Light spectral filtering based on spatial adiabatic passage

Ricard Menchon-Enrich; Andreu Llobera; Jordi Vila-Planas; Víctor J Cadarso; Jordi Mompart; Veronica Ahufinger

doi:10.1038/lsa.2013.46

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Light spectral filtering based on spatial adiabatic passage

Original Articles

- Light spectral filtering based on spatial adiabatic passage
- Light: Science & Applications Vol. 2, Issue 3-4, (2013)
- Affiliations：
  
  1.Department of Physics, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain
  2.Chemical Transducers Group, Institut de Microelectrònica de Barcelona (IMB-CNM, CSIC), E-08193 Bellaterra, Barcelona, Spain
  3.Microsystems Laboratory (LMIS1), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Author bio：
  
  R Menchon-Enrich, Department of Physics, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain E-mail: ricard.menchon@uab.cat
- Funds：
- DOI：10.1038/lsa.2013.46
  CLC：
- Published：2013-12，
  
  Published Online：16 August 2013，
  
  Received：26 October 2012，
  
  Revised：23 January 2013，
  
  Accepted：28 January 2013
- Accepted：
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Menchon-Enrich, R. et al. Light spectral filtering based on spatial adiabatic passage. Light: Science & Applications, 2, e90 (2013).
DOI：

Menchon-Enrich, R. et al. Light spectral filtering based on spatial adiabatic passage. Light: Science & Applications, 2, e90 (2013). DOI： 10.1038/lsa.2013.46.

摘要

Abstract

We present the first experimental realization of a light spectral filter based on the spatial adiabatic passage technique. We demonstrate that a fully integrable CMOS-compatible system of three coupled identical total internal reflection silicon oxide waveguides with variable separation along their propagation direction can be used simultaneously as a low- and high-pass spectral filter within the visible range of wavelengths. Light is injected into the right waveguide

and after propagating along the system

long wavelengths are transferred into the left output

whereas short wavelengths propagate to the right and central outputs. The stopband reaches values up to −11 dB for the left output and approximately −20 dB for the right plus central outputs. The passband values are close to 0 dB for both cases. We also demonstrate that the filtering characteristics of the device can be controlled by modifying the parameter values

which define the geometry of the triple-waveguide system. However

the general filtering behavior of the system does not critically depend on technological variations. Thus

the spatial adiabatic passage filtering approach constitutes an alternative to other integrated filtering devices

such as interference or absorbance-based filters.

关键词

Keywords

CMOS-compatible technologyintegrated optics devicesspatial adiabatic passagewavelength filtering devices

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