Publications de Jiaye Wu | EPFL Graph Search

Nanophotonic-enabled extra- and intra-cavity manipulation of ultrafast optical pulse trains

Light-matter-interaction is an intriguing research hotspot that covers the linear and nonlinear control of electromagnetic waves in various optical media. Since it is an immensely broad topic, our work focuses on the extra- and intra-cavity manipulation of ...

EPFL2025

Bridging the Mode-Locked and Q-Switched Regimes in Fiber Lasers

Camille Sophie Brès, Jiaye Wu, Gang Wang

Mode-locking and Q-switching are two widely used pulsing techniques based on different mechanisms. In practice, both lasing regimes can be realized within the same laser system, while the current research on their transition dynamics presents challenges in ...

WILEY-V C H VERLAG GMBH2025

Thermo-optic epsilon-near-zero effects

Camille Sophie Brès, Jiaye Wu, Marco Clementi, Qian Li

Nonlinear epsilon-near-zero (ENZ) nanodevices featuring vanishing permittivity and CMOS-compatibility are attractive solutions for large-scale-integrated systems-on-chips. Such confined systems with unavoidable heat generation impose critical challenges fo ...

Nature Portfolio2024

Versatile and Efficient Dual-Range Frequency Shifts by Intracavity Epsilon-Near-Zero Nanolayers

Camille Sophie Brès, Jiaye Wu, Ji Zhou, Marco Clementi

We experimentally demonstrate for the first time, the efficient input-dependent dual-range frequency shifts of 279.73 GHz and 3.63 THz in a mode-locked fiber laser with an intracavity epsilon-near-zero element. Real-time observation reveals that the presen ...

Institute of Electrical and Electronics Engineers Inc.2024

Intracavity Epsilon-Near-Zero Dual-Range Frequency Switch

Camille Sophie Brès, Jiaye Wu, Ji Zhou, Marco Clementi

Epsilon-near-zero (ENZ) nanophotonic devices with zero permittivity are known to exhibit adiabatic frequency translation via temporal refraction under extracavity excitation by intense light sources, which are however hard to integrate on-chip owing to a h ...

2024

Epsilon-near-zero Enhancement of Linear and Nonlinear Thermo-optic Effects

Camille Sophie Brès, Jiaye Wu, Marco Clementi

Epsilon-near-zero (ENZ) materials, characterized by their near-zero permittivity, ease of fabrication, enhanced nonlinearity, and compatibility for nano-fabrication, have positioned themselves as alluring solutions for large-scale integrated systems-on-chi ...

Institute of Electrical and Electronics Engineers Inc.2024

Bright and dark Talbot pulse trains on a chip

Camille Sophie Brès, Jianqi Hu, Jiaye Wu, Christian André Clément Lafforgue, Edgars Nitiss, Marco Clementi

Temporal Talbot effect, the intriguing phenomenon of the self-imaging of optical pulse trains, is extensively investigated using macroscopic components. However, the ability to manipulate pulse trains, either bright or dark, through the Talbot effect on in ...

Nature Portfolio2023

Manufacturing-Enabled Tunability of Linear and Nonlinear Epsilon-Near-Zero Properties in Indium Tin Oxide Nanofilms

Jiaye Wu, Qian Li, Xuanyi Liu

Epsilon-near-zero (ENZ) materialshave attracted great interestdue to their exotic linear and nonlinear responses, which makes itsignificant to tune ENZ wavelengths for wavelength-dependent applications.However, studies to achieve tunability in a wide spect ...

AMER CHEMICAL SOC2023

All-optical switching in epsilon-near-zero asymmetric directional coupler

Jiaye Wu, Qian Li

We propose an all-optical switch based on an asymmetric directional coupler structure with epsilon-near-zero (ENZ) layer. The nonlinear optical properties the of ENZ layer are analyzed by hot-electron dynamics process, and the all-optical operating perform ...

Nature Portfolio2022

Temporal Talbot effect of optical dark pulse trains

Camille Sophie Brès, Jianqi Hu, Jiaye Wu

The temporal Talbot effect describes the periodic self-imaging of an optical pulse train along dispersive propagation. This is well studied in the context of bright pulse trains, where identical or multiplied pulse trains with uniform bright waveforms can ...

OPTICAL SOC AMER2022