Outputs (76)

The interaction of quantum well excitons with evanescent EM waves and the spectroscopy of waveguide polaritons (2005)
Presentation / Conference Contribution
Beggs, D., Kaliteevski, M., Brand, S., Abram, R., & Kavokin, A. (2004, July). The interaction of quantum well excitons with evanescent EM waves and the spectroscopy of waveguide polaritons. Presented at 27th International Conference on the Physics of Semiconductors : ICPS-27., Flagstaff, Arizona

A transfer matrix method has been used to calculate the dispersion relations of planar dielectric waveguides (WGs) containing quantum well (QW) excitons. It is found that WG polaritons are formed, whose dispersion displays the classic anti-crossing b... Read More about The interaction of quantum well excitons with evanescent EM waves and the spectroscopy of waveguide polaritons.

First-principles studies of the structural and electronic properties of poly-para-phenylene vinylene (2004)
Journal Article
Zheng, G., Clark, S., Brand, S., & Abram, R. (2004). First-principles studies of the structural and electronic properties of poly-para-phenylene vinylene. Journal of Physics: Condensed Matter, 16(47), 8609-8620. https://doi.org/10.1088/0953-8984/16/47/013

We present first-principles investigations of the structural and electronic properties of PPV in both the isolated chain and the crystalline state. The calculations are mainly based on the local density approximation within density functional theory.... Read More about First-principles studies of the structural and electronic properties of poly-para-phenylene vinylene.

Interaction of quantum well excitons with evanescent plane electromagnetic waves (2004)
Journal Article
Beggs, D., Kaliteevski, M., Brand, S., Abram, R., Nikolaev, V., & Kavokin, A. (2004). Interaction of quantum well excitons with evanescent plane electromagnetic waves. Journal of Physics: Condensed Matter, 16(20), 3401-3409. https://doi.org/10.1088/0953-8984/16/20/011

A formalism based on non-local dielectric response theory and Green function techniques has been developed to describe the interaction of quantum well excitons with an evanescent optical wave of a planar waveguide. Reflection spectra of a system in w... Read More about Interaction of quantum well excitons with evanescent plane electromagnetic waves.

Directionality of light transmission and reflection in two-dimensional Penrose tiled photonic quasicrystals (2004)
Journal Article
Kaliteevski, M., Brand, S., & Abram, R. (2004). Directionality of light transmission and reflection in two-dimensional Penrose tiled photonic quasicrystals. Journal of Physics: Condensed Matter, 16(8), 1269-1278. https://doi.org/10.1088/0953-8984/16/8/010

We have investigated the directionality in the reflection and transmission spectra of Penrose-type photonic quasicrystals. In the frequency interval considered, there are two omnidirectional stopbands. It is found that for the low-frequency stopband... Read More about Directionality of light transmission and reflection in two-dimensional Penrose tiled photonic quasicrystals.

Ab initio studies of strained wurtzite GaN surfaces (2004)
Journal Article
Timon, V., Brand, S., Clark, S., & Abram, R. (2004). Ab initio studies of strained wurtzite GaN surfaces. Journal of Physics: Condensed Matter, 16(4), 531-542. https://doi.org/10.1088/0953-8984/16/4/002

In GaN and other group III nitrides the considerable lattice mismatch with the substrates normally employed during growth, such as sapphire, 6H-SiC and ZnO, can lead to the presence of strain which may affect the surface properties. Here we have stud... Read More about Ab initio studies of strained wurtzite GaN surfaces.

Optimization of an optical filter with a square-shaped passband based on coupled microcavities (2004)
Journal Article
Beggs, D., Kaliteevski, M., Brand, S., & Abram, R. (2004). Optimization of an optical filter with a square-shaped passband based on coupled microcavities. Journal of Modern Optics, 51(3), 437-446. https://doi.org/10.1080/09500340408235535

An approach using simple analytical theory has been developed for the design of multilayered spectral optical filters based on coupled microcavities. The method has been applied to find the parameters of the optimal structure, providing a near square... Read More about Optimization of an optical filter with a square-shaped passband based on coupled microcavities.

The metrics of surface adsorbed small molecules on the Young's fringe dual-slab waveguide interferometer (2004)
Journal Article
Cross, G., Reeves, A., Brand, S., Swann, M., Peel, L., Freeman, N., & Lu, J. (2004). The metrics of surface adsorbed small molecules on the Young's fringe dual-slab waveguide interferometer. Journal of Physics D: Applied Physics, 37(1), 74-80. https://doi.org/10.1088/0022-3727/37/1/012

A method for analysing thin films using a dual-waveguide interferometric technique is described. Alternate dual polarization addressing of the interferometer sensor using a ferroelectric liquid crystal polarization switch allowed the opto-geometrical... Read More about The metrics of surface adsorbed small molecules on the Young's fringe dual-slab waveguide interferometer.

A new quantitative optical biosensor for protein characterisation (2003)
Journal Article
Cross, G., Reeves, A., Brand, S., Popplewell, J., Peel, L., Swann, M., & Freeman, N. (2003). A new quantitative optical biosensor for protein characterisation. Biosensors and Bioelectronics, 19(4), 383-390. https://doi.org/10.1016/s0956-5663%2803%2900203-3

A new optical biosensor is described based on a dual waveguide interferometric technique. By addressing the waveguide structure with alternate polarisations the optogeometrical properties (density and thickness) of adsorbed protein layers at the sens... Read More about A new quantitative optical biosensor for protein characterisation.

Appearance of photonic minibands in disordered photonic crystals (2003)
Journal Article
Kaliteevski, M., Manzanares Martinez, J., Cassagne, D., Albert, J., Brand, S., & Abram, R. (2003). Appearance of photonic minibands in disordered photonic crystals. Journal of Physics: Condensed Matter, 15(6), 785-790. https://doi.org/10.1088/0953-8984/15/6/305

We have demonstrated the appearance of photonic minibands within the photonic bandgaps of a disordered system represented by randomly distributed 'vacancies' of air cylinders. The positions of the photonic minibands are defined by the energies of the... Read More about Appearance of photonic minibands in disordered photonic crystals.

Diffraction and transmission of light in low-refractive index Penrose-tiled photonic quasicrystals (2001)
Journal Article
Kaliteevski, M., Brand, S., Abram, R., Krauss, T., Millar, P., & DeLa Rue, R. (2001). Diffraction and transmission of light in low-refractive index Penrose-tiled photonic quasicrystals. Journal of Physics: Condensed Matter, 13(46), 10459-10470. https://doi.org/10.1088/0953-8984/13/46/314

We report the measurements of the diffraction pattern of a two-dimensional Penrose-tiled photonic quasicrystal, obtained by etching air cylinders in a silica substrate, and the modelling of the light propagation and dispersion relations of photons in... Read More about Diffraction and transmission of light in low-refractive index Penrose-tiled photonic quasicrystals.