Projekt

Computational discovery of new and better optical nanomaterials

Udbyder

Vejleder

Sted

København og omegn

A key concept in materials science is to engineer materials to have desired properties. The research field of nanoscale optics taps into this idea by controlling the optical properties of materials. Through judicious structuring of optical materials on the nanometer length scale, researchers can engineer optical resonances, which in turn provide control over different properties of light, such as amplitude and phase. This control has enabled exotic effects including invisibility cloaks, negative refraction, and ultrathin optical devices.

These optical effects rely on the availability of dielectric materials, which have a high refractive index [1]. Unfortunately, only few such materials are available in the visible spectrum [2], which limits the technological potential of all-dielectric nano-optics. Currently, the most used high-refractive-index materials are silicon (Si) and titanium dioxide (TiO2), since they are convenient to use due to the availability of well-tested fabrication methods. However, what if there are even better optical materials available that have not been discovered yet?

This project will use computational screening methods to search for new and better high-refractive-index materials. This will be done by employing density functional theory (DFT) calculations to compute the wavelength-dependent refractive index in the visible spectrum for hundreds of materials with band gaps in the range 1-3 eV. For the best candidates identified in the screening, the optical performance of the new materials is then tested through analytical electromagnetic Mie calculations.

This Master thesis project is at very forefront of current research, combining state-of-the-art DFT and nano-optics research.

References:

[1] A. I. Kuznetsov, A. E. Miroshnichenko, M. L. Brongersma, Y. S. Kivshar og B. Luk’yanchuk, "Optically resonant dielectric nanostructures," Science 354, 846 (2016).

[2] D. G. Baranov, D. A. Zuev, S. I. Lepeshov, O. V. Kotov, A. E. Krasnok, A. B. Evlyukhin og B. N. Chichkov, "All-dielectric nanophotonics: the quest for better materials and fabrication techniques," Optica 4, 814 (2017). 

Søg i opslag
Kontakt

Virksomhed/organisation

DTU Fysik

Navn

Søren Raza

Stilling

Adjunkt

Mail

sraz@dtu.dk

Vejleder-info

Kandidatuddannelsen i Fysik og Nanoteknologi

Vejleder

Søren Raza

Medvejledere

Kristian Sommer Thygesen

Type

Kandidatspeciale

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

Find os her

Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

Liste over EAN Numre

Job på DTU

Se alle jobs
 

loading..