Improved spatial resolution of the chemical imaging sensor with a hybrid illumination that suppresses lateral diffusion of photocarriers
- The chemical imaging sensor is a semiconductor-based chemical sensor capable of visualizing pH and ion distributions. The spatial resolution depends on the lateral diffusion of photocarriers generated by illumination of the semiconductor substrate. In this study, two types of optical setups, one based on a bundle of optical fibers and the other based on a binocular tube head, were developed to project a hybrid illumination of a modulated light beam and a ring-shaped constant illumination onto the sensor plate. An improved spatial resolution was realized by the ring-shaped constant illumination, which suppressed lateral diffusion of photocarriers by enhanced recombination due to the increased carrier concentration.
| Verfasserangaben: | Koichiro Miyamoto, Kosuke Seki, Takeyuki Suto, Frederik WernerORCiD, Torsten WagnerORCiD, Michael Josef SchöningORCiD, Tatsuo Yoshinobu |
|---|---|
| DOI: | https://doi.org/10.1016/j.snb.2018.07.016 |
| ISSN: | 0925-4005 |
| Titel des übergeordneten Werkes (Englisch): | Sensor and Actuators B: Chemical |
| Verlag: | Elsevier |
| Verlagsort: | Amsterdam |
| Dokumentart: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Erscheinungsjahr: | 2018 |
| Datum der Publikation (Server): | 22.10.2018 |
| Jahrgang: | 273 |
| Erste Seite: | 1328 |
| Letzte Seite: | 1333 |
| Link: | http://doi.org/10.1016/j.snb.2018.07.016 |
| Zugriffsart: | bezahl |
| Fachbereiche und Einrichtungen: | FH Aachen / Fachbereich Medizintechnik und Technomathematik |
| FH Aachen / INB - Institut für Nano- und Biotechnologien | |
| collections: | Verlag / Elsevier |
