Photon Design

Oxford, United Kingdom

Photon Design

Oxford, United Kingdom

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Smit M.,TU Eindhoven | Leijtens X.,TU Eindhoven | Ambrosius H.,TU Eindhoven | Bente E.,TU Eindhoven | And 57 more authors.
Semiconductor Science and Technology | Year: 2014

Photonic integrated circuits (PICs) are considered as the way to make photonic systems or subsystems cheap and ubiquitous. PICs still are several orders of magnitude more expensive than their microelectronic counterparts, which has restricted their application to a few niche markets. Recently, a novel approach in photonic integration is emerging which will reduce the R&D and prototyping costs and the throughput time of PICs by more than an order of magnitude. It will bring the application of PICs that integrate complex and advanced photonic functionality on a single chip within reach for a large number of small and larger companies and initiate a breakthrough in the application of Photonic ICs. The paper explains the concept of generic photonic integration technology using the technology developed by the COBRA research institute of TU Eindhoven as an example, and it describes the current status and prospects of generic InP-based integration technology. © 2014 IOP Publishing Ltd.


Pernice W.H.P.,Yale University | Payne F.P.,University of Oxford | Chaloulos K.,Photon Design | Gallagher D.F.G.,Photon Design
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields | Year: 2010

We present a method for including areas of high grid density into a general grid for the finite-difference time-domain method in three dimensions. Reflections occurring at the boundaries separating domains of different grid size are reduced significantly by introducing appropriate interpolation methods for missing boundary points. Several levels of refinement can be included into one calculation using a hierarchical refinement architecture. The algorithm is implemented with an auxiliary differential equation technique that allows for the simulation of metallic structures. We illustrate the performance of the algorithm through the simulation of metal nano-particles included in a coarser grid and by investigating gold optical antennas. © 2009 John Wiley & Sons, Ltd.


Dunbar L.A.,Swiss Center for Electronics and Microtechnology | Threlfall E.,Photon Design | Eckert R.,Swiss Center for Electronics and Microtechnology | Angeloni S.,Swiss Center for Electronics and Microtechnology | Stanley R.P.,Swiss Center for Electronics and Microtechnology
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

Enhanced transmissions at infra-red wavelengths are measured through hole arrays made in gold-covered silicon nitride free-standing membranes. The membranes are made by a standard photolithography batch process. They are cheap to fabricate, reproducible and robust. The optical transmission of the membranes are investigated with varying hole size (down to 1μm), period, and thickness. The membranes show enhanced optical transmission. The spectra show good agreement with a very simple mode matching model which can be used for design. Calculations are also shown giving absorption enhancements of 5.7 normalized to the same material on a silicon membrane. Finite difference time domain calculations are also presented to show the spatial distribution of the enhanced field. Field enhancements of 3.3 are calculated. The field enhancements are concentrated in the hole which makes the membranes ideally suited for a microfluidic setup. Hence, this paper shows that through enhanced transmission cheap, disposable membranes in a simplified transmission can be used for measurements for molecular absorption. © 2013 SPIE.


Lycett R.J.,Photon Design | Gallagher D.F.G.,Photon Design | Brulis V.J.,Photon Design
IEEE Photonics Journal | Year: 2013

A new method for designing an echelle-type diffraction grating for wavelength division multiplexing (WDM), which is tuned to a single stigmatic point, is introduced. The new grating is defined by the mode and wavelength of operation in a slab waveguide, the position of the waveguides, the order of diffraction, and an arbitrary path, which is called the grating line, upon which individual facets are positioned, blazed, and curved via the outlined algorithm. A systematic design process for echelle gratings (EGs) is presented, covering all the key aspects of this device. A series of rules to improve the performance of any EG WDM device is outlined. A simulated comparison between this device, a standard Rowland grating, and a two stigmatic point grating, was undertaken with the new design performing better and comparably in each case, respectively. © 2009-2012 IEEE.

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