Laser-terahertz emission readout of chemical sensors

T. Kiwa, J. Kondo, S. Oka, I. Kawayama, H. Yamada, M. Tonouchi, K. Tsukada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new type of laser-terahertz emission system for the non-contact investigation of the chemical solutions has been developed. This system monitors the terahertz emission from a sensing plate, which consists of a silicon oxide and a silicon thin film layers on the sapphire substrate. The sensing of chemical solutions with the pH value between 1.68 and 10.01 was demonstrated. The amplitude of terahertz emission from the sensing plate increased with increasing the pH value. This change in the amplitude was caused by the change of the depletion layers of the silicon thin film when protons adsorbed at the surface of the sensing plate. This result indicates that fully non-contact monitoring of chemical solutions can be possible using the laser-terahertz emission system.

Original languageEnglish
Title of host publicationTRANSDUCERS and EUROSENSORS '07 - 4th International Conference on Solid-State Sensors, Actuators and Microsystems
Pages1915-1918
Number of pages4
DOIs
Publication statusPublished - Dec 1 2007
Event4th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS '07 - Lyon, France
Duration: Jun 10 2007Jun 14 2007

Publication series

NameTRANSDUCERS and EUROSENSORS '07 - 4th International Conference on Solid-State Sensors, Actuators and Microsystems

Other

Other4th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS '07
CountryFrance
CityLyon
Period6/10/076/14/07

Keywords

  • Chemical sensor
  • Terahertz
  • Ultrafast laser

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Laser-terahertz emission readout of chemical sensors'. Together they form a unique fingerprint.

Cite this