Niels Quack

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Volatile and non-volatile nano-electromechanical switches fabricated in a CMOS-compatible silicon-on-insulator foundry process

Niels Quack, Alain Yuji Takabayashi

Nanoelectromechanical (NEM) switches have the advantages of zero leakage current, abrupt switching characteristics, and harsh environmental capabilities. This makes them a promising component for digital computing circuits when high energy efficiency under ...

2025

Temperature-dependent properties of single crystal diamond nanopillars

Niels Quack, Marcell Kristof Kiss

Diamonds possess significant hardness and durability; however, any attempt to deform them typically leads to brittle fracture. In this study, we comprehensively characterize nanoscale diamond at elevated temperatures, using a combination of experimental an ...

Elsevier BV2025

Efficient Low‐Voltage Phase Shifter with Inkjet‐Printed Liquid Crystal on a Silicon on Insulator Platform

Niels Quack, Alain Yuji Takabayashi

A new electro‐optic phase shifter device architecture consisting of two lateral rail electrodes in doped silicon close to a waveguide with a liquid crystal cladding is demonstrated. Starting with a completed silicon photonics wafer of IMEC's iSiPP50G platf ...

Wiley2025

A compact 2 × 2 optical gate using a silicon photonic MEMS dual-drive directional coupler

Niels Quack, Alain Yuji Takabayashi

Reconfigurable optical gates control power and phase in programmable photonic circuits. However, state-of-the-art optical gates are power-hungry due to using heaters and large due to using Mach-Zehnder Interferometers. Here, we demonstrate a compact low-po ...

SPIE2025

Development of Electrical and Optical Packaging for Silicon Photonic MEMS

Niels Quack

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 ...

Institute of Electrical and Electronics Engineers Inc.2024

Fully reconfigurable MEMS-based second-order coupled-resonator optical waveguide (CROW) with ultra-low tuning energy

Niels Quack, Alain Yuji Takabayashi

Integrated microring resonators are well suited for wavelength-filtering applications in optical signal processing, and cascaded microring resonators allow flexible filter design in coupledresonator optical waveguide (CROW) configurations. However, the imp ...

Optica Publishing Group2023

A MEMS tunable phase monitor with integrated photodiode read-out for silicon photonic circuits

Niels Quack, Alain Yuji Takabayashi

Electrostatic MEMS provide low power consumption to programmable photonics. However, the scaling of programmable photonics also requires solutions for circuit monitoring. We demonstrate a MEMS tunable phase monitor with integrated read-out on a foundry pla ...

Optical Society of America2023

Vacuum-sealed silicon photonic MEMS tunable ring resonator with an independent control over coupling and phase

Niels Quack, Alain Yuji Takabayashi

Ring resonators are a vital element for filters, optical delay lines, or sensors in silicon photonics. However, reconfigurable ring resonators with low-power consumption are not available in foundries today. We demonstrate an add-drop ring resonator with t ...

Optica Publishing Group2023

Integrated 4-terminal single-contact nanoelectromechanical relays implemented in a silicon-on-insulator foundry process

Niels Quack, Alain Yuji Takabayashi

Integrated nanoelectromechanical (NEM) relays can be used instead of transistors to implement ultra-low power logic circuits, due to their abrupt turn off characteristics and zero off-state leakage. Further, realizing circuits with 4-terminal (4-T) NEM rel ...

Royal Soc Chemistry2023

Micro- or nanostructured optical element

Niels Quack, Dorian Giraud Herle

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 ...

2023

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Volatile and non-volatile nano-electromechanical switches fabricated in a CMOS-compatible silicon-on-insulator foundry process

Niels Quack, Alain Yuji Takabayashi

2025