Journal of the Optical Society of Korea

  • 제16권3호
  • /
  • Pages.299-304
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  • 2012
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  • 1226-4776(pISSN)
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  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
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Highly Angle-tolerant Spectral Filter Based on an Etalon Resonator Incorporating a High Index Cavity

  • Noh, Tae-Hui (Department of Electronic Engineering, Kwangwoon University) ;
  • Yoon, Yeo-Taek (Department of Electronic Engineering, Kwangwoon University) ;
  • Lee, Sang-Shin (Department of Electronic Engineering, Kwangwoon University) ;
  • Choi, Duk-Yong (Laser Physics Centre, Research School of Physics and Engineering, Australian National University) ;
  • Lim, Seung-Chan (Korea Elecom Inc., Research Division)
  • 투고 : 2012.05.07
  • 심사 : 2012.06.18
  • 발행 : 2012.09.25
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초록

A high angular tolerance spectral filter was realized incorporating an etalon, which consists of a $TiO_2$ cavity sandwiched between a pair of Ag/Ge mirrors. The effective angle was substantially extended thanks to the cavity's high refractive index. The device was created by embedding a 313-nm thick $TiO_2$ film in 16-nm thick Ag/Ge films through sputtering, with the Ge layer alleviating the roughness and adhesion of the Ag layer. For normal incidence, the observed center wavelength and transmission were ~900 nm and ~60%, respectively; throughout the range of $50^{\circ}$, the relative wavelength shift and transmission variation amounted to only ~0.06 and ~4%, respectively.

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참고문헌

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피인용 문헌

  1. Compact Multilayer Film Structure for Angle Insensitive Color Filtering vol.5, pp.1, 2015, https://doi.org/10.1038/srep09285
  2. Angle-tolerant linear variable color filter based on a tapered etalon vol.25, pp.3, 2017, https://doi.org/10.1364/OE.25.002153
  3. Linear variable filter enabling an enhanced wavelength gradient based on shadow-mask sputtering vol.59, pp.12, 2017, https://doi.org/10.1002/mop.30883
  4. Highly angle tolerant filter incorporating serially cascaded a-Si based etalons and its application to a compact receiver vol.21, pp.1, 2013, https://doi.org/10.1364/OE.21.001301