TY - JOUR
T1 - Surface plasmon interferometer in silicon-on-insulator
T2 - Novel concept for an integrated biosensor: Comment
AU - Levy, R.
AU - Ruschin, S.
PY - 2007/10/17
Y1 - 2007/10/17
N2 - We discuss inaccuracies associated with neglecting radiation modes in the calculation of waveguide mode propagation and sensitivity in "Surface plasmon interferometer in silicon-on-insulator: novel concept for an integrated biosensor" [Opt. Express 14, 7063-7072 (2006)]. Numeric calculation shows that due to the short length of the proposed waveguide structure, radiation modes cannot be ignored. When radiation modes are added to the calculation, sensitivity values decrease from above 10,000 dB/RIU to below 1000 dB/RIU. The influence of the radiation modes in such a short structure is due to the recapture of optical power from radiation modes by the output guide, thus reducing the contrast in the interference and the sensitivity.
AB - We discuss inaccuracies associated with neglecting radiation modes in the calculation of waveguide mode propagation and sensitivity in "Surface plasmon interferometer in silicon-on-insulator: novel concept for an integrated biosensor" [Opt. Express 14, 7063-7072 (2006)]. Numeric calculation shows that due to the short length of the proposed waveguide structure, radiation modes cannot be ignored. When radiation modes are added to the calculation, sensitivity values decrease from above 10,000 dB/RIU to below 1000 dB/RIU. The influence of the radiation modes in such a short structure is due to the recapture of optical power from radiation modes by the output guide, thus reducing the contrast in the interference and the sensitivity.
UR - http://www.scopus.com/inward/record.url?scp=35349029876&partnerID=8YFLogxK
U2 - 10.1364/OE.15.013649
DO - 10.1364/OE.15.013649
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AN - SCOPUS:35349029876
SN - 1094-4087
VL - 15
SP - 13649
EP - 13650
JO - Optics Express
JF - Optics Express
IS - 21
ER -