Low-loss photonic crystal defect waveguides in InP

Kotlyar, M.V.; Karle, T.; Settle, M.D.; O'Faolain, L.; Krauss, T.F.
May 2004
Applied Physics Letters;5/3/2004, Vol. 84 Issue 18, p3588
Academic Journal
We have fabricated high-quality planar photonic crystal defect waveguides in InP/InGaAsP material. Using Fourier analysis of the Fabry-Pérot fringes obtained in transmission, we derive the propagation losses. Values as small as 1.8 dB/mm for waveguides consisting of three rows of missing holes (W3) were measured. We believe that the reduction in losses is due to the high quality of etching carried out using a high beam voltage–current ratio regime of chemically assisted ion-beam etching. © 2004 American Institute of Physics.


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