Search Menu
Photonics Media Photonics Marketplace Photonics Spectra BioPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook

Existing Fab Methods Could Yield ‘Light Prison’

Facebook Twitter LinkedIn Email
ENSCHEDE, Netherlands, Sept. 26, 2014 — A “prison for light” designed by Dutch theorists could be created using existing silicon-etching techniques and play a role in optical communications.

The inverse woodpile photonic crystal has an atomic structure similar to diamond and incorporates arrays of perpendicular pores. One pore in each set has a smaller diameter, forming a point-defect at their intersection where light is confined.

The photonic bandgap crystal has a diamond-like structure, made of two sets of mutually perpendicular pores drilled in silicon. To realize a resonant cavity, one pore in each set (indicated by black arrows) has a smaller diameter. At the intersection of these two pores, a point-defect appears capable of confining light appears. Courtesy of MESA+. 

The crystal would have a record-wide photonic bandgap, according to its designers at the MESA+ Institute for Nanotechnology at the University of Twente. Up to five isolated and dispersionless bands appear within the bandgap, with wavelength ranges compatible with telecommunication windows in the near-infrared.

The mode volume of the cavity resonance is as small as 0.8 λ3, indicating a strong confinement of the light, the researchers said.

Confining photons has many applications in optics, such as efficient miniature lasers and LEDs, as well as on-chip data storage and biosensors.

Previously, the team showed that diamond-like photonic bandgap crystals can be etched in silicon, with techniques commonly used in CMOS fabrication. The new cavity design could be applied during the routine fabrication of photonic crystals, they said, opening the possibility of integrating ultrafast photon manipulation with existing electronic information manipulation.

The work was published in Physical Review B (doi: 10.1103/PhysRevB.90.115140).

For more information, visit
Sep 2014
CommunicationsconfinementEuropelight confinementMESA+ Institute for NanotechnologynanoNetherlandsphotonic bandgapphotonic bandgap crystalsphotonic crystalphotonic crystal cavityResearch & TechnologyUniversity of Twente

back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2023 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, [email protected]

Photonics Media, Laurin Publishing
x We deliver – right to your inbox. Subscribe FREE to our newsletters.
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.