Abstract
The impact of moisture diffusivity on the free surface of an elastic non-local semiconductor medium for a one-dimensional (1D) deformation is examined using a novel model. The problem is designed to investigate how moisture diffusivity processes and plasma, thermo-elastic waves interact when laser pulses are present. The study is carried out while a photo-thermoelasticity transport process with moisture diffusivity is in existence. The governing equations for elastic waves, carrier density, heat conduction equation, moisture equation, and constitutive relationships for the photo-thermo-elastic media are determined using the Laplace transform technique. The fundamental physical quantities in the Laplace domain are obtained by applying mechanical stresses, temperature, and plasma boundary conditions. For the primary physical domains under study, the inversion of the Laplace transform using a numerical approach is used to find full solutions in the time domain. Graphical discussions have been made of the effects of thermal memory, laser pulses, and reference moisture parameters on the displacement component, moisture concentration, carrier density, force stress, and temperature distribution.
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Abbreviations
- \(\lambda ,\mu\) :
-
Lame’s elastic semiconductor parameters
- \({\delta }_{n}=\left(3\lambda +2\mu \right){d}_{n}\) :
-
The deformation potential difference
- \({T}_{0}\) :
-
Reference temperature in its natural state
- \({\gamma }_{t}=\left(3\lambda +2\mu \right){\alpha }_{T}\) :
-
The volume thermal expansion
- \({N}_{0}\) :
-
The equilibrium carrier concentration
- \(\rho\) :
-
The density of the non-local medium
- \({\alpha }_{T}\) :
-
Coefficients of linear thermal expansion
- \({C}_{e}\) :
-
Specific heat of the microelongated material at constant strain
- \(k\) :
-
The thermal conductivity
- \({D}_{E}\) :
-
The carrier diffusion coefficient
- \(\tau\) :
-
The carrier lifetime
- \({E}_{g}\) :
-
The energy gap
- \({d}_{n}\) :
-
The coefficients of electronic deformation
- \({\beta }_{ij}\), \({\beta }_{ij}^{m}\) :
-
The isothermal and elastic coupling coefficients of moisture
- \({\varepsilon }_{kl}\) :
-
The strain tensor
- \({C}_{\text{ijkl}}\) :
-
The isothermal parameters tensor
- \({\tau }_{0},{\nu }_{0}\) :
-
Thermal relaxation times
- \({D}_{T}\) :
-
The temperature diffusivity
- \({D}_{m}\) :
-
The diffusion coefficient of moisture
- \({\sigma }_{ij}\) :
-
The stress tensor
- \({\delta }_{ik}\) :
-
Kronecker delta
- \({D}_{T}^{m}\), \({D}_{m}^{T}\) :
-
The coupled diffusivities
- \({m}_{0}\) :
-
The reference moisture
- \({k}_{m}\) :
-
The moisture diffusivity
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Acknowledgements
The authors extend their appreciation to Princess Nourah bint Abdulrahman University for fund this research under Researchers Supporting Project number (PNURSP2023R154) Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.
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Kh. Lotfy: Conceptualization, Methodology, Software, Data curation. S. El-Sapa: Writing- Original draft preparation. M. Ahmed: Supervision, Visualization, Investigation, Software, Validation. A. El-Bary: Writing- Reviewing and Editing.
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El-Sapa, S., Lotfy, K., El-Bary, A.A. et al. Moisture Diffusivity and Photothermal Excitation in Non-Local Semiconductor Materials with Laser Pulses. Silicon 15, 4489–4500 (2023). https://doi.org/10.1007/s12633-023-02333-6
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DOI: https://doi.org/10.1007/s12633-023-02333-6