236 citations · 694 across the 12 of their papers we have counts for
12 papers
Carrier diffusion in semiconductor nanoscale resonators
Marco Saldutti, Yi Yu, George Kountouris +2
It is shown that semiconductor nanoscale resonators with extreme dielectric confinement accelerate the diffusion of electron-hole pairs excited by nonlinear absorption. These novel…
The threshold of semiconductor nanolasers
Marco Saldutti, Yi Yu, Jesper Mørk
Nanolasers based on emerging dielectric cavities with deep sub-wavelength confinement of light offer a large light-matter coupling rate and a near-unity spontaneous emission factor…
Theory of Linewidth-Narrowing in Fano Lasers
Yi Yu, Aref Rasoulzadeh Zali, Jesper Mørk
We present a general theory for the coherence of Fano lasers based on a bound state in the continuum. We find that such lasers enable orders of magnitude reduction of the quantum-l…
Electrically-driven Photonic Crystal Lasers with Ultra-low Threshold
Evangelos Dimopoulos, Aurimas Sakanas, Andrey Marchevsky +5
Light sources with ultra-low energy consumption and high performance are required to realize optical interconnects for on-chip communication. Photonic crystal (PhC) nanocavity lase…
Suppression of coherence collapse in semiconductor Fano lasers
Thorsten S. Rasmussen, Yi Yu, Jesper Mork
We show that semiconductor Fano lasers strongly suppress dynamic instabilities induced by external optical feedback. A comparison with conventional Fabry-Perot lasers shows orders…
Maximizing the quality factor to mode volume ratio for ultra-small photonic crystal cavities
Fengwen Wang, Rasmus Ellebæk Christiansen, Yi Yu +2
Small manufacturing-tolerant photonic crystal cavities are systematically designed using topology optimization to enhance the ratio between quality factor and mode volume, Q/V. For…
Demonstration of a self-pulsing photonic crystal Fano laser
Yi Yu, Weiqi Xue, Elizaveta Semenova +2
Semiconductor lasers in use today rely on mirrors based on the reflection at a cleaved facet or Bragg reflection from a periodic stack of layers. Here, we demonstrate an ultra-smal…
Ultrafast coherent dynamics of a photonic crystal all-optical switch
Pierre Colman, Per Lunnemann, Yi Yu +1
We present pump-probe measurements of an all-optical photonic crystal switch based on a nanocavity, resolving fast coherent temporal dynamics. The measurements demonstrate the impo…
Threshold Characteristics of Slow-Light Photonic Crystal Lasers
Weiqi Xue, Yi Yu, Luisa Ottaviano +4
The threshold properties of photonic crystal quantum dot lasers operating in the slow-light regime are investigated experimentally and theoretically. Measurements show that, in con…
Nonreciprocal transmission in a photonic-crystal Fano structure enabled by symmetry breaking
Yi Yu, Yaohui Chen, Hao Hu +3
Nanostructures that feature nonreciprocal light transmission are highly desirable building blocks for realizing photonic integrated circuits. Here, a simple and ultra-compact photo…
Nonlinear switching dynamics in a photonic-crystal nanocavity
Yi Yu, Evarist Palushani, Mikkel Heuck +4
We measure the nonlinear switching dynamics of an InP photonic crystal nanocavity for different pulse energies and wavelengths relative to the cavity resonance and observe saturati…
Fano resonance control in a photonic crystal structure and its application to ultrafast switching
Yi Yu, Mikkel Heuck, Hao Hu +6
Fano resonances appear in quantum mechanical as well as classical systems as a result of the interference between two paths: one involving a discrete resonance and the other a cont…