View in EDS

Nonreciprocal photothermal effect of InSb square-hole cylinders in the mid-infrared region.

Saved in:
Bibliographic Details
Title: Nonreciprocal photothermal effect of InSb square-hole cylinders in the mid-infrared region.
Authors: Zhu, An1 (AUTHOR), Wang, Han1 (AUTHOR) wangh_njt@njtech.edu.cn
Source: Applied Physics A: Materials Science & Processing. May2026, Vol. 132 Issue 5, p1-19. 19p.
Subjects: Photothermal effect, Magnetooptics, Energy harvesting, Heat radiation & absorption, Mid-infrared lasers
Abstract: Magneto-optical (MO) effect can overcome the limitations of Kirchhoff's law, thereby opening new avenues for the design of highly efficient energy harvesting and conversion systems. Note that the nonradiative relaxation in MO semiconductors converts electromagnetic energy into thermal energy, in which the resulting temperature rise can be used to regulate their radiative capacity. However, previous studies have paid little attention to MO nonreciprocal structures based on indium antimonide (InSb) and to the nonreciprocal photothermal effects induced by such nonreciprocal thermal radiation. In this paper, the dielectric constant of InSb is described by the Lorentz-Drude model, and its reliability is verified against experimental data from the Palik's Handbook. A tunable magneto-optical nonreciprocal thermal radiator based on an InSb square-hole cylinder array is proposed. By introducing a square air cavity into the cylinder, the proposed structure achieves strong nonreciprocal thermal radiation at θ = 18° in the wavelength range of 5–5.5 μm, which represents the smallest operating angle reported thus far for InSb-based nonreciprocal structures. Under a 3 T magnetic field, incident light with an intensity of 1 mW/µm2 can produce a maximum nonreciprocal temperature difference of 124 K, thereby providing a condition for regulating the radiative power. The effects of structural parameters, including the square cavity side length, cylinder diameter, and cylinder height, on the radiative performance are systematically investigated. The enhancement mechanism of nonreciprocal thermal radiation in the square-hole cylinder is explained through analysis of the electric field energy distribution and the impedance characteristics. The influence of structural parameters on temperature rise is discussed from the perspectives of both the radiation spectrum and heat transfer efficiency. This work contributes to the future development of nonreciprocal thermal radiation and photothermal devices. [ABSTRACT FROM AUTHOR]
Copyright of Applied Physics A: Materials Science & Processing is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Magneto-optical (MO) effect can overcome the limitations of Kirchhoff's law, thereby opening new avenues for the design of highly efficient energy harvesting and conversion systems. Note that the nonradiative relaxation in MO semiconductors converts electromagnetic energy into thermal energy, in which the resulting temperature rise can be used to regulate their radiative capacity. However, previous studies have paid little attention to MO nonreciprocal structures based on indium antimonide (InSb) and to the nonreciprocal photothermal effects induced by such nonreciprocal thermal radiation. In this paper, the dielectric constant of InSb is described by the Lorentz-Drude model, and its reliability is verified against experimental data from the Palik's Handbook. A tunable magneto-optical nonreciprocal thermal radiator based on an InSb square-hole cylinder array is proposed. By introducing a square air cavity into the cylinder, the proposed structure achieves strong nonreciprocal thermal radiation at θ = 18° in the wavelength range of 5–5.5 μm, which represents the smallest operating angle reported thus far for InSb-based nonreciprocal structures. Under a 3 T magnetic field, incident light with an intensity of 1 mW/µm2 can produce a maximum nonreciprocal temperature difference of 124 K, thereby providing a condition for regulating the radiative power. The effects of structural parameters, including the square cavity side length, cylinder diameter, and cylinder height, on the radiative performance are systematically investigated. The enhancement mechanism of nonreciprocal thermal radiation in the square-hole cylinder is explained through analysis of the electric field energy distribution and the impedance characteristics. The influence of structural parameters on temperature rise is discussed from the perspectives of both the radiation spectrum and heat transfer efficiency. This work contributes to the future development of nonreciprocal thermal radiation and photothermal devices. [ABSTRACT FROM AUTHOR]
ISSN:09478396
DOI:10.1007/s00339-026-09607-x