Nonparaxial Cartesian and azimuthally symmetric waves with concentrated wavevector and frequency spectra

Autor(es)

Corato-Zanarella, Mateus ^[1] ; Corato-Zanarella, Henrique ^[1] ; Zamboni-Rached, Michel ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Elect & Comp Engn, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Optics; v. 19, n. 11 NOV 2017.
• Citações Web of Science: 0

Resumo

In this paper, we develop a theoretical analysis to efficiently handle superpositions of waves with concentrated wavevector and frequency spectra, allowing an easy analytical description of fields with interesting transverse profiles. First, we analyze an extension of the paraxial formalism that is more suitable for superposing these types of waves, as it does not rely on the use of coordinate rotations combined with paraxial assumptions. Second, and most importantly, we leverage the obtained results to describe azimuthally symmetric waves composed of superpositions of zero-order Bessel beams with close cone angles that can be as large as desired, unlike in the paraxial formalism. Throughout the paper, examples are presented, such as Airy beams with enhanced curvatures, nonparaxial Bessel-Gauss beams and circular parabolic-Gaussian beams (which are based on the Cartesian parabolic-Gaussian beams), and experimental data illustrates interesting transverse patterns achieved by superpositions of beams propagating in different directions. (AU)

• Processo FAPESP: 15/26444-8 - Luz exótica: modelamento espaço-temporal de feixes e pulsos localizados com momento angular orbital para aplicações em fotônica, comunicações ópticas e guiamento óptico de átomos
• Beneficiário: Michel Zamboni Rached
• Modalidade de apoio: Auxílio à Pesquisa - Regular