Title :
Sensitivity of triangular resonator with long evanescent field around critical angle
Author :
Kim, D.G. ; Oh, Geum Yoon ; Kim, H.J. ; Kim, S.H. ; Ki, Hyun Chul ; Ko, H.J. ; Han, M.S. ; Hann, Sungyun ; Kim, Tae Un ; Lim, J.W. ; Kim, H.J. ; Choi, Y.W.
Author_Institution :
Photonics Device Team, Korea Photonics Technol. Inst., Gwangju, South Korea
Abstract :
A novel triangular resonator with a long evanescent field around the critical angle has been analysed and demonstrated for the first time. The sensitivity of the resonance shift used for changing the refractive index of 1 ?? 10-5 at the incidence angle of 18?? is 1.04 ?? 10-7 nm/RIU for transverse magnetic polarised light. An extinction ratio of 6 dB was observed near 1550 nm, where the incidence angle of the total internal reflection mirror inside the resonator was 18??.
Keywords :
light polarisation; micromirrors; optical resonators; refractive index; critical angle; internal reflection mirror; long evanescent field; refractive index; resonance shift sensitivity; transverse magnetic polarised light; triangular resonator;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.3536
