Hairun Guo

Cette personne n’est plus à l’EPFL

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Publications associées (49)

Widely Tunable Mid-IR Femtosecond Resonant Radiation Induced by Self-defocusing Solitons in a Quadratic Nonlinear Medium

Hairun Guo

We experimentally observe widely tunable mid-IR femtosecond pulses by resonant radiation, generated by direct three-wave-mixing from a soliton in PPLN. The poling pitch gives a parametrically tunable resonant radiation, a feature absent in Kerr media. ...

Ieee2016

Coupling Ideality of Integrated Silicon Nitride Microresonators for Nonlinear Photonics

Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Victor Brasch, Arne Kordts, Maxim Karpov, Hairun Guo, Junqiu Liu

Integrated microresonators are essential building blocks of linear and nonlinear photonic devices. Here we show that the performance of high-Q silicon nitride microresonators for nonlinear photonics strongly depends on the ideality of their coupler design. ...

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

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

Universal Dynamics and Controlled Switching of Dissipative Kerr Solitons in Optical Microresonators

Tobias Kippenberg, Martin Hubert Peter Pfeiffer, Victor Brasch, Erwan Guillaume Albert Lucas, Arne Kordts, Maxim Karpov, Hairun Guo

We discover a novel mechanism allowing for successive reduction of the number of dissipative Kerr solitons in optical microresonators. It is demonstrated that multiple and single soliton state can be deterministically accessed. ...

Ieee2016

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

Colloidal monolayer trapped near a charged wall: A synchrotron x-ray diffraction study

Christian David, Hairun Guo

2008

Confinement-induced liquid ordering investigated by x-ray phase retrieval

Christian David, Hairun Guo

Using synchrotron x-ray diffraction, we have determined the ensemble-averaged density profile of colloidal fluids within confining channels of different widths. We observe an oscillatory ordering-disordering behavior of the colloidal particles as a functio ...

2007

Microcavity arrays for X-ray diffraction studies of ordering phenomena in confined colloid solutions

Christian David, Hairun Guo

We present a way to fabricate high-aspect-ratio silicon microcavity arrays which can be used for the investigation of confinement-induced ordering phenomena within colloid solutions. In these studies, the microcavity arrays serve as containers for confinem ...

2005

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