Search research articles

Related Concept Videos

Deflection of a Beam

Deflection of a Beam

Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Edge-emitting LED refractometer.

Optics express·2026

Same author

Polarization-independent narrow-band integrated add-drop filter for the short near-infrared wavelength range.

Optics letters·2026

Same author

Robust integrated optical feedback interferometry via variable optical attenuation.

Optics express·2025

Same author

Integrated polarization beam splitters in the silicon nitride platform for 950 nm and 1300 nm wavelengths.

Optics letters·2025

Same author

Parabolic dielectric reflector for extreme on-chip spot-size conversion with broad bandwidth.

Optics letters·2025

Same author

End-to-end simulations of photonic phase correctors for adaptive optics systems.

Optics express·2024

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Video

Updated: Nov 5, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

High-efficiency conversion from waveguide mode to an on-chip beam using a metamaterial engineered Bragg deflector.

Abdelfettah Hadij-ElHouati, Pavel Cheben, Alejandro Ortega-Moñux

|May 14, 2021

Summary

Distributed Bragg deflectors in integrated photonics can now achieve significantly lower losses. By employing single-beam phase matching and metamaterial engineering, off-chip radiation is dramatically reduced, enabling new applications.

More Related Videos

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Related Experiment Videos

Last Updated: Nov 5, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Area of Science:

Integrated photonics
Metamaterials
Waveguide optics

Background:

Diffraction gratings redirect light in channel waveguides to on-chip slabs, serving as key components in integrated photonics.
Distributed Bragg deflectors (DBDs) are crucial for shaping beams in slab waveguides for applications like wavelength multiplexing and optical phased arrays.
Current DBD designs face substantial signal loss due to off-chip radiation.

Purpose of the Study:

To investigate methods for significantly reducing off-chip radiation losses in diffraction gratings used in integrated photonics.
To demonstrate a novel DBD design that overcomes limitations of existing technologies.

Main Methods:

Implementation of the single-beam phase matching condition.
Utilization of subwavelength metamaterial refractive index engineering.
Design and simulation of a novel diffraction grating structure.

Main Results:

Achieved a dramatic reduction in off-chip radiation losses.
Presented a DBD design exhibiting losses below 0.3 dB.
Validated the effectiveness of the proposed metamaterial engineering approach.

Conclusions:

The developed DBD design offers a significant improvement over existing technologies.
This advancement paves the way for new applications of DBDs in integrated photonics.
Metamaterial engineering and phase matching are effective strategies for loss reduction in photonic devices.