Publications by Michail Zervas

Up to 50 dB Extinction in Broadband Single-Stage Thermo-Optic Mach-Zehnder Interferometers for Programmable Low-Loss Silicon Nitride Photonic Circuits

Michail Zervas, Michael Wolfgang Geiselmann

We demonstrate single-stage thermo-optic Si3N4 interferometers with (46.1 +/- 2.5) dB average extinction ratio over 1460-1640 nm (approximate to 50x of typical devices). We analyze performance requirements for creating reconfigurable high-quality-factor re ...

IEEE2021

Towards integrated photonic interposers for processing octave-spanning microresonator frequency combs

Michail Zervas, Davide Sacchetto, Michael Wolfgang Geiselmann

Microcombs-optical frequency combs generated in microresonators-have advanced tremendously in the past decade, and are advantageous for applications in frequency metrology, navigation, spectroscopy, telecommunications, and microwave photonics. Crucially, m ...

SPRINGERNATURE2021

Hybrid integrated photonics using bulk acoustic resonators

Michail Zervas, Tobias Kippenberg, Junqiu Liu

Integrated photonic devices based on Si3N4 waveguides allow for the exploitation of nonlinear frequency conversion, exhibit low propagation loss, and have led to advances in compact atomic clocks, ultrafast ranging, and spectroscopy. Yet, the lack of Pocke ...

Nature Research2020

Integrated Photonic Interposers for Processing Octave-Spanning Microresonator Frequency Combs

Michail Zervas, Davide Sacchetto, Michael Wolfgang Geiselmann

We demonstrate multiple silicon-nitride nanophotonic elements for on-chip processing of octave-spanning microresonator frequency combs. Dichroic filters, multimode interferometers, and tunable add-drop microring filters are shown along with soliton microco ...

IEEE2020

Ultralow-power chip-based soliton microcombs for photonic integration

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Maxim Karpov, Hairun Guo, Bahareh Ghadiani, Junqiu Liu, Arslan Sajid Raja, Nils Johan Engelsen, Anton Lukashchuk

Using the photonic Damascene reflow process, we present single soliton formation in 99-GHz-FSR Si3N4 microresonators of Q-factor exceeding 15 x 10(6), with less than 10 mW optical power. ...

IEEE2019

Highly efficient coupling of crystalline microresonators to integrated photonic waveguides

Michail Zervas, Tobias Kippenberg, John David Jost, Junqiu Liu, Miles Henry Anderson

Crystalline optical whispering gallery mode resonators made from alkaline earth fluorides can achieve exceptionally large optical finesse, and are used in a variety of applications, from frequency stabilization and narrow linewidth lasers, to low-noise mic ...

2018

Ultralow-power chip-based soliton microcombs for photonic integration

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Maxim Karpov, Hairun Guo, Bahareh Ghadiani, Junqiu Liu, Arslan Sajid Raja, Nils Johan Engelsen, Botao Du

The generation of dissipative Kerr solitons in optical microresonators has provided a route to compact frequency combs of high repetition rate, which have already been employed for optical frequency synthesizers, ultrafast ranging, coherent telecommunicati ...

OPTICAL SOC AMER2018

Double inverse nanotapers for efficient light coupling to integrated photonic devices

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Michael Wolfgang Geiselmann, Hairun Guo, Junqiu Liu, Clemens Herkommer, Arslan Sajid Raja

2018

Photonic Damascene Process for Low-Loss, High-Confinement Silicon Nitride Waveguides

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Michael Wolfgang Geiselmann, Clemens Herkommer

2018

Ultralow-Power Photonic Chip-Based Soliton Frequency Combs

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Maxim Karpov, Hairun Guo, Bahareh Ghadiani, Junqiu Liu, Arslan Sajid Raja, Nils Johan Engelsen

The generation of dissipative Kerr solitons in optical microresonators allow compact high repetition rate frequency combs. A particularly promising platform is photonic integrated Si3N4 microresonators. Yet to date, soliton formation in Si3N4 microresonato ...

