Experimental observation of extremely weak optical scattering from an interlocking carbon nanotube array

Zu-Po Yang, Mei Li Hsieh, James A. Bur, Lijie Ci, Leonard M. Hanssen, Boris Wilthan, Pulickel M. Ajayan, Shawn Yu Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

We experimentally demonstrate a nearly wavelength-independent optical reflection from an extremely rough carbon nanotube sample. The sample is made of a vertically aligned nanotube array, is a super dark material, and exhibits a near-perfect blackbody emission at T=450K-600K. No other material exhibits such optical properties, i.e., ultralow reflectance accompanied by a lack of wavelength scaling behavior. This observation is a result of the lowest ever measured reflectance (R=0:0003) of the sample over a broad infrared wavelength of 3 μm < λ < 13 μm. This discovery may be attributed to the unique interlocking surface of the nanotube array, consisting of both a global, large scale and a short-range randomness.

Original languageEnglish
Pages (from-to)1850-1855
Number of pages6
JournalApplied Optics
Volume50
Issue number13
DOIs
StatePublished - 1 May 2011

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