Publications by Niels Quack | EPFL Graph Search

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Programmable photonics promise a plethora of optical functions while at the same time reducing the time and costs of photonic integrated circuit (PIC) development. One primary bottleneck for development of these systems is the difficulty in increasing comp ...

We present design, fabrication and experimental characterization of a multichannel Smart Slit Assembly for next generation spectrometers, based on an array of 40 variable optical attenuators employing MEMS shutters integrated with large core multimode rect ...

We demonstrate a packaging approach to integrate electrical and optical connections in silicon photonic MEMS, utilizing a custom-designed silicon interposer for routing over 118 electrical connections and a 72 channel fiber array to couple to on-chip fiber ...

Programmable photonic integrated circuits are emerging as an attractive platform for applications such as quantum information processing and artificial neural networks. However, current programmable circuits are limited in scalability by the lack of low-po ...

We demonstrate a broadband Silicon Photonic directional coupler that is entirely suspended in air. The device has been fabricated in a simplified Silicon Photonics process based on the standard IMEC ISIPP5OG platform, combined with custom post-processing i ...

The present invention concerns an optical grating comprising a body defining a first external surface and a second external surface. The first external surface defines a periodic structure comprising a plurality of elongated protrusions and a plurality of ...

We present the concept and design, and we report on the experimental performance of a broadband Variable Optical Attenuator (VOA) for integration with large-core rectangular multimode waveguides. Operation of an individual 221 mu m x 111 mu m optical waveg ...

Hall devices having an active area of about (500 nm)2 are fabricated by focused electron-beam-induced deposition. The deposited material consists of cobalt nanoparticles in a carbonaceous matrix. The realized devices have, at room temperature, a current se ...

A micro- or nanostructured optical element (1) is proposed comprising: a membrane (3) with an array of holes (5), the membrane (3) comprising a membrane light wave facing surface; an array of pillars (7) sized and shaped such that a respective pillar (7) i ...

The present invention concerns a layer or substrate flattening method comprising the steps of: - providing a layer or substrate (1) to be flattened; - measuring a topography or surface profile of at least one area (3) of the layer or substrate to be flatte ...

Photonic integrated circuits have seen a dramatic increase in complexity over the past decades. This development has been spurred by recent applications in datacenter communications and enabled by the availability of standardized mature technology platforms. Mechanical movement of wave-guiding structures at the micro-and nanoscale provides unique opportunities to further enhance functionality and to reduce power consumption in photonic integrated circuits. We here demonstrate integration of MEMS-enabled com

We propose a non-contact surface finishing method for brittle substrates by ion beam etching and we experimentally demonstrate polishing of (100) single crystal diamond surface. We model and simulate the polishing process, and verify the results experiment ...

The present invention concerns a single crystalline diamond optical element production method. The method includes the steps of: ‐ providing a single crystalline diamond substrate or layer; ‐ applying a mask layer to the single crystalline diamond substrat ...

We present our work to extend silicon photonics with MEMS actuators to enable low-power, large scale programmable photonic circuits. For this, we start from the existing iSiPP50G silicon photonics platform of IMEC, where we add free-standing movable wavegu ...

Directional couplers are extensively used in photonic integrated circuits as basic components for efficient on-chip photonic signal routing. Conventionally, directional couplers are fully encapsulated in the technology's waveguide cladding material. In thi ...

We demonstrate generation of linear frequency chirps exhibiting an excursion of 50 GHz (λ0=1548nm) using an optoelectronic phase-locked loop and integrated silicon photonics interferometer (FSR=3.0GHz), demonstrating the feasibility of an integrated chip-scale frequency-modulated continuous-wave LADAR source. OCIS codes: (250.3140) Integrated optoelectronic circuit; (010.3640) Lidar.

The integration of MEMS transducers in photonic integrated circuits provides opportunities for high efficiency photonic modulation and dynamic routing on-chip. We here present an electrostatically actuated, silicon photonic MEMS 2 x 2 power coupler, fabric ...

The field of diamond photonics is reviewed, with a focus on recent experimental demonstrations of photonic integrated devices in a single crystal diamond. This field leverages the outstanding material properties of diamond with the aim to establish large-s ...

Aluminium nitride is a promising photonic material from the ultra-violet to the mid-infrared spectral range. We present spectroscopic ellipsometry of sputtered AlN thin films on insulator in the spectral range 0.19 mu m - 25 mu m, surface roughness charact ...

Niels Quack

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Compact Integrated Silicon Photonic Mems Power Coupler For Programmable Photonics

Multichannel Smart Slit Assembly For Spectroscopy Based On Arrays Of Variable Optical Mems Attenuators

Development of Electrical and Optical Packaging for Silicon Photonic MEMS

Silicon photonic microelectromechanical phase shifters for scalable programmable photonics

Silicon Photonic Broadband Suspended Directional Coupler

Optical element

Mems Shutter Based Variable Optical Attenuator Integrated With Large Core Multimode Rectangular Waveguides

Submicrometer Hall devices fabricated by focused electron-beam-induced deposition

Micro- or nanostructured optical element

Method for flattening substrates or layers using 3d printing and etching

Mems-enabled Silicon Photonic Integrated Devices and Circuits

Non-contact polishing of single crystal diamond by ion beam etching

Single crystalline diamond diffractive optical elements and method of fabricating the same

Programmable silicon photonic circuits powered by MEMS

Compact broadband suspended silicon photonic directional coupler

Linear Frequency Chirp Generation Employing Opto-electronic Feedback Loop and Integrated Silicon Photonics

CONTINUOUSLY TUNABLE SILICON PHOTONIC MEMS 2 x 2 POWER COUPLER

MEMS-Enabled Silicon Photonic Integrated Devices and Circuits

Integrated photonic devices in single crystal diamond

Optical Properties of Aluminium Nitride on Insulator for Integrated Photonics