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, cilt.41, sa.4, ss.303-313, 2017 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 41 Sayı: 4
  • Basım Tarihi: 2017
  • Doi Numarası: 10.3906/fiz-1612-15
  • Dergi Adı: TURKISH JOURNAL OF PHYSICS
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.303-313
  • Anahtar Kelimeler: Photonic crystal, electro-optic modulation, slow light, quality factor, WAVE-GUIDE, MICROCAVITIES, NANOCAVITY
  • Ankara Üniversitesi Adresli: Evet

Özet

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.