Engineering review required · Custom project · Dedicated production

GaN & Advanced Custom Platforms

Custom GaN and advanced semiconductor platforms including GaN-on-sapphire, GaN-on-silicon, AlGaN/GaN, metasurfaces, photonic structures and non-standard device integration.

GaN-based and advanced custom semiconductor platforms for metasurfaces, photonics, sensing and project-specific integration.

GaN-on-sapphire and GaN-on-silicon

AlGaN/GaN device platforms

Wafer-scale metasurface processing

Project-specific semiconductor integration

What We Supply

GaN and AlGaN/GaN engineering wafers
Custom metasurface and nanostructure fabrication
Photonic and optoelectronic device processing
Dedicated masks and project-specific modules
Diced chips and full-wafer delivery
Pilot manufacturing and recurring production support

Configurable Parameters

GaN substrate and epitaxial structure
Device or metasurface architecture
Critical dimensions and etch depth
Metallisation and interfaces
Wafer format
Prototype and annual production quantity

Application Areas

Metasurfaces and imaging
Optoelectronics
Integrated photonics
RF and sensing devices
Advanced research platforms
Customer-specific semiconductor systems

Manufacturing Route

Engineering Samples

Pilot Production

Volume Production

Real Fabrication & Characterisation

Selected 25FAB and project fabrication images presented in a more commercial, customer-ready format.

Selected Publications

Representative publications related to this platform.

Inverse design of plasmonic metasurfaces by the convolutional neural network

Optics Letters 2020 Journal article

Authors: R. Lin, Y. Zhai, C. Xiong, X. Li
Journal / Conference: Optics Letters
Year: 2020
Type: Journal article

On-chip integrated lateral and vertical tunable metasurfaces for 3D imaging

MNE-ES 2022 Oral presentation

Authors: Yanfen Zhai, Takashi Sasaki, Mohssen Moridi, Ronghui Lin, Zahrah Alnakhli, Lixiang Wu, Atif Shamim, Xiaohang Li, Mohammad Younis, Kazuhiro Hane
Journal / Conference: MNE-ES
Year: 2022
Type: Oral presentation

3D pillars plasmonic contact electrodes for photoconductive terahertz antennas

MNE-ES 2022 Conference paper

Authors: Yanfen Zhai, Xurong Li, Heng Wang, Gaurav Jayaswal, Mohssen Moridi, Mona Jarrahi, Atif Shamim
Journal / Conference: MNE-ES
Year: 2022
Type: Conference paper

Fabrication of high-aspect-ratio α-Si pillar photonic crystal-coupled plasmonic waveguide for on-chip gas sensing

MNE-ES 2022 Conference paper

Authors: Yanfen Zhai, Florian Dubois, Thang Duy Dao, Jasmin Spettel, Takashi Sasaki, Reyhaneh Jannesari, Gerald Pühringer, Nikolai Andrianov, Lukas Vojkuvka, Clement Fleury, Cristina Consani, Gerald Stocker, Thomas Grille, Parviz Saeidi, Bernhard Jakoby, Mohssen Moridi, Andreas Tortschanoff
Journal / Conference: MNE-ES
Year: 2022
Type: Conference paper

Wide-spectral-range DUV–MIR spectroscopic ellipsometry study of PECVD-grown silicon oxide and nitride thin films

ICSE 2022 Conference paper

Authors: Syed Munir Azeem, Jasmin Spettel, Andrianov Nikolai, Jeremy Streque, Tommaso Cassese, Julian Pilz, Dmytro Solonenko, Clément Fleury, Florian Dubois, Yanfen Zhai, Norbert Cselyuszka, Andreas Tortschanoff, Mohssen Moridi, Thang Duy Dao
Journal / Conference: ICSE
Year: 2022
Type: Conference paper

The Design of an Iris Waveguide Filter at 35.75 GHz

IEEE ICMMT 2008 Conference paper

Authors: Y. Zhai, Q. Wang, Z. Wang
Journal / Conference: IEEE ICMMT
Year: 2008
Type: Conference paper

Design of an Economical Compact Combline Filter

IEEE ICMMT 2008 Conference paper

Authors: Z. Wang, Q. Wang, Y. Zhai
Journal / Conference: IEEE ICMMT
Year: 2008
Type: Conference paper

Design of a FSS waveguide filter at 8.05 GHz

IEEE ICMMT 2008 Conference paper

Authors: S. Cai, Q. Wang, Z. Wang, Y. Zhai
Journal / Conference: IEEE ICMMT
Year: 2008
Type: Conference paper

Contact

GaN & Advanced Custom Platforms

office@25fab.ch