Publications de Aleksandr Tusnin

Emergent nonlinear dynamics in photonic lattices

Since the discovery of dissipative Kerr solitons in optical microresonators, significant progress has been made in the understanding of the underlying physical principles from the fundamental side and generation of broadband coherent optical Kerr frequency ...

EPFL2024

Probing the Formation of Nonlinear Optical States with Free Electrons

Tobias Kippenberg, Rui Ning Wang, Aleksandr Tusnin, Zheru Qiu, Yujia Yang, Arslan Sajid Raja, Guanhao Huang, Alexey Tikan

Combining nonlinear integrated photonics with electron microscopy, we probe the formation of optical dissipative structures in Si3N4 microresonators with free electrons and find unique spectral fingerprints in the electron spectrum that enable new electron ...

Institute of Electrical and Electronics Engineers Inc.2024

Free-electron interaction with nonlinear optical states in microresonators

Tobias Kippenberg, Rui Ning Wang, Aleksandr Tusnin, Zheru Qiu, Yujia Yang, Arslan Sajid Raja, Guanhao Huang, Alexey Tikan

The short de Broglie wavelength and strong interaction empower free electrons to probe structures and excitations in materials and biomolecules. Recently, electron-photon interactions have enabled new optical manipulation schemes for electron beams. In thi ...

American Association for the Advancement of Science2024

Voltage-tunable optical parametric oscillator with an alternating dispersion dimer integrated on a chip

Tobias Kippenberg, Anton Stroganov, Aleksandr Tusnin, Alexey Tikan

Optical parametric oscillators enable the conversion of pump light to new frequency bands using nonlinear optical processes. Recent advances in integrated nonlinear photonics have led to the creation of compact, chip-scale sources via Kerr-nonlinearity-ind ...

Optica Publishing Group2023

Edge state optical frequency combs in the microresonator based Su-Schrieffer-Heeger model

Tobias Kippenberg, Xinru Ji, Aleksandr Tusnin, Alexey Tikan

We demonstrate the first observation of optical frequency combs at the edge state of the Su-Schrieffer-Heeger model. We show soliton-induced edge-bulk interaction and edge-state hopping. ...

Optical Society of America2023

Dispersion engineering with coupled microresonators for extended soliton microcomb control

Tobias Kippenberg, Aleksandr Tusnin, Alexey Tikan

We investigate coupled-resonator dispersion engineering capabilities for con-trolling the shape of the soliton microcomb in real time. ...

Optical Society of America2023

Chaotic microcomb-based parallel ranging

Tobias Kippenberg, Aleksandr Tusnin, Junqiu Liu, Anton Lukashchuk

The intrinsic random amplitude and phase modulation of 40 distinct lines of a microresonator frequency comb operated in the modulation instability regime are used to realize massively parallel random-modulation continuous-wave light detection and ranging, ...

Nature Publishing Group2023

Quiet point engineering for low-noise microwave generation with soliton microcombs

Tobias Kippenberg, Aleksandr Tusnin, Alexey Tikan

In this work, we employ the avoided mode crossing engineering in microresonators for the ultra-low noise microwave generation with dissipative Kerr solitons. ...

Optical Society of America2023

Dissipative Solitons and Switching Waves in Dispersion-Modulated Kerr Cavities

Tobias Kippenberg, Rui Ning Wang, Aleksandr Tusnin, Alisa Davydova, Miles Henry Anderson, Alexey Tikan

We theoretically and experimentally investigate the formation of dissipative coherent structures in Kerr nonlinear optical microresonators, whose spectrum encompasses an integrated dispersion that exceeds the cavity free-spectral range. We are able to acce ...

American Physical Society2023

Nonlinear dynamics and Kerr frequency comb formation in lattices of coupled microresonators

Tobias Kippenberg, Aleksandr Tusnin, Alexey Tikan, Kenichi Komagata

Recently, substantial progress has been made in the understanding of microresonators frequency combs based on dissipative Kerr solitons (DKSs). However, most of the studies have focused on the single-resonator level. Coupled resonator systems can open new ...

Nature Portfolio2023