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Bio-inspired Photonics

Dr Villads Egede Johansen

It is impossible to observe all the bright and brilliant colours in nature without demanding explanation! My research focuses on understanding the optical mechanisms governing colouration in natural photonics and biomimetic ditto. My work takes outset in Maxwell's equations from which light propagation and interaction is studied. This involves numerical simulations using FEM, FDTD and the transfer matrix method for multilayers and spherical particles. Theories not directly complying with Maxwell's equations like radiative transfer and scalar diffraction theory are also used when appropriate.

At the moment I work on understanding light reflection from flower petals and bacteria formations.

 

 

Publications

Topology optimization of microwave waveguide filters
N Aage, V Egede Johansen
– International Journal for Numerical Methods in Engineering
(2017)
Reproducing the hierarchy of disorder for Morpho-inspired, broad-angle color reflection.
B Song, VE Johansen, O Sigmund, JH Shin
– Scientific reports
(2017)
7,
46023
Simulation of reflectance from white-anodised aluminium surfaces using polyurethane-TiO2 composite coatings
VC Gudla, VE Johansen, S Canulescu, J Schou, R Ambat
– Journal of Materials Science
(2015)
50,
4565
Designing visual appearance using a structured surface
VE Johansen, LH Thamdrup, K Smistrup, T Nielsen, O Sigmund, P Vukusic
– Optica
(2015)
2,
239
Preparing the generalized Harvey-Shack rough surface scattering method for use with the discrete ordinates method
VE Johansen
– Journal of the Optical Society of America. A, Optics, image science, and vision
(2015)
32,
186
Appearance of anodised aluminium: Effect of alloy composition and prior surface finish
M Aggerbeck, S Canulescu, K Dirscherl, VE Johansen, S Engberg, J Schou, R Ambat
– Surface and Coatings Technology
(2014)
254,
28
Optical role of randomness for structured surfaces.
VE Johansen
– Appl Opt
(2014)
53,
2405
Design of structurally colored surfaces based on scalar diffraction theory
VE Johansen, J Andkjaer, O Sigmund
– Journal of the Optical Society of America B
(2014)
31,
207
Inverse design of nanostructured surfaces for color effects
J Andkjaer, VE Johansen, KS Friis, O Sigmund
– Journal of the Optical Society of America B
(2014)
31,
164
A 200 line topology optimization code written in Python
VE Johansen, N Aage
(2013)

Living Light 2018

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Postdoctoral researcher

Telephone number

01223 336410 (shared)

Email address

Research Interests