Skip to main content

Research Repository

Advanced Search

All Outputs (9)

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.

Etched Bragg reflectors as two-dimensional photonic crystals (2004)
Journal Article
Beggs, D., Kaliteevski, M., & Abram, R. (2004). Etched Bragg reflectors as two-dimensional photonic crystals. Journal of Physics: Condensed Matter, 16(45), 8093-8099. https://doi.org/10.1088/0953-8984/16/45/031

We have studied GaAs/oxidized AlAs (AlOx) Bragg reflectors with etched air grooves running parallel to the growth direction. Such structures possess periodic modulation of the refractive index in two dimensions, and we have found that they have a pho... Read More about Etched Bragg reflectors as two-dimensional photonic crystals.

Analysis of the dynamics of a blue-violet In<SUB>x</SUB> Ga<SUB>1-x</SUB> N laser with a saturable absorber (2004)
Journal Article
Tronciu, V., Yamada, M., & Abram, R. (2004). Analysis of the dynamics of a blue-violet Inx Ga1-x N laser with a saturable absorber. Physical review E: Statistical, nonlinear, and soft matter physics, 70(2), https://doi.org/10.1103/physreve.70.026604

We report the results of numerical investigations of the dynamical behavior of a blue-violet InGaN laser with a specially incorporated saturable absorber. We have identified the nature of the bifurcation that occurs in the device dynamics and also th... Read More about Analysis of the dynamics of a blue-violet In<SUB>x</SUB> Ga<SUB>1-x</SUB> N laser with a saturable absorber.

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.

A theoretical and experimental investigation of the dynamics of tandem blue-violet lasers (2004)
Journal Article
Tronciu, V., Yamada, M., Kawakami, T., Ito, S., Ohno, T., Taneya, M., & Abram, R. (2004). A theoretical and experimental investigation of the dynamics of tandem blue-violet lasers. Optics Communications, 235(4-6), 409-414. https://doi.org/10.1016/j.optcom.2004.02.070

Theoretical and experimental investigations have been carried out to study the dynamics of blue–violet lasers with two regions that are adjacent in the longitudinal direction. The theoretical results show that both CW and self-pulsating operations ar... Read More about A theoretical and experimental investigation of the dynamics of tandem blue-violet lasers.

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.