Abstract

We present a technique for refractive index sensing using a phase grating structure. A grating under normal incidence can be designed such that the first-order diffracted light travels at a diffraction angle of 90° with respect to the zeroth order. The diffracted light, which is along the direction of periodicity, can further be diffracted from the grating and interfere with the zeroth-order light. Under this condition, the π phase difference that arises between the two interfering beams results in a transmission dip. We can tune this dip wavelength for senor applications, based on the grating equation. This Letter presents both simulation and experimental data that show good agreement with each other.

© 2016 Optical Society of America

Full Article  |  PDF Article
More Like This
Ultra-sensitive refractive index sensor based on an extremely simple femtosecond-laser-induced structure

Pengcheng Chen, Xuewen Shu, Hanyuan Cao, and Kate Sugden
Opt. Lett. 42(6) 1157-1160 (2017)

Ultra-high-sensitivity refractive index sensor based on dual-microfiber coupler structure with the Vernier effect

Yuxuan Jiang, Yating Yi, Gilberto Brambilla, and Pengfei Wang
Opt. Lett. 45(5) 1268-1271 (2020)

High sensitivity refractive index sensor based on a tapered small core single-mode fiber structure

Dejun Liu, Arun Kumar Mallik, Jinhui Yuan, Chongxiu Yu, Gerald Farrell, Yuliya Semenova, and Qiang Wu
Opt. Lett. 40(17) 4166-4169 (2015)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription