Change search
ReferencesLink to record
Permanent link

Direct link
Tuning the optical properties of planar photonic crystals by liquid crystal infiltration
Show others and affiliations
2005 (English)In: Proc SPIE Int Soc Opt Eng, 2005, 1-14 p.Conference paper (Refereed)
Abstract [en]

Recently there has been a growing amount of attention devoted to tuneable photonic crystals (PhCs) where the optical response of PhC structures can be dynamically modified. We will show how infiltrating planar PhCs with a synthetic organic material allows the trimming and tuning of their optical properties. The potential of PhC infiltration will be demonstrated for InP-based planar PhCs consisting of a hexagonal array of air holes (hole diameter = 200 - 400 nm; air filling factor = 0.40-0.50) etched through a planar waveguide in which light emitters (i.e. quantum wells) were embedded to enable optical measurements. The PhC pores were infiltrated with LC-K15 (5CB) nematic liquid crystals (LCs) in a specifically designed vacuum chamber, thereby changing the refractive index contrast between the holes and the semiconductor (trimming). Moreover, the possibility of tuning the optical response of PhCs by an external perturbation (i.e. temperature) was demonstrated. The change of the PhC optical properties due to infiltration and temperature tuning was studied both experimentally and theoretically. Experimental measurements were compared to theoretical calculations in order to obtain information on the in-filling efficiency, the LC refractive index, and the molecule orientation inside the holes. In the first case, optical measurements were performed as a function of temperature, whilst the average LC director configuration was determined by comparing transmission spectra in the transverse electric and magnetic polarization directions.

Place, publisher, year, edition, pages
2005. 1-14 p.
, Proceedings of SPIE - The International Society for Optical Engineering, ISSN 0277-786X ; 5926
Keyword [en]
Liquid crystals, Optical properties, Photonic crystals, Tuneable photonic bandgap materials, Perturbation techniques, Polarization, Semiconductor quantum wells, Vacuum, Optical responses, Planar photonic crystals
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-156513DOI: 10.1117/12.614837ScopusID: 2-s2.0-31844457293OAI: diva2:767345
Tuning the Optical Response of Photonic Bandgap Structures II, 31 July-1 August 2005, San Diego, CA, USA

QC 20141201

Available from: 2014-12-01 Created: 2014-11-28 Last updated: 2014-12-01Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Mulot, MikaelAnand, Srinivasan
By organisation
Microelectronics and Information Technology, IMIT
Atom and Molecular Physics and Optics

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: 8 hits
ReferencesLink to record
Permanent link

Direct link