Observation of Near-Field Thermal Radiation between Coplanar Nanodevices with Subwavelength Dimensions

被引:7
|
作者
Luo, Xiao [1 ]
Salihoglu, Hakan [1 ]
Wang, Zexiao [1 ]
Li, Zhuo [1 ]
Kim, Hyeonggyun [1 ]
Liu, Xiu [1 ]
Li, Jiayu [1 ]
Yu, Bowen [1 ]
Du, Shen [1 ]
Shen, Sheng [1 ]
机构
[1] Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA
基金
美国国家科学基金会; 美国安德鲁·梅隆基金会;
关键词
coplanar nanodevices; subwavelength dimensions; near-field thermal radiation; subwavelength confinements; thermal photonic nanodevices; HEAT-TRANSFER; ENHANCEMENT; POLARITONS;
D O I
10.1021/acs.nanolett.3c03748
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
With the continuous advancement of nanotechnology, nanodevices have become crucial components in computing, sensing, and energy conversion applications. The structures of nanodevices typically possess subwavelength dimensions and separations, which pose significant challenges for understanding energy transport phenomena in nanodevices. Here, on the basis of a judiciously designed thermal photonic nanodevice, we report the first measurement of near-field energy transport between two coplanar subwavelength structures over temperature bias up to similar to 190 K. Our experimental results demonstrate a 20-fold enhancement in energy transfer beyond blackbody radiation. In contrast with the well-established near-field interactions between two semi-infinite bodies, the subwavelength confinements in nanodevices lead to increased polariton scattering and reduction of supporting photonic modes and, therefore, a lower energy flow at a given separation. Our work unveils exciting opportunities for the rational design of nanodevices, particularly for coplanar near-field energy transport, with important implications for the development of efficient nanodevices for energy harvesting and thermal management.
引用
收藏
页码:1502 / 1509
页数:8
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