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Intersubband Absorption in Quantum Dash Nanostructures

100%

Crnjanski J., Gvozdić D.

Acta Physica Polonica A

2009

vol. 116

issue 4

668-671

The band structure and corresponding intersubband absorption coefficient of quantum dash structures are modeled using a self-consistent single-band effective-mass approach and dipole approximation. Size fluctuation of the quantum dash ensemble, described with Gaussian distribution, is included in the model and its effects on the absorption spectrum are analyzed. The profile of the absorption spectrum is suitable for fitting with a sum of Gaussian functions. We find that the quantum dash ensemble has a pronounced and broad absorption spectrum in mid-infrared region, which becomes broader and more asymmetric with increase of the size fluctuation. In addition, for very large size fluctuation, the spectrum becomes flattened in relatively wide wavelength range.

Silicon Photonic Waveguides for Near- and Mid-Infrared Regions

52%

Stankovic S., Milosevic M., Timotijevic B., Yang P., Teo E., Crnjanski J., Matavulj P., Mashanovich G.

Acta Physica Polonica A

2007

vol. 112

issue 5

1019-1024

The basic building block of every photonic circuit is a waveguide. In this paper we investigate the most popular silicon waveguide structures in the form of a silicon-on-insulator rib waveguide. We also analyse two structures that can find applications in mid- and long-wave infrared regions: free-standing and hollow core omnidirectional waveguides.

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2 Acta Physica Polonica A

1 2009

1 2007

2 Crnjanski J.

1 Gvozdić D.

1 Mashanovich G.

1 Matavulj P.

1 Milosevic M.

1 Stankovic S.

1 Teo E.

1 Timotijevic B.

1 Yang P.

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Intersubband Absorption in Quantum Dash Nanostructures

Silicon Photonic Waveguides for Near- and Mid-Infrared Regions