IEEE2018

Port: A Piezoelectric Optical Resonance Tuner

Michail Zervas, Tobias Kippenberg

This abstract presents an aluminum nitride (AlN) piezoelectric actuator for tuning optical resonance modes of silicon nitride photonic resonators. The AlN actuator is fabricated on top of a thick silicon dioxide cladding that encapsulates the nitride reson ...

IEEE2018

Octave-spanning dissipative Kerr soliton frequency combs in Si3N4 microresonators

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Erwan Guillaume Albert Lucas, Maxim Karpov, Hairun Guo, Junqiu Liu, Clemens Herkommer

Octave-spanning, self-referenced frequency combs are applied in diverse fields ranging from precision metrology to astrophysical spectrometer calibration. The octave-spanning optical bandwidth is typically generated through non-linear spectral broadening o ...

Optical Soc Amer2017

A chip-based silicon nitride platform for mid-infrared nonlinear photonics

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Camille Sophie Brès, Adrien Billat, Hairun Guo, Davide Grassani, Clemens Herkommer

We developed a chip-based silicon nitride platform with thick waveguides (> 2 mm) that overcomes the usual fabrication limitation. We demonstrate both microresonator frequency comb generation at 2:5 mm and supercontinuum generation extending beyond 4:0 mm ...

OSA Publishing2017

A chip-based silicon nitride platform for mid-infrared nonlinear photonics

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Camille Sophie Brès, Adrien Billat, Hairun Guo, Davide Grassani, Clemens Herkommer

We developed a chip-based silicon nitride platform with thick waveguides (> 2 mm) that overcomes the usual fabrication limitation. We demonstrate both microresonator frequency comb generation at 2:5 mm and supercontinuum generation extending beyond 4:0 mm ...

2017

Heterogeneous integration of lithium niobate and silicon nitride waveguides for wafer-scale photonic integrated circuits on silicon

Nicolas Volet, Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer

An ideal photonic integrated circuit for nonlinear photonic applications requires high optical nonlinearities and low loss. This work demonstrates a heterogeneous platform by bonding lithium niobate (LN) thin films onto a silicon nitride (Si3N4) waveguide ...

Optical Society of America2017

Frequency comb generation in the green using silicon nitride microresonators

Nicolas Volet, Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Hairun Guo

Optical frequency combs enable precision measurements in fundamental physics and have been applied to a growing number of applications, such as molecular spectroscopy, LIDAR and atmospheric trace-gas sensing. In recent years, the generation of frequency co ...

Wiley-VCH Verlag Berlin2016

Raman Self-Frequency Shift of Dissipative Kerr Solitons in an Optical Microresonator

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Victor Brasch, Arne Kordts, Michael Wolfgang Geiselmann, Maxim Karpov, Hairun Guo

We experimentally observed the Raman-induced self-frequency shift of high-intensity dissipative Kerr solitons in high-Q silicon nitride microresonators. The Raman redshift is linearly dependent on the pump-frequency-detuning, associated with the tunability ...

Ieee2016

Raman Self-Frequency Shift of Dissipative Kerr Solitons in an Optical Microresonator

Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Victor Brasch, Arne Kordts, Michael Wolfgang Geiselmann, Maxim Karpov, Hairun Guo

The formation of temporal dissipative Kerr solitons in microresonators driven by a continuous-wave laser enables the generation of coherent, broadband, and spectrally smooth optical frequency combs as well as femtosecond pulse sources with compact form fac ...

American Physical Society2016

Generation of an optical frequency comb in the green with silicon nitride microresonators

Nicolas Volet, Michail Zervas, Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Hairun Guo

The first realization of a green-light frequency comb is reported in a silicon nitride ring microresonator, from third-order non-linear interaction of a near-infrared 1-THz spacing Kerr comb spanning 2/3 of an octave. ...

Ieee2016

Applications of Multi-Terminal Memristive Devices: A Review

Yusuf Leblebici, Giovanni De Micheli, Michail Zervas, Davide Sacchetto, Sandro Carrara, Pierre-Emmanuel Julien Marc Gaillardon

Memristive devices have the potential for a complete renewal of the electron devices landscape, including memory, logic and sensing applications. This is especially true when considering that the memristive functionality is not limited to two-terminal devi ...

Ieee-Inst Electrical Electronics Engineers Inc2013