SNOM characterization of a potential low cost thin gold coated micro-structured grating using a commercial CD substrate

J. Barrio, T. P J Han, J. Lamela, C. de las Heras, G. Lifante, M. A. Sánchez-Alejo, E. Camarillo, F. Jaque

Research output: Contribution to journalArticle

Abstract

In this work near-field optical measurements of a corrugated grating coated with a 30 nm thick gold film are presented. The grating was made using the polycarbonate corrugated substrate of a commercially available recordable CD as template. This has been proved to be a versatile and low cost technique in producing large 1.6 μm period gratings. The study was carried out using a Scanning Near-Field Optical Microscope (SNOM) working in both collection and reflection modes at two different wavelengths, 532 nm and 633 nm. The results illustrate that the intensity patterns of near-field images are strongly polarization-dependent, even showing different periodicity of the localized fields for orthogonal polarization states. When electric field of the light is polarized parallel to the grooves, the periodicity of the SNOM images is coincident with the grating period, whereas when the light is polarized perpendicular to the grooves the SNOM pattern shows a periodicity twice that of the corresponding topography of the grating. Numerical simulations of the SNOM data based on a two-dimensional Finite Difference Time-Domain (2D-FDTD) model have been realized. The results of the simulations are in good agreement with the experimental data, emphasizing the need of performing numerical simulation for the correct interpretation of SNOM data.

LanguageEnglish
Pages428-431
Number of pages4
JournalRevista Mexicana de Fisica
Volume61
Issue number6
Publication statusPublished - 2015

Fingerprint

optical microscopes
near fields
gratings
gold
scanning
periodic variations
grooves
polarized light
simulation
polycarbonates
polarization
optical measurement
finite difference time domain method
topography
templates
costs
electric fields
wavelengths

Keywords

  • finite difference time domain technique (FDTD)
  • grating
  • scanning near field optical microscopy (SNOM)

Cite this

Barrio, J., Han, T. P. J., Lamela, J., de las Heras, C., Lifante, G., Sánchez-Alejo, M. A., ... Jaque, F. (2015). SNOM characterization of a potential low cost thin gold coated micro-structured grating using a commercial CD substrate. Revista Mexicana de Fisica, 61(6), 428-431.
Barrio, J. ; Han, T. P J ; Lamela, J. ; de las Heras, C. ; Lifante, G. ; Sánchez-Alejo, M. A. ; Camarillo, E. ; Jaque, F. / SNOM characterization of a potential low cost thin gold coated micro-structured grating using a commercial CD substrate. In: Revista Mexicana de Fisica. 2015 ; Vol. 61, No. 6. pp. 428-431.
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Barrio, J, Han, TPJ, Lamela, J, de las Heras, C, Lifante, G, Sánchez-Alejo, MA, Camarillo, E & Jaque, F 2015, 'SNOM characterization of a potential low cost thin gold coated micro-structured grating using a commercial CD substrate' Revista Mexicana de Fisica, vol. 61, no. 6, pp. 428-431.

SNOM characterization of a potential low cost thin gold coated micro-structured grating using a commercial CD substrate. / Barrio, J.; Han, T. P J; Lamela, J.; de las Heras, C.; Lifante, G.; Sánchez-Alejo, M. A.; Camarillo, E.; Jaque, F.

In: Revista Mexicana de Fisica, Vol. 61, No. 6, 2015, p. 428-431.

Research output: Contribution to journalArticle

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T1 - SNOM characterization of a potential low cost thin gold coated micro-structured grating using a commercial CD substrate

AU - Barrio, J.

AU - Han, T. P J

AU - Lamela, J.

AU - de las Heras, C.

AU - Lifante, G.

AU - Sánchez-Alejo, M. A.

AU - Camarillo, E.

AU - Jaque, F.

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Barrio J, Han TPJ, Lamela J, de las Heras C, Lifante G, Sánchez-Alejo MA et al. SNOM characterization of a potential low cost thin gold coated micro-structured grating using a commercial CD substrate. Revista Mexicana de Fisica. 2015;61(6):428-431.