کنفرانس مهندسی برق ایران

صفحه اصلی / سی و چهارمین کنفرانس بین المللی مهندسی برق

Photo-Thermoelectric Energy Conversion in Phase-Change Optical Nanoantennas: A Modeling Study

نویسندگان :

Daniyal Khoshmaram¹ Milad Jahangiri² Seyed Asad Amirhosseini³

1- Universitat Autònoma de Barcelona 2- دانشگاه شهید بهشتی 3- دانشگاه اصفهان

کلمات کلیدی :

NIR wavelength،Laser Gaussian beam،Photothermoelectric current effects،Ge2Sb2Te5 (GST)،Finite element method،Nanoantenna،Phase change material (PCM)،Effective medium theory

چکیده :

Phase-change chalcogenide materials such as Ge2Sb2Te5 (GST) enable rapid and reversible transitions between amorphous and crystalline phases, making them attractive for optically active nanoscale devices operating under elevated thermal conditions. In this work, a finite-element-based computational framework is developed to investigate photo-thermoelectric phenomena in a GST-integrated optical nanoantenna subjected to near-infrared Gaussian beam excitation at a wavelength of 1.55 μm. Optical absorption within the GST layer generates pronounced temperature gradients and current densities, which in turn induce thermoelectric currents and electric potential through the Seebeck effect. The coupled electromagnetic, thermal, and thermoelectric responses of the nanoantenna are analyzed as functions of excitation duration, temperature evolution, material phase state, and current distribution. The results demonstrate that thermoelectric contributions play a critical role in determining the voltage output and energy conversion efficiency of the device. These findings highlight the potential of phase-change material-based optical nanoantennas as compact energy transducers and multifunctional components for nanoscale energy harvesting and sensing applications.