Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Optimization of a 60° waveguide bend in InP-based 2D planar photonic crystals

Not Accessible

Your library or personal account may give you access

Abstract

We present a novel design for a W1 (one missing row of holes) waveguide 60° bend implemented in a substrate-type InPInGaAsPInP planar photonic crystal based on a triangular array of air holes. The bend has been designed to provide high transmission over a large bandwidth. The investigated design improvement relies only on displacing holes while avoiding changing individual holes diameter in the interest of better process control (homogenous hole depth). Two-dimensional (2D) finite-element simulations were used to increase the relative transmission bandwidth from 18% to 40% of the photonic bandgap for unoptimized and optimized 60° bends, respectively. The 2D results were verified by means of rigorous three-dimensional (3D) finite-difference time-domain (FDTD) simulations. We show that excellent agreement between 2D and 3D simulations can be obtained, provided a small effective-index shift of 0.024 (0.74%) and an imaginary loss parameter (ϵ=0.014) is introduced in the 2D simulations. To demonstrate the applicability of our improved design, the bend was fabricated and measured using the endfire technique. A bending loss of 3dB is obtained for the optimized W1 waveguide bend compared to more than 8dB in the unoptimized case.

© 2007 Optical Society of America

Full Article  |  PDF Article
More Like This
Broadband photonic crystal waveguide 60° bend obtained utilizing topology optimization

L.H. Frandsen, A. Harpøth, P.I. Borel, M. Kristensen, J.S. Jensen, and O. Sigmund
Opt. Express 12(24) 5916-5921 (2004)

Proposal for enhancing the transmission efficiency of photonic crystal 60° waveguide bends by means of optofluidic infiltration

Sarah Bakhshi, Mohammad K. Moravvej-Farshi, and Majid Ebnali-Heidari
Appl. Opt. 50(21) 4048-4053 (2011)

Systematic design study of waveguides and waveguide bends in diamond-structured photonic crystals

Amit Vishnoi, Rina Mudi, and Kapil Debnath
J. Opt. Soc. Am. B 38(3) 907-913 (2021)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved