247 citations · 1.1k across the 36 of their papers we have counts for
35 papers · 1 filter
Twin-photon generation in a silicon nitride microresonator
Franz Pacher, Haochen Yan, Alekhya Ghosh +8
Photonic chips with silicon nitride () microring resonators are well established as heralded single-photon sources, but their operation as frequency-degenerate tw…
Fourth-harmonic UV light generation in integrated silicon nitride microresonators
Alekhya Ghosh, Arghadeep Pal, Haochen Yan +6
Integrated silicon nitride (Si3N4) resonators have emerged as a leading platform for nonlinear photonics, yet generating light at wavelength in the ultraviolet (UV) has remained el…
Color symmetry breaking in a nonlinear optical microcavity
Luca O. Trinchão, Alekhya Ghosh, Arghadeep Pal +8
Spontaneous symmetry breaking leads to diverse phenomena across the natural sciences, from the Higgs mechanism in particle physics to superconductors and collective animal behavior…
Scattering Induced Mode Chirality in Ring Resonators
Haochen Yan, Xu Guo, Arghadeep Pal +15
Non-Hermitian physics can be used to break time reversal symmetry and is important for interactions in a wide range of systems, from active matter and neural networks to metamateri…
Visualization of nonlinear optics in a microresonator
Hao Zhang, Haochen Yan, Alekhya Ghosh +10
A precise understanding of nonlinear optical phenomena in whispering gallery mode (WGM) microresonators is crucial for developing next-generation integrated photonic devices. Appli…
Simplified Aluminum Nitride Processing for Low-Loss Integrated Photonics and Nonlinear Optics
Haochen Yan, Shuangyou Zhang, Arghadeep Pal +12
Aluminum nitride (AlN) is an extremely promising material for integrated photonics because of the combination of strong \c{hi}2 and \c{hi}3 nonlinearities. However, the intrinsic h…
Inverse-Designed Silicon Nitride Nanophotonics
Toby Bi, Shuangyou Zhang, Egemen Bostan +12
Silicon nitride photonics has enabled integration of a variety of components for applications in linear and nonlinear optics, including telecommunications, optical clocks, astrocom…
Hybrid Nonlinear Effects in Photonic Integrated Circuits
Arghadeep Pal, Alekhya Ghosh, Shuangyou Zhang +5
Nonlinear optics in photonic integrated circuits is usually limited to utilizing the nonlinearity of a single material. In this work, we demonstrate the use of hybrid optical nonli…
Phase Symmetry Breaking of Counterpropagating Light in Microresonators for Switches and Logic Gates
Alekhya Ghosh, Arghadeep Pal, Shuangyou Zhang +3
The rapidly growing field of integrated photonics is enabling a large number of novel devices for optical data processing, neuromorphic computing and circuits for quantum photonics…
Linear and Nonlinear Coupling of Light in Twin-Resonators with Kerr Nonlinearity
Arghadeep Pal, Alekhya Ghosh, Shuangyou Zhang +6
Nonlinear effects in microresonators are efficient building blocks for all-optical computing and telecom systems. With the latest advances in microfabrication, coupled microresonat…
Controlled light distribution with coupled microresonator chains via Kerr symmetry breaking
Alekhya Ghosh, Arghadeep Pal, Lewis Hill +7
Within optical microresonators, the Kerr interaction of photons can lead to symmetry breaking of optical modes. In a ring resonator, this leads to the interesting effect that light…
Real-time imaging of standing-wave patterns in microresonators
Haochen Yan, Alekhya Ghosh, Arghadeep Pal +9
Real-time characterization of microresonator dynamics is important for many applications. In particular it is critical for near-field sensing and understanding light-matter interac…
Microresonator soliton frequency combs via cascaded Brillouin scattering
Hao Zhang, Shuangyou Zhang, Toby Bi +7
We demonstrate Kerr soliton frequency comb generation that is seeded by a cascaded Brillouin scattering process. In this process, a pump laser is used to generate multiple orders o…
Femtosecond pulse amplification on a chip
Mahmoud A. Gaafar, Markus Ludwig, Kai Wang +13
Femtosecond laser pulses enable the synthesis of light across the electromagnetic spectrum and provide access to ultrafast phenomena in physics, biology, and chemistry. Chip-integr…
On-the-fly precision spectroscopy with a dual-modulated tunable diode laser and Hz-level referencing to a cavity
Shuangyou Zhang, Toby Bi, Pascal Del'Haye
Advances in high-resolution laser spectroscopy have enabled many scientific breakthroughs in physics, chemistry, biology and astronomy. Optical frequency combs have pushed measurem…
Kerr Frequency Combs: A Million ways to fit light pulses into tiny rings
Aurélien Coillet, Shuangyou Zhang, Pascal Del'Haye
Frequency combs can be generated in millimeter-sized optical resonators thanks to their ability to store extremely high light intensities and the nonlinearity of their materials. N…
Room-Temperature Sputtered Ultralow-loss Silicon Nitride for Hybrid Photonic Integration
Shuangyou Zhang, Toby Bi, Irina Harder +5
Silicon-nitride-on-insulator photonic circuits have seen tremendous advances in many applications, such as on-chip frequency combs, Lidar, telecommunications, and spectroscopy. So…
Microresonator Soliton Frequency Combs in the Zero-Dispersion Regime
Shuangyou Zhang, Toby Bi, Pascal Del'Haye
Chip-scale optical frequency combs have attracted significant research interest and can be used in applications ranging from precision spectroscopy to telecom channel generators an…
Switching fronts, plateaus and Kerr oscillations of counterpropagating light in ring resonators
Graeme N. Campbell, Shuangyou Zhang, Leonardo Del Bino +2
We characterise stationary fronts and dark solitons for counterpropagating waves in micro-ring and fibre resonators with two input fields, normal dispersion and nonlocal coupling.…
A Kerr Polarization Controller
Niall Moroney, Leonardo Del Bino, Shuangyou Zhang +10
Kerr-effect-induced changes of the polarization state of light are well known in pulsed laser systems. An example is nonlinear polarization rotation, which is critical to the opera…
Dark-Bright Soliton Bound States in a Microresonator
Shuangyou Zhang, Toby Bi, George N. Ghalanos +3
The recent discovery of dissipative Kerr solitons in microresonators has facilitated the development of fully coherent, chip-scale frequency combs. In addition, dark soliton pulses…
Kerr-Nonlinearity-Induced Mode-Splitting in Optical Microresonators
George N. Ghalanos, Jonathan M. Silver, Leonardo Del Bino +5
The Kerr effect in optical microresonators plays an important role for integrated photonic devices and enables third harmonic generation, four-wave mixing, and the generation of mi…
Logic Gates based on Interaction of Counterpropagating Light in Microresonators
Niall Moroney, Leonardo Del Bino, Michael T. M. Woodley +5
Optical logic has the potential to replace electronics with photonic circuits in applications for which optic-to-electronic conversion is impractical and for integrated all-optical…
Spectral Extension and Synchronisation of Microcombs in a Single Microresonator
Shuangyou Zhang, Jonathan Silver, Pascal DelHaye
We demonstrate that the optical spectrum of a soliton microcomb generated in a microresonator can be coherently extended by using bichromatic pumping: one pump with a frequency in…