Beam steering in planar photonic crystal based on its anomalous dispersive properties

Autor:	Thomas F. Krauss, Michael Mazilu, Lijun Wu, J.-F. Gallet
Rok vydání:	2006
Předmět:	Materials science business.industry Beam steering General Engineering Physics::Optics Collimated light Superprism Wavelength Planar Optics Light beam Optoelectronics Hexagonal lattice business Photonic crystal
Zdroj:	Journal of Zhejiang University-SCIENCE A. 7:45-54
ISSN:	1862-1775 1673-565X
Popis:	We utilize the anomalous dispersion of planar photonic crystals near the dielectric band edge to control the wavelength-dependent propagation of light. We typically observe an angular swing of up to 10° as the input wavelength is changed from 1290 nm to 1310 nm, which signifies an angular dispersion of 0.5°/nm (“Superprism” phenomenon). Such a strong angular dispersion is of the order required for WDM systems. By tuning the incident angle, light beams with up to 20° divergence were collimated over a 25 nm (1285 nm to 1310 nm) bandwidth using a triangular lattice (“Supercollimator” phenomenon). The wavelength collimating range can be extended from 25 nm to 40 nm by changing the lattice from triangular to square. These two devices can be realized in the same configuration, simply by tuning the wavelength. Sources of loss are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2f38bb848a8e8339a98857aa13673635 https://doi.org/10.1631/jzus.2006.a0045 Zobrazit plný text záznamu Full text from SpringerLink