Strong light concentration at the subwavelength scale by a metallic hole-array structure

Autor:	Shawn-Yu Lin, Danhong Huang, Zu Po Yang, John Chun Chieh Chang, D. A. Cardimona
Rok vydání:	2009
Předmět:	Materials science Infrared business.industry Surface plasmon Nanophotonics Resonance Atomic and Molecular Physics and Optics Wavelength Optics Transmittance Optoelectronics Thin film business Plasmon
Zdroj:	Optics letters. 34(1)
ISSN:	0146-9592
Popis:	A metallic two-dimensional hole-array (2DHA) sample is successfully fabricated and its transmission property measured at mid-infrared wavelengths (lambda ~ 1.5-20 microm). At the plasmonic resonance, the 2DHA sample exhibits a normal incidence transmittance of 80% at lambda = 7.6 microm. This corresponds to more than twice as much light that is transmitted as it impinges directly on the holes at the maxima of transmittance. This exceedingly large enhancement is attributed to a strong plasmonic resonance and an effective light concentration through an ultrathin metal film of 50 nm. This advancement will pave the way to a much enhanced infrared detection using a simple and compact 2DHA architecture.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfc48c3d4af70dac659e5fb18c9fbab5 https://pubmed.ncbi.nlm.nih.gov/19241633 Zobrazit plný text záznamu