Library topic

Peer-reviewed articles

• P. G. Hermannsson, C. Vannahme, C. L. C. Smith & A. Kristensen. Accurate wavelength prediction of photonic crystal resonant reflection and applications in refractive index measurement. Sensors IEEE

  In the past decade, photonic crystal resonant reflectors have been increasingly used as the basis for label-free biochemical assays in lab-on-a-chip applications.

• P. G. Hermannsson, C. Vannahme, C. L. C. Smith, & A. Kristensen. Absolute analytical prediction of photonic crystal guided mode resonance wavelengths. Appl. Phys. Lett. 105, 071103 (2014)

  A class of photonic crystal resonant reflectors known as guided mode resonant filters are optical structures that are widely used in the field of refractive index sensing, particularly in biosensing.

• P. Hermannsson, K. Sørensen, C. Vannahme, C. Smith, J. Klein, M. Russew, G. Grützner, and A. Kristensen, “All-polymer photonic crystal slab sensor,” Opt. Express 23, 16529-16539 (2015).

  An all-polymer photonic crystal slab sensor is presented, and shown to exhibit narrow resonant reflection with a FWHM of less than 1 nm and a sensitivity of 31 nm/RIU. This results in a detection limit of 4.5 × 10^(−6) RIU.

• P.G. Hermannsson, C. Vannahme, C.L.C. Smith, K.T. Sørensen, A. Kristensen. Refractive index dispersion sensing using an array of photonic crystal resonant reflectors. Applied Physics Letters 107 (6)

  Refractive index sensing plays a key role in various environmental and biological sensing applications. A method is presented for measuring the absolute refractive index dispersion of liquids using an array of photonic crystal resonant reflectors.

• Tølbøl Sørensen, K.; Kristensen, A. Label-Free Monitoring of Diffusion in Microfluidics. Micromachines 2017, 8, 329. DOI: 10.3390/mi8110329

  Label-free, real-time detection of concentration gradients is demonstrated. The recorded diffusion profiles reveal root-mean-square diffusion lengths for non-fluorescing and non-absorbing molecules, small (glucose, 180 Da) and large (BSA, 67 kDa).

• Vannahme, C., Dufva, M. & Kristensen, A. High frame rate multi-resonance imaging refractometry with distributed feedback dye laser sensor. Light Sci Appl 4, e269 (2015). DOI:10.1038/10.1038/lsa.2015.4

  High frame rate and highly sensitive imaging of refractive index changes on a surface is very promising for studying the dynamics of dissolution, mixing and biological processes without the need for labeling.

• Vannahme, C., Sørensen, K. T., Gade, C., Dufva, M., & Kristensen, A. (2015). Refractometric monitoring of dissolution and fluid flow. Optics Express, 23(5), 6562-6568

  Monitoring the dissolution of solid material in liquids and monitoring of fluid flow is of significant interest for applications in chemistry, food production, medicine, and especially in the fields of microfluidics and lab on a chip.