Enhancement of the spatial resolution of the chemical imaging sensor by a hybrid fiber-Optic illumination

K. Miyamoto, K. Seki, Y. Guo, T. Wagner, M. J. Schöning, T. Yoshinobu

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)

Abstract

The chemical imaging sensor, which is based on the principle of the light-addressable potentiometric sensor (LAPS), is a powerful tool to visualize the spatial distribution of chemical species on the sensor surface. The spatial resolution of this sensor depends on the diffusion of photocarriers excited by a modulated light. In this study, a novel hybrid fiber-optic illumination was developed to enhance the spatial resolution. It consists of a modulated light probe to generate a photocurrent signal and a ring of constant light, which suppresses the lateral diffusion of minority carriers excited by the modulated light. It is demonstrated that the spatial resolution was improved from 92 μm to 68 μm.

Original languageEnglish
Pages (from-to)612-615
Number of pages4
JournalProcedia Engineering
Volume87
DOIs
Publication statusPublished - 2014
Event28th European Conference on Solid-State Transducers, EUROSENSORS 2014 - Brescia, Italy
Duration: 2014 Sep 72014 Sep 10

ASJC Scopus subject areas

  • Engineering(all)

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