Generación óptica impulsiva de pulsos de THz en dispositivos fotoconductivos semiconductores / Impulsive optical generation of THz pulses in photoconductive semiconductor

Mónaco, Francisco (2022) Generación óptica impulsiva de pulsos de THz en dispositivos fotoconductivos semiconductores / Impulsive optical generation of THz pulses in photoconductive semiconductor. Integration Project in Telecommunications Engineering, Universidad Nacional de Cuyo, Instituto Balseiro.

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Abstract in Spanish

Se estudian las bases para el cálculo, fabricación y uso de antenas fotoconductivas, PCA, en el rango THz. Se implementó una cadena de cálculo de emisión y recepción de las PCA, que fue satisfactoriamente validada. A partir de esta herramienta se evaluaron los parámetros fundamentales de las antenas. También se realizó una prospección de posibles formas geométricas de electrodos a fabricar a futuro. Se propusieron antenas de tipo dipolo corto y largo, para distintos escenarios de materiales semiconductores. En cuanto a la fabricación de las PCA, se inició la investigación del arseniuro de galio crecido a bajas temperaturas en el MBE de la División de Dispositivos y Sensores. Un total de 3 semiconductores fueron crecidos y se caracterizaron por reflectividad óptica. Se encontraron diferencias relativas entre ellos, compatibles con las con las diferencias en su crecimiento. Finalmente, respecto al uso, se trabajó un sistema de medición de pulsos ultra cortos para medir las señales de las PCA. Los desarrollos en el área incluyeron un software de control y adquisición de datos, mejoras a los sistemas de sincronismo, la estimación del desempeño del sistema utilizando la generación de segundo armónico, y la elaboración de manuales de operación.

Abstract in English

The fundamentals for the design, manufacture and use of photoconductive antennas , PCA, in the THz range are studied. A PCA emission and reception calculous chain was implemented, and satisfactorily validated. Trought this tool the fundamental parameters of the antennas were evaluated. A survey of possible geometric shapes of electrodes to be manufactured in the future was also carried out. Short and long Dipole type antennas were proposed for different semiconductor materials scenarios. Regarding the manufacture of PCA, research on Gallium Arsenide grown at low temperatures began at the Devices and Sensors Division. A total of 3 semiconductors were grown and characterized by optical reflectivity. Relative differences were found between them, compatible with the differences in their growth conditions. Finally, regarding antena operation, an ultra-short pulse measurement system for PCA signals was implemented. Developments in the area included control and data acquisition software, improvements to synchronism, estimation of system performance using second harmonic generation, and the confection of operating manuals.

Item Type:Thesis (Integration Project in Telecommunications Engineering)
Keywords:Spectroscopy; Espectroscopía; Antennas; Antenas; [Photoconductive antenna; Antena fotoconductiva]
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Subjects:Ingeniería en telecomunicaciones > Antenas
Divisions:Gcia. de área de Investigación y aplicaciones no nucleares > Departamento Ingeniería en Telecomunicaciones > Grupo de Comunicaciones Ópticas
ID Code:1140
Deposited By:Tamara Cárcamo
Deposited On:13 Apr 2023 15:08
Last Modified:13 Apr 2023 15:08

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