Sub-Hz Closed-Loop Electro-Optomechanical Oscillator with Gallium Phosphide Photonic Crystal Integrated on SoI Circuitry.

We report on a new approach of a low phase noise electro-optomechanical oscillator directly working in the GHz frequency range. The developed nanoscale oscillator is a one-dimensional photonic crystal made of gallium phosphide (GaP), heterogeneously integrated on silicon-on-insulator circuitry. Based on the strong interaction between the optical mode at the telecommunication wavelength and the mechanical mode in GHz, ultra-pure mechanical oscillations are enabled and directly imprinted on an optical carrier.

[Bilateral retinal detachments. Risk factors and treatment efficacy: 11 cases].

Purpose: The purpose of our study was to evaluate the incidence of bilateral retinal detachments and to analyze the risk factors for it and the anatomic and functional results of treatment.

Methods: Retinal detachment can be discovered in both eyes during an initial consultation. In other cases, retinal detachment may be seen in the second eye during follow-up of the first eye.

[Peribulbar anaesthesia for strabismus surgery].

Background: Strabismus surgery is underwent with general anaesthesia since it's a paediatric surgery in the majority of cases. The aim of our study is to analyse the safety and tolerance of peribulbar anaesthesia for strabismus surgery.

Patients And Methods: sixty two patients underwent strabismus surgery with a peribulbar anaesthesia.