uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Destruction of a Polaritonic Gap in a 2D Photonic Crystal
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2005 (English)In: Optics Communications, ISSN 0030-4018, E-ISSN 1873-0310, Vol. 252, no 4-6, 329-335 p.Article in journal (Refereed) Published
Abstract [en]

In a photonic crystal, an ionic material causes a wide polaritonic gap in the infrared region, induced by lattice resonances. A 2D square photonic crystal consisting of BeO cylinders in a dielectric matrix is studied by transfer matrix photonic band structure calculations. In particular it is shown under what conditions – in terms of the packing fraction of the cylinders, and the dielectric function of the matrix – the polaritonic gap can be destroyed.

Place, publisher, year, edition, pages
2005. Vol. 252, no 4-6, 329-335 p.
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-93206DOI: 10.1016/j.optcom.2005.04.023OAI: oai:DiVA.org:uu-93206DiVA: diva2:166615
Available from: 2005-05-13 Created: 2005-05-13 Last updated: 2013-05-29Bibliographically approved
In thesis
1. Numerical Studies of Energy Gaps in Photonic Crystals
Open this publication in new window or tab >>Numerical Studies of Energy Gaps in Photonic Crystals
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The concept of photonic crystals was born in the late 1980's when two important letters were published that showed the possibility to control light propagation by a periodic structure. A photonic crystals consists of two or more materials with different dielectric functions periodically arranged on the length scale of light. If the conditions are favorable, a gap will open in the dispersion relation, often called photonic band structure, and electromagnetic waves with frequency in the gap range cannot propagate through the photonic crystal.

In this thesis, mainly two types of structures and their properties have been numerically investigated: two-dimensional structures that are either square or triangular. In the calculations, both dielectric and polaritonic materials have been used. Polaritonic materials have an interval of high reflectance in the IR range, due to strong lattice resonances. Within such an interval, the real part of the dielectric function is negative, which causes a metal-like behavior. A polaritonic material, BeO has been introduced in photonic crystals to study the coexistence of structure and polaritonic gaps. Band structures and for some cases transmission spectra have been calculated to study the existence of complete gaps, i.e. energy intervals in which an incoming electromagnetic wave is totally reflected regardless of polarization and angle of incidence.

A brief discussion on signature management and thermal emission, and calculations for low-emittance coatings is included. It is shown that a 50-60µm layer of a 3D photonic crystal can be sufficient to achieve a thermal emittance of 20%.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2005. 83 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 67
Materials science, photonic crystals, polaritonic, periodic structures, Reststrahlen, band structure, energy gap, Materialvetenskap
National Category
Materials Engineering
urn:nbn:se:uu:diva-5848 (URN)91-554-6284-7 (ISBN)
Public defence
2005-06-03, Häggsalen, Ångströmlaboratoriet, Lägerhyddsvägen, Uppsala, 09:30 (English)
Available from: 2005-05-13 Created: 2005-05-13 Last updated: 2009-03-27Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
Solid State Physics
In the same journal
Optics Communications
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 382 hits
ReferencesLink to record
Permanent link

Direct link