journal article·2022-04-04

Electrical Generation of Polarized Broadband Radiation from an On-Chip Aligned Carbon Nanotube Film

Shinichiro Matano, Hidenori Takahashi, Natsumi Komatsu, Yui Shimura, Kenta Nakagawa, Junichiro Kono, Hideyuki Maki

ACS Materials Letters· Volume 4· Issue 4
Publisher page

Abstract

Microsized light sources with polarized or broadband emission can be used for a variety of applications. However, the system directly generating polarized and broad-spectrum light without using polarizers has not been established. Here, we found that a nano-device of densely packed and highly aligned carbon nanotube (CNT) films on silicon chips can emit polarized light with a broad spectrum. We observed spatial emission patterns that are dependent on the angle between the electrical bias and the CNT alignment direction, which are caused not only by the large thermal conductivity anisotropy of the film but also by finite thermal conductance in the CNT-electrode contact. Utilizing the thermal and electrical anisotropy, strongly localized emission was achieved from a narrow (∼1 μm) strip of aligned CNTs connecting edges of two displaced electrodes. This device’s unique ability to directly generate polarized ultrabroadband radiation may greatly expand the range of applications of microsized light sources.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Carbon Nanotubes in Composites · Graphene research and applications · Nanowire Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan

Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States of America

Kanagawa Institute of Industrial Science and Technology (KISTEC), 705-1 Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan

Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States

Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States

Center for Spintronics Research Network, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan

Funding

Welch Foundation · Adaptable and Seamless Technology Transfer Program through Target-Driven R and D · Japan Society for the Promotion of Science · U.S. National Science Foundation · Basic Energy Science (BES) program of the U.S. Department of Energy

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