Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources

Torcal-Milla, Francisco José; Sanchez‐Brea, Luis Miguel

doi:10.1016/j.ijleo.2021.168326

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…In [5] we demonstrated that MHCG prepared in polymer material with a refractive index lower than 1.75 could achieve high enough power reflectance for the applications in resonant cavity enhanced photodetectors and light emitting diodes. Due to the periodic modulation of grating stripes, diffraction orders at the far field and self-images at the near field can be observed, which is called the Talbot effect [6]. It consists of the replication of the grating intensity pattern at periodical distances from the grating plane given by z = 2a 2 /λ, where a represents the grating period and λ is the illumination wavelength.…”

Section: Introductionmentioning

confidence: 99%

Talbot self-imaging effect on the MHCG characterized by NSOM

Jandura

Pudiš²,

Czyszanowski³

2022

22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics

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In this paper, the design and preparation of polymer based monolithic high-contrast grating (MHCG) structures and their Talbot self-imaging effect are presented. For the preparation of MHCG structures to IP-Dip negative photoresist material, 3D laser lithography was used. The shape and morphological properties of the prepared MHCG structure were investigated by scanning electron microscope (SEM). Finally, the highly resolved near-field scanning optical microscope (NSOM) for the vertical optical field distribution over the grating structure was used. The demonstration of the Talbot effect for different wavelengths in a diffraction and a subwavelength regime is presented theoretically and experimentally from NSOM measurements.

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Section: Introductionmentioning

confidence: 99%