Large Area Three-Dimensional Photonic Crystal Membranes: Single-Run Fabrication and Applications with Embedded Planar Defects

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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Three-dimensional photonic crystals (3D PhCs) enable light manipulations in all three spatial dimensions, however, real world applications are still faced with challenges in fabrication. Here, a facile fabrication strategy for 3D silicon PhCs with a simple cubic (SC) lattice structure is presented, which exhibits a complete photonic bandgap at near-infrared wavelengths of around 1100 nm. The fabrication process is composed of standard deep ultra-violet stepper lithography, followed by a single-run modified plasma etch process.
By applying a direct dry etch release step at the end of the 3D structural etch process, the fabricated 3D PhCs can be released and transferred in the form of a membrane onto other substrates such as glass, polymers, or even substrates with engineered surface. The thickness of the demonstrated membranes is around 2 μm and the size can be up to a few millimeters. A high reflectivity is observed at the stop band frequency, and a planar defect is introduced during the etching process resulting in an optical resonance mode with a small linewidth of around 30 nm. The structure constitutes an optical bandpass filter and can be used as a sensor for organic solvents.
Original languageEnglish
Article number1801176
JournalAdvanced Optical Materials
Volume7
Issue number2
Number of pages9
ISSN2195-1071
DOIs
Publication statusPublished - 2019
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • #D photonic crystals, DREM process, Planar cavities, Plasma etching, Silicon

ID: 161965520