Evanescent Wave Coupled Spectroscopic Sensing Using Smartphone

Author

Dutta, Suparna ; Choudhury, Alamgir ; Nath, Pabitra

Author_Institution

Dept. of Phys., Tezpur Univ., Tezpur, India

Volume

26

Issue

6

fYear

2014

fDate

15-Mar-14

Firstpage

568

Lastpage

570

Abstract

This letter demonstrates a technique that utilizes the camera of a smartphone for evanescent wave coupled spectroscopic sensing. Using simple optical components, the camera of the smartphone is converted into a highly resolved spectrometer (0.305 nm per pixel), and using a right-angled glass prism, the evanescent field of the internally reflected light signal from a broadband optical source is allowed to interact with the external medium. The primary advantages of the proposed sensing technique are its compactness, portability, and cost-efficiency.

Keywords

fibre optic sensors; optical glass; optical prisms; smart phones; visible spectroscopy; broadband optical source; evanescent field; evanescent wave coupled spectroscopic sensing; highly resolved spectrometer; internally reflected light signal; optical components; right-angled glass prism; smartphone camera; Biomedical optical imaging; Broadband communication; Cameras; Glass; Optical sensors; Optical surface waves; Smartphone; absorption spectroscopy; evanescent wave coupling; spectroscopic sensor;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2297700

Filename

6701355