Related Experiment Video
Updated: Jul 14, 2026
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Design of a subwavelength bent C-aperture waveguide
Paul Hansen1, Lambertus Hesselink, Brian Leen
1Department of Applied Physics, Stanford University, CA 94305, USA. pch@stanford.edu
Optics Letters
|June 19, 2007
Summary
We designed a C-shaped optical waveguide that efficiently transports light in a subwavelength format. This novel design achieves a tiny exit spot size, enabling enhanced light confinement for optical applications.
Area of Science:
- Photonics
- Nanotechnology
- Optical Engineering
Background:
- Subwavelength optical waveguides are crucial for miniaturizing optical circuits.
- Efficient light transport and confinement are key challenges in nanophotonics.
Purpose of the Study:
- To design and simulate a novel C-shaped optical waveguide.
- To achieve efficient light transport with tight confinement at the subwavelength scale.
Main Methods:
- Finite-difference time-domain (FDTD) simulations were employed.
- Simulations were performed for perfect electric conductors and gold (Au) C-aperture waveguides at optical frequencies.
Main Results:
- A C-shaped waveguide design resonant near 780 nm was developed.
- An exit spot size of 107 nm x 107 nm (lambda/7) was achieved.
- An energy density enhancement factor of 10 was observed for a 1.4 micrometer long bent waveguide.
Conclusions:
- The proposed C-shaped waveguide design enables efficient subwavelength light transport.
- The design demonstrates significant light confinement and energy density enhancement.
- This offers potential for advanced nanophotonic devices and integrated optics.
Related Concept Videos
01:23Design of Prismatic Beams for Bending
The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and stress...
01:28Standing Waves in a Cavity
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
01:14Bending of Curved Members - Strain Analysis
The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member is the...
The important part of bending analysis for such a member is the...