Abstract

Improving smartphones to offer increased utility is of great interest to users. Some devices like SPR sensors [1] or photonics crystal biosensor [2] have been demonstrated but these devices need a lot of hardware added-on to the phone, are not integrated and consume additional space. Our approach is to use a 750 µm thick smartphone protective glass and write photonic structures in it. We have already demonstrate a low loss single mode waveguide which have been use to build a Mach-Zehnder based temperature sensor [3]. One problem with these waveguides is the low refractive index change, around 10⁻⁵, which gives us a numerical aperture of 0.008 limiting the device prospects inside the bulk glass.

© 2017 IEEE