547 citations · 9.5k across the 169 of their papers we have counts for
12 papers · 1 filter
Enhanced circular dichroism via slow-light in dispersive structured media
Jesper Pedersen, Niels Asger Mortensen
Circular dichroism (CD) is in widespread use as a means of determining enantiomeric excess. We show how slow-light phenomena in dispersive structured media allow for a reduction in…
Comment on "Pinched Flow Fractionation: Continuous Size Separation of Particles Utilizing a Laminar Flow Profile in a Pinched Microchannel"
Niels Asger Mortensen
[First paragraph] In a recent paper Yamada et al. propose the novel concept of "pinched flow fractionation" (PFF) for the continuous size separation and analysis of particles in mi…
Slow-light enhanced optical detection in liquid-infiltrated photonic crystals
M. E. V. Pedersen, L. S. Rishoj, H. Steffensen +2
Slow-light enhanced optical detection in liquid-infiltrated photonic crystals is theoretically studied. Using a scattering-matrix approach and the Wigner-Smith delay time concept,…
Screening model for nanowire surface-charge sensors in liquid
Martin H. Sorensen, Niels Asger Mortensen, Mads Brandbyge
The conductance change of nanowire field-effect transistors is considered a highly sensitive probe for surface charge. However, Debye screening of relevant physiological liquid env…
Liquid-infiltrated photonic crystals - enhanced light-matter interactions for lab-on-a-chip applications
Niels Asger Mortensen, Sanshui Xiao, Jesper Pedersen
Optical techniques are finding widespread use in analytical chemistry for chemical and bio-chemical analysis. During the past decade, there has been an increasing emphasis on minia…
Air-clad fibers: pump absorption assisted by chaotic wave dynamics?
Niels Asger Mortensen
Wave chaos is a concept which has already proved its practical usefulness in design of double-clad fibers for cladding-pumped fiber lasers and fiber amplifiers. In general, classic…
Failure of standard approximations of the exchange coupling in nanostructures
Jesper Pedersen, Christian Flindt, Niels Asger Mortensen +1
We calculate the exchange coupling for a double dot system using a novel, numerically exact yet efficient technique, based on finite-element methods. Specifically, we evaluate the…
Enhanced transmission through arrays of subwavelength holes in gold films coated by a finite dielectric layer
Sanshui Xiao, Niels Asger Mortensen, Min Qiu
Enhanced transmissions through a gold film with arrays of subwavelength holes are theoretically studied, employing the rigid full vectorial three dimensional finite difference time…
Proposal of highly sensitive optofluidic sensors based on dispersive photonic crystal waveguides
Sanshui Xiao, Niels Asger Mortensen
Optofluidic sensors based on highly dispersive two-dimensional photonic crystal waveguides are theoretically studied. Results show that these structures are strongly sensitive to t…
Slow-light enhancement of Beer-Lambert-Bouguer absorption
Niels Asger Mortensen, Sanshui Xiao
We theoretically show how slow light in an optofluidic environment facilitates enhanced light-matter interactions, by orders of magnitude. The proposed concept provides strong oppo…
Bleaching and diffusion dynamics in optofluidic dye lasers
M. Gersborg-Hansen, S. Balslev, N. A. Mortensen +1
We have investigated the bleaching dynamics that occur in optofluidic dye lasers where the liquid laser dye in a microfluidic channel is locally bleached due to optical pumping. We…
Liquid-infiltrated photonic crystals: Ohmic dissipation and broadening of modes
Niels Asger Mortensen, Simon Ejsing, Sanshui Xiao
The pronounced light-matter interactions in photonic crystals make them interesting as opto-fludic "building blocks" for lab-on-a-chip applications. We show how conducting electrol…