5 research outputs found
Non-linear optical deformation potentials in uniaxially strained ZnO microwires
The emission properties of bent ZnO microwires with diameters ranging from 1.5  μm to 7.3  μm are
systematically investigated by cathodoluminescence spectroscopy at T ≈ 10 K. We induced
uniaxial strains along the c-axis of up to ±2.9 %. At these high strain values, we observe a nonlinear
shift of the emission energy with respect to the induced strain, and the magnitude of the
energy shift depends on the sign of the strain. The linear and non-linear deformation potentials
were determined to be D1=−2.50±0.05 eV and D2=−15.0±0.5 eV, respectively. The nonlinearity
of the energy shift is also reflected in the observed spectral broadening of the emission
peak as a function of the locally induced strain, which decreases with increasing strain on the compressive
side and increases on the tensile side
Non-linear optical deformation potentials in uniaxially strained ZnO microwires
The emission properties of bent ZnO microwires with diameters ranging from 1.5  μm to 7.3  μm are
systematically investigated by cathodoluminescence spectroscopy at T ≈ 10 K. We induced
uniaxial strains along the c-axis of up to ±2.9 %. At these high strain values, we observe a nonlinear
shift of the emission energy with respect to the induced strain, and the magnitude of the
energy shift depends on the sign of the strain. The linear and non-linear deformation potentials
were determined to be D1=−2.50±0.05 eV and D2=−15.0±0.5 eV, respectively. The nonlinearity
of the energy shift is also reflected in the observed spectral broadening of the emission
peak as a function of the locally induced strain, which decreases with increasing strain on the compressive
side and increases on the tensile side
Non-linear optical deformation potentials in uniaxially strained ZnO microwires
The emission properties of bent ZnO microwires with diameters ranging from 1.5  μm to 7.3  μm are
systematically investigated by cathodoluminescence spectroscopy at T ≈ 10 K. We induced
uniaxial strains along the c-axis of up to ±2.9 %. At these high strain values, we observe a nonlinear
shift of the emission energy with respect to the induced strain, and the magnitude of the
energy shift depends on the sign of the strain. The linear and non-linear deformation potentials
were determined to be D1=−2.50±0.05 eV and D2=−15.0±0.5 eV, respectively. The nonlinearity
of the energy shift is also reflected in the observed spectral broadening of the emission
peak as a function of the locally induced strain, which decreases with increasing strain on the compressive
side and increases on the tensile side
High-order harmonic generation traces ultrafast coherent phonon dynamics in ZnO
Ultrafast coherent phonon dynamics in ZnO is studied via high-order harmonic generation by intense mid-IR laser pulses. We show, the phonon dynamic is very different after excitation in the tunnel and multiphoton regime
High-order harmonic generation traces ultrafast coherent phonon dynamics in ZnO
Ultrafast coherent phonon dynamics in ZnO is studied via high-order harmonic generation by intense mid-IR laser pulses. We show, the phonon dynamic is very different after excitation in the tunnel and multiphoton regime