Issue 85, 2015

Chemical control of continuous light-steering using an array of gradient Au/Bi2Se3/Au strips

Abstract

Light-steering devices have been extensively investigated for a large host of applications in defense, communications, data storage and display technologies. However, the challenge is to continuously steer the light over a wide angular range in the optical region, using actively tunable structure with a small footprint. Here, we numerically demonstrate a gradient phase-array-like Au/Bi2Se3/Au trilayers plasmonic resonators for actively steering the beam in the near-infrared (N-IR) region. The proposed device provides a continuously large beam-steering of 18° for the reflected light and 9° for the transmitted light around the resonant wavelength of 1500 nm by changing the state of Bi2Se3 from amorphous to crystalline. The essence of this phenomenon lies in the variation of refractive index of Bi2Se3 induced by the phase transition, which is achieved through the chemical reactions between the Bi2Se3 film and AgNO3 solution. The continuous beam-steering is enabled by gradually increasing the immersion time (tim) of the Bi2Se3 into AgNO3 solution. This study exploits a new research area of Bi2Se3 based nano-antenna for dynamic optical routing and switching in photonic circuits.

Graphical abstract: Chemical control of continuous light-steering using an array of gradient Au/Bi2Se3/Au strips

Article information

Article type
Paper
Submitted
23 Jul 2015
Accepted
06 Aug 2015
First published
10 Aug 2015

RSC Adv., 2015,5, 69319-69324

Author version available

Chemical control of continuous light-steering using an array of gradient Au/Bi2Se3/Au strips

T. Cao, G. Zheng and S. Wang, RSC Adv., 2015, 5, 69319 DOI: 10.1039/C5RA13366A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements