2 May 2014 On the effect of broadband, multi-angular excitation and detection in guided-mode resonance biosensors
Author Affiliations +
Guided mode resonance biosensors are of emerging interest as they allow integration on chip with fabrication on mass scale. The guided mode resonances (GMRs), observed in the transmission or reflection spectrum, are sensitive to refractive index changes in the vicinity of the photonic crystal (PhC) surface. Standard measurement setups utilize a collecting lens, focusing the extracted light intensity onto a single-point photo detector. In order to achieve highly miniaturized devices, we consider the integration of planar emitting and detector structures, such as organic light emitting diodes (OLEDs) and organic photo detectors (OPDs), together with the PhC based biosensors, on a single chip. This approach, however, consequently leads to a broadband, multi-angular light excitation as well as to a broadband and multi-angular contribution to the OPD photon count. While GMR effects in PhC slabs with directional light sources have been widely studied, this lens-less scenario requires a deep understanding regarding the broadband and the angular influence of both incident and reflected or transmitted light. We performed finite-difference time-domain (FDTD) calculations for GMR effects in two-dimensional (2D) PhC slabs. We study the effects for broadband emission in the visible spectrum, together with an angular incident beam divergence of up to 80°. We verified the simulated results by performing angle-resolved spectral measurements with a light emitting diode (LED) in a macroscopic, lens-less setup. We further utilize this numerical setup to provide a deeper understanding of the modal behaviour of our proposed OLED and OPD-based integrated biosensor concept.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniela Threm, Daniela Threm, Sabrina Jahns, Sabrina Jahns, Yousef Nazirizadeh, Yousef Nazirizadeh, Martin Ziegler, Martin Ziegler, Mirko Hansen, Mirko Hansen, Hermann Kohlstedt, Hermann Kohlstedt, Jost Adam, Jost Adam, Martina Gerken, Martina Gerken, "On the effect of broadband, multi-angular excitation and detection in guided-mode resonance biosensors", Proc. SPIE 9127, Photonic Crystal Materials and Devices XI, 91270X (2 May 2014); doi: 10.1117/12.2051907; https://doi.org/10.1117/12.2051907


A plastic optical fiber biosensor for e. coli
Proceedings of SPIE (May 12 2015)
LED collimation using high-index glass
Proceedings of SPIE (September 21 2011)
Microfluidic channel with built-in photonic crystal nanolaser
Proceedings of SPIE (September 10 2007)
Design and simulation of label free biosensor based on the...
Proceedings of SPIE (November 29 2011)
Surface plasmon resonance biosensor miniaturization
Proceedings of SPIE (October 20 1994)

Back to Top