Enhanced electro-optic modulation of LiNbO3-based photonic crystal cavities with dual mode and polarization operation

BAĞCI F., Kurt G., AKAOĞLU B., ÖZBAY E.

TURKISH JOURNAL OF PHYSICS, vol.41, no.4, pp.303-313, 2017 (ESCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 4
  • Publication Date: 2017
  • Doi Number: 10.3906/fiz-1612-15
  • Journal Name: TURKISH JOURNAL OF PHYSICS
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.303-313
  • Keywords: Photonic crystal, electro-optic modulation, slow light, quality factor, WAVE-GUIDE, MICROCAVITIES, NANOCAVITY
  • Ankara University Affiliated: Yes

Abstract

A high output transmission and high quality factor, compact LiNbO3-based Fabry-Perot-type photonic crystal cavity is reported that can be used in electro-optical modulators at optical communication wavelengths. The electro-optic effect is 123 times enhanced as compared to the bulk material as a result of the slow light effect. The transmission wavelength is found to depend linearly on the applied voltage with 1.2 nm/V modulation sensitivity. Moreover, an externally switchable dual mode regime with high quality factors and transmissions is realized. High transmissions and high quality factors are also obtained for both transverse-electric and transverse-magnetic polarizations simultaneously.