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Browsing by Subject "54th Annual Conference of the South African Institute of Physics"

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Demonstrating optical aberrations in the laboratory

Author: Naidoo, Darryl ; Mafusire, C ; Forbes, A Date: Jul 2009 An optical aberration is a distortion of an image as compared to the object due to defects in an optical system Read more
Experimental generation and application of the superposition of higher-order Bessel beams

Author: Dudley, Angela L ; Vasilyeu, R ; Forbes, A ; Khilo, N ; Ropot, P Date: Jul 2009 This presentation provides information on experimental generation and application of the superposition of higher-order Bessel beams. The superposition of zero order Bessel beams can be used to measure the radius of curvature of a reflecting ... Read more
Fabrication of selective solar absorbers using pulsed laser deposition

Author: Yalisi, B ; Katumba, G ; Forbes, A ; Pillay, SR Date: Jun 2009 Selective solar absorbers are devices that have been designed to absorb as much as possible of the solar radiation which is in the wavelength range of 0.3 to 2.5 µm and to minimise thermal emittance in the wavelength range from 2.5µm to the ... Read more
Optical trapping and tweezing using a spatial light modulator

Author: Ismail, Y ; Mclaren, MG ; Forbes, A Date: Jul 2009 This presentation provides information on optical trapping and tweezing using a spatial light modulator. Read more
Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements [Conference paper]

Author: Mbatha, N ; Malinga, S ; Sivakumar, V ; Pillay, S ; Bencherif, H Date: Jul 2009 Neutral atmosphere (including the MLT) and ionosphere are linked by energy and momentum transfer. Thus, this whole region forms a coupled system in which influences that originates at one height or in one region can have profound influence ... Read more
Superpositions of higher-order bessel beams and nondiffracting speckle fields - (SAIP 2009)

Author: Dudley, Angela L ; Vasilyeu, R ; Forbes, A ; Khilo, N ; Ropot, P Date: Jul 2009 This poster presents a mechanism for the generation of the superposition of higher-order Bessel beams, which implements a ring slit aperture and spatial light modulator (SLM). The experimental technique is also adapted to generate nondiffracting ... Read more
Ultrafast pump-probe spectroscopy of Zinc Phthalocynine (ZnPc) and light harvesting complex II (LHC II)

Author: Ombinda-Lemboumba, Saturnin ; Du Plessis, A ; Botha, L ; Roberts, DE ; Molukanele, P ; Sparrow, RW ; Rohwer, EG ; Steenkamp, CM Date: Jul 2009 The presentation discusses basic principles of pump-probe technique, possible transient absorption signals, LHC II and ZnPc, experimental setup, chirp measurement and correction methods. The results of the study, conclusion and future work ... Read more

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Browsing by Subject "54th Annual Conference of the South African Institute of Physics"

Browsing by Subject "54th Annual Conference of the South African Institute of Physics"

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