An analysis of the surface-normal coupling efficiency of a metal grating coupler embedded in a Scotch tape optical waveguide

Angulo Barrios, Carlos y Canalejas Tejero, Victor (2016). An analysis of the surface-normal coupling efficiency of a metal grating coupler embedded in a Scotch tape optical waveguide. "Optics Communications", v. 382 ; pp. 477-484. ISSN 0030-4018. https://doi.org/10.1016/j.optcom.2016.08.037.

Descripción

Título: An analysis of the surface-normal coupling efficiency of a metal grating coupler embedded in a Scotch tape optical waveguide
Autor/es:
  • Angulo Barrios, Carlos
  • Canalejas Tejero, Victor
Tipo de Documento: Artículo
Título de Revista/Publicación: Optics Communications
Fecha: 2016
Volumen: 382
Materias:
Palabras Clave Informales: Micro-optical devicesDiffraction gratingsSubwavelength structuresGuided wavesPolymer waveguidesIntegrated optics devices
Escuela: Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM) (UPM)
Departamento: Tecnología Fotónica y Bioingeniería
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The coupling efficiency at normal incidence of recently demonstrated aluminum grating couplers integrated in flexible Scotch tape waveguides has been analyzed theoretically and experimentally. Finite difference time domain (FDTD) and rigorously coupled wave analysis (RCWA) methods have been used to optimize the dimensions (duty cycle and metal thickness) of Scotch tape-embedded 1D Al gratings for maximum coupling at 635 nm wavelength. Good dimension and tape refractive index tolerances are predicted. FDTD simulations reveal the incident beam width and impinging position (alignment) values that avoid rediffraction and thus maximize the coupling efficiency. A 1D Al diffraction grating integrated into a Scotch tape optical waveguide has been fabricated and characterized. The fabrication process, based on pattern transfer, has been optimized to allow complete Al grating transfer onto the Scotch tape waveguide. A maximum coupling efficiency of 20% for TM-polarized normal incidence has been measured, which is in good agreement with the theoretical predictions. The measured coupling efficiency is further increased up to 28% for TM polarization under oblique incidence. Temperature dependence measurements have been also achieved and related to the simulations results and fabrication procedure.

Más información

ID de Registro: 46379
Identificador DC: http://oa.upm.es/46379/
Identificador OAI: oai:oa.upm.es:46379
Identificador DOI: 10.1016/j.optcom.2016.08.037
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0030401816307222?via%3Dihub
Depositado por: Memoria Investigacion
Depositado el: 12 Sep 2017 16:13
Ultima Modificación: 12 Sep 2017 16:13
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