Tailoring slow light properties by shifting the innermost rows of holes in photonic crystal waveguides with ring-shaped holes

BAĞCI F., AKAOĞLU B.

OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS, cilt.8, sa.5-6, ss.353-358, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 8 Sayı: 5-6
  • Basım Tarihi: 2014
  • Dergi Adı: OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.353-358
  • Anahtar Kelimeler: Photonic crystal waveguide, Slow light, Group index, Plane-wave expansion method, Finite-difference time-domain method, LOW-DISPERSION, NONLINEAR ENHANCEMENT
  • Ankara Üniversitesi Adresli: Evet

Özet

A silicon ring-shaped photonic crystal waveguide embedded in silica is proposed and the effects of shifting the first and the second innermost rows towards the line-defect on slow light properties are systematically investigated by plane-wave expansion method. The first and second rows affect the slow light characteristics differently, which offers a strategy to design flatter bands. The behavior of slow light generation in ring-shaped photonic crystal waveguides against row shifting is clarified and a structural strategy for obtaining higher group index and less group velocity dispersion is put forward. Slow wave propagation is also verified by finite-difference time-domain calculations.