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We experimentally produce extreme-ultraviolet vector beams — from radially to azimuthally polarized — through high-order harmonic generation. Our simulations predict the generation of unique spatio-temporal structures in the form of attosecond vector beams.
The study of light beams carrying integer orbital angular momentum (OAM) has become ubiquitous during the last two decades because of their unique capability to harness light matter-interaction with applications in different fields such as optical communications, super-resolution imaging, and quantum optics [1]. Alternatively, light beams carrying non-integer OAM have also recently been demonstrated...
Vector beams are light beams with spatially variant polarization [1]. During the last decade vector beams have become an indispensable tool in many areas of science and technology such as optical trapping, quantum memories, and quantum optics. In particular, radially and azimuthally polarized light beams are the paradigm of vector beams. Radial vector beams are especially interesting due to the non-vanishing...
In 1832 Hamilton predicted that a collimated light beam propagating through a biaxial crystal parallel to one of its optical axes refracts as a slanted cone within the crystal and emerges as a hollow light cylinder, this optical effect being named as conical refraction (CR). The diffractive solution of CR presented by Belsky and Khapalyuk in 1978 and the corresponding re‐formulation carried out by...
We propose using the phenomenon of conical refraction occurring in optical biaxial crystals to design a protocol for polarization de-multiplexing and multiplexing to increase the channel capacity for free space optical communication applications. The proposed technique is based on the forward-backward optical transform occurring when a light beam propagates consecutively along the optic axes of two...
We present two optical arrangements for the implementation of polarimeters based on the conical refraction phenomenon, occurring on biaxial crystals (BC). The proposed set-ups keep all the benefits related to BC based polarimeters, but decrease costs and complexity when compared with existing alternatives. Whereas one of the proposals allows us to perform linear polarization metrology, the second...
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