LAUSR

ABSTRACT Simultaneous effects of hydrostatic pressure and the geometrical confinement on the excitonic and some nonlinear optical properties of an exciton confined in an InP/ZnS core/shell quantum dot are investigated. Pressure associated exciton binding energy, oscillator strength, absorption coefficient, changes of refractive index and optical Raman gain are brought out for various values of ratio of radii of core/shell quantum dot. The results show that the binding energy of the exciton enhances with the application of hydrostatic pressure for all the ratio of radii. The enhancement of resonance amplitude and shifting towards the higher energies in absorption spectra is noted with the applied pressure and the peak values of refraction properties are found to reduce monotonically. The bare broad Raman band is observed at 335 cm−1 and this band shifts towards the higher values when the hydrostatic pressure is applied. They are in good agreement with the existing available literature.