Cavity optomechanics with arrays of thick dielectric membranes

Optomechanical arrays made of structured flexible dielectrics are a promising system for exploring quantum and many-body optomechanical phenomena. We generalize investigations of the optomechanical properties of periodic arrays of one-dimensional scatterers in optical resonators to the case of vibrating membranes whose thickness is not necessarily small with respect to the optical wavelength of interest. The array optical transmission spectrum and its optomechanical coupling with a linear Fabry-Perot cavity field are investigated both analytically and numerically.Comment: 7 pages, 6 figure

Hybrid cavity mechanics with doped systems

We investigate the dynamics of a mechanical resonator in which is embedded an ensemble of two-level systems interacting with an optical cavity field. We show that this hybrid approach to optomechanics allows for enhanced effective interactions between the mechanics and the cavity field, leading for instance to ground state cooling of the mechanics, even in regimes, like the unresolved sideband regime, in which standard radiation pressure cooling would be inefficient.Comment: 9 pages, 4 figure

Extensive pelvic hydatid disease mimicking ovarian malignant tumour

Hydatid disease is one of the commonest parasitic infections of the liver, endemic in many countries. Rupture into the peritoneal cavity leading to secondary echinococcosis is a difficult problem to manage. A case of 37 year old female patient presenting with disseminated intra-abdominal hydatid disease mimicking malignant multilocular cystic tumor of the ovary involving the mesentery of the small intestine, omentum and spleen is presented along with a brief review of literature

Psammomatous ossifying fibroma of frontal sinus: a case report with review of literature

Psammomatoid Ossifying Fibroma (POF) is a rare, slowly progressive benign tumor of the extragnathic craniofacial bones representing a subgroup of related fibro-osseous lesions with a tendency towards locally aggressive behaviour unique to the nasal cavity, paranasal sinuses, orbit and is often misdiagnosed. Histologically they are benign, but clinically they are locally aggressive. We report a case of a 17 year-old boy who presented with psammamatous ossifying fibroma of the frontal sinus. The location of this tumor made this case unusual