®®®® SIIA Público

Título del libro: 2019 Photonics North, Pn 2019
Título del capítulo: Time-resolved spectroscopy of ethanol evaporation on free-standing porous silicon photonic microcavities

Autores UNAM:
JESUS EDUARDO LUGO ARCE;
Autores externos:

Idioma:

Año de publicación:
2019
Palabras clave:

Etching; Ethanol; Evaporation; Laser spectroscopy; Microcavities; Silicon photonics; Spectrometers; Crystalline silicons; Fiber-optic spectrometers; Localized modes; Phase Change; Porous silicon microcavities; Screen capture; Time windows; Time-resolved spectroscopy; Porous silicon


Resumen:

In this work, we have followed ethanol evaporation at two different concentrations (70% and 35%) using a fiber optic spectrometer and a screen capture application with a resolving capacity of 10 ms. Porous Silicon microcavities were fabricated by electrochemistry etching of crystalline silicon. The microcavities were designed to have a localized mode at 472 nm (blue band) and an extended mode at 750 nm (red band). Ethanol infiltration produces a redshift of approximately 17 nm. After a few minutes, a phase change from liquid to vapor occurs, and both modes shift back to the blue band. This process happens in a time window of only 60 ms. © 2019 IEEE.


Entidades citadas de la UNAM: