflection exhibits the potential for designing an achromatic THz quarter-wave retarder. However, special care should be taken to make a Fresnel retarder capable of manipulating the beam ellipticity by simply rotating its fast axis without affecting its propagation path. Hereby, we design a 4-bounce achromatic quarter-wave Fresnel rhomb retarder free of affecting beam propagation, which can easily change the input beam's ellipticity by simply rotating the retarder's fast axis.

Achromatic terahertz quarter-wave Fresnel rhomb retarder / Mou, Sen; D'Arco, Annalisa; Tomarchio, Luca; Macis, Salvatore; Petrarca, Massimo; Lupi, Stefano. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 122:24(2023). [10.1063/5.0151366]

Achromatic terahertz quarter-wave Fresnel rhomb retarder

D'Arco, Annalisa;Tomarchio, Luca;Macis, Salvatore;Petrarca, Massimo;Lupi, Stefano
2023

Abstract

Achromatic terahertz (THz) quarter-wave retarder is widely desired to manipulate the polarization states of broadband THz beams, which are essential for spectroscopic applications, such as circular dichroism spectroscopy and steering THz vortex beams. A retarder based on Fresnel reflection exhibits the potential for designing an achromatic THz quarter-wave retarder. However, special care should be taken to make a Fresnel retarder capable of manipulating the beam ellipticity by simply rotating its fast axis without affecting its propagation path. Hereby, we design a 4-bounce achromatic quarter-wave Fresnel rhomb retarder free of affecting beam propagation, which can easily change the input beam's ellipticity by simply rotating the retarder's fast axis.
2023
terahertz radiation; THz time domain spectroscopy; polarization; metamaterials; optical properties
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Achromatic terahertz quarter-wave Fresnel rhomb retarder / Mou, Sen; D'Arco, Annalisa; Tomarchio, Luca; Macis, Salvatore; Petrarca, Massimo; Lupi, Stefano. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 122:24(2023). [10.1063/5.0151366]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1684394
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