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Quasiparticle Andreev scattering in the ν = 1/3 fractional quantum Hall regime
The scattering of exotic quasiparticles may follow different rules than electrons. In the fractional quantum Hall regime, a quantum point contact (QPC) provides a source of quasiparticles with field effect selectable charges and statistics, which can be scattered on …
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Quasi-deterministic nanowire growth
The vapor-solid-liquid growth of a semiconductor nanowire proceeds via the sequential nucleation and extension of biatomic monolayers (MLs) at the interface between the nanowire stem and an apical liquid catalyst nanodroplet. Controlling the length of a nanowire section to …
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Subwavelength Control of Photons and Phonons in Release-Free Silicon Optomechanical Resonators
Integrated optomechanics finds increasingly broadening applications, requiring tight confinement of photons and phonons within nanometric-scale photonic circuits. However, most existing integrated optomechanical devices use unconventional materials or suspended structures that hinder co-integration with scalable photonic technologies. Here, we show …
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Genetic optimization of Brillouin scattering gain in subwavelength-structured silicon membrane waveguides
On-chip Brillouin optomechanics has great potential for applications in communications, sensing, and quantum technologies. Tight confinement of near-infrared photons and gigahertz phonons in integrated waveguides remains a key challenge to achieving strong on-chip Brillouin gain. Here, we propose a …
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Integrated optoelectronics devices operating in the long wave infra red wavelength
Optical spectroscopy in the mid-infrared (mid-IR) range is an unambiguous way to detect environmental and toxic analytes. Therefore, mid-IR photonics has a great importance for many applications in sensing, imaging or even telecommunication. A challenging task is to make …
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