TY - JOUR
T1 - Electrical Generation of Polarized Broadband Radiation from an On-Chip Aligned Carbon Nanotube Film
AU - Matano, Shinichiro
AU - Takahashi, Hidenori
AU - Komatsu, Natsumi
AU - Shimura, Yui
AU - Nakagawa, Kenta
AU - Kono, Junichiro
AU - Maki, Hideyuki
N1 - Funding Information:
This work was partially financially supported by A-STEP (Grant Number JPMJTR20R4) from JST, and KAKENHI (Grant Number 16H04355, 23686055, 18K19025, and 20H02210) from JSPS. This work was technically supported by Spintronics Research Network of Japan, the Core-to-Core program from JSPS, NIMS Nanofabrication Platform in Nanotechnology Platform Project by MEXT, and Kanagawa Institute of Industrial Science and Technology (KISTEC). N.K. and J.K. acknowledge support by the Basic Energy Science (BES) program of the U.S. Department of Energy through Grant No. DE-FG02-06ER46308 (for preparation of aligned carbon nanotube films), the U.S. National Science Foundation through Grant No. ECCS-1708315 (for optical measurements), and the Robert A. Welch Foundation through Grant No. C-1509 (for structural characterization measurements).
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/4/4
Y1 - 2022/4/4
N2 - 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.
AB - 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.
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U2 - 10.1021/acsmaterialslett.2c00058
DO - 10.1021/acsmaterialslett.2c00058
M3 - Article
AN - SCOPUS:85126794452
SN - 2639-4979
VL - 4
SP - 626
EP - 633
JO - ACS Materials Letters
JF - ACS Materials Letters
IS - 4
ER -