Thermal emission from metallic films perforated with subwavelength hole arrays

Mohit Diwekar; Tatsunosuke Matsui; Amit Agrawal; Ajay Nahata; Z. Valy Vardeny

doi:10.1117/12.796091

28 August 2008 Thermal emission from metallic films perforated with subwavelength hole arrays

Mohit Diwekar, Tatsunosuke Matsui, Amit Agrawal, Ajay Nahata, Z. Valy Vardeny

Proceedings Volume 7033, Plasmonics: Nanoimaging, Nanofabrication, and Their Applications IV; 70331E (2008) https://doi.org/10.1117/12.796091
Event: NanoScience + Engineering, 2008, San Diego, California, United States

Abstract

This report presents an overview of our study on the optical transmission and thermal light emission properties of sub-wavelength hole arrays fabricated in a square lattice with 4 μm periodicity. The structures were fabricated in thin aluminum (Al) films on silicon (Si) substrates using conventional photolithography. The spectra were obtained using a Fourier transform infrared spectrometer with a port for an external cryostat configured for thermal emission measurements. The perforated films showed extraordinary transmission bands in the mid-infrared spectral range, which could be well explained as due to light coupling to surface plasmon-polaritons on the two film interfaces. We fitted the transmission spectra and calculated the absorption spectra of these structures using a model for the dielectric response that utilizes an effective plasma frequency determined by the individual holes, as well as several resonant modes associated with the reciprocal vectors in the lattice structure factor. We found that the thermal emission spectrum from the perforated films followed the transmission spectrum characteristics, rather than the obtained absorption spectrum; in apparent contrast to Kirchhoff's law of radiation. We conclude that the perforated films behave as radiation filters, where the thermal emission radiation is suppressed in the frequency range outside the transmission resonant bands in the spectrum.

Citation Download Citation

Mohit Diwekar, Tatsunosuke Matsui, Amit Agrawal, Ajay Nahata, and Z. Valy Vardeny "Thermal emission from metallic films perforated with subwavelength hole arrays", Proc. SPIE 7033, Plasmonics: Nanoimaging, Nanofabrication, and Their Applications IV, 70331E (28 August 2008); https://doi.org/10.1117/12.796091

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
14 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Photonic crystals

Metals

Dielectrics

Aluminum

Absorption

Interfaces

Plasma

Show All Keywords

Keywords/Phrases

Search In:

Publication Years