Recently, nonreciprocal structures that violate Kirchhoff's law of thermal radiation have attracted considerable interest for their potential in solar energy harvesting applications. However, previous research has primarily focused on mid-infrared wavelengths rather than on the main solar wavelength range where sunlight intensity is concentrated. In this work, we theoretically demonstrate a nonreciprocal structure operating within the main solar spectrum, specifically tailored to meet the requirements of solar cell applications.

1.
G.
Kirchhoff
, “
On the relation between the radiating and absorbing powers of different bodies for light and heat
,”
London, Edinburg, Dublin, Philos. Mag. J. Sci.
20
,
1
21
(
1860
).
2.
A. D.
Vos
, “
Detailed balance limit of the efficiency of tandem solar cells
,”
J. Phys. D
13
,
839
(
1980
).
3.
A.
De Vos
and
H.
Pauwels
, “
On the thermodynamic limit of photovoltaic energy conversion
,”
Appl. Phys.
25
,
119
125
(
1981
).
4.
H.
Pauwels
and
A.
De Vos
, “
Determination of the maximum efficiency solar cell structure
,”
Solid-State Electron.
24
,
835
843
(
1981
).
5.
P. T.
Landsberg
and
G.
Tonge
, “
Thermodynamic energy conversion efficiencies
,”
J. Appl. Phys.
51
,
R1
R20
(
1980
).
6.
H.
Ries
, “
Complete and reversible absorption of radiation
,”
Appl. Phys. B
32
,
153
156
(
1983
).
7.
M.
Green
,
Third Generation Photovoltaics: Advanced Solar Energy Conversion, Springer Series in Photonics
(
Springer-Verlag
,
Berlin, Heidelberg
,
2003
).
8.
M. A.
Green
, “
Time-asymmetric photovoltaics
,”
Nano Lett.
12
,
5985
5988
(
2012
).
9.
L.
Zhu
and
S.
Fan
, “
Near-complete violation of detailed balance in thermal radiation
,”
Phys. Rev. B
90
,
220301
(
2014
).
10.
Y.
Park
,
B.
Zhao
, and
S.
Fan
, “
Reaching the ultimate efficiency of solar energy harvesting with a nonreciprocal multijunction solar cell
,”
Nano Lett.
22
,
448
452
(
2022
).
11.
D.
Jalas
,
A.
Petrov
,
M.
Eich
,
W.
Freude
,
S.
Fan
,
Z.
Yu
,
R.
Baets
,
M.
Popović
,
A.
Melloni
,
J. D.
Joannopoulos
,
M.
Vanwolleghem
,
C. R.
Doerr
, and
H.
Renner
, “
What is – and what is not – an optical isolator
,”
Nat. Photonics
7
,
579
582
(
2013
).
12.
V. S.
Asadchy
,
M. S.
Mirmoosa
,
A.
Díaz-Rubio
,
S.
Fan
, and
S. A.
Tretyakov
, “
Tutorial on electromagnetic nonreciprocity and its origins
,”
Proc. IEEE
108
,
1684
1727
(
2020
).
13.
S.
Yang
,
M.
Liu
,
C.
Zhao
,
S.
Fan
, and
C.-W.
Qiu
, “
Nonreciprocal thermal photonics
,”
Nat. Photonics
18
,
412
424
(
2024
).
14.
B.
Zhao
,
Y.
Shi
,
J.
Wang
,
Z.
Zhao
,
N.
Zhao
, and
S.
Fan
, “
Near-complete violation of Kirchhoff's law of thermal radiation with a 0.3T magnetic field
,”
Opt. Lett.
44
,
4203
4206
(
2019
).
15.
B.
Zhao
,
C.
Guo
,
C. A. C.
Garcia
,
P.
Narang
, and
S.
Fan
, “
Axion-field-enabled nonreciprocal thermal radiation in Weyl semimetals
,”
Nano Lett.
20
,
1923
1927
(
2020
).
16.
S.
Pajovic
,
Y.
Tsurimaki
,
X.
Qian
, and
G.
Chen
, “
Intrinsic nonreciprocal reflection and violation of Kirchhoff's law of radiation in planar type-I magnetic Weyl semimetal surfaces
,”
Phys. Rev. B
102
,
165417
(
2020
).
17.
Y.
Tsurimaki
,
X.
Qian
,
S.
Pajovic
,
F.
Han
,
M.
Li
, and
G.
Chen
, “
Large nonreciprocal absorption and emission of radiation in type-I Weyl semimetals with time reversal symmetry breaking
,”
Phys. Rev. B
101
,
165426
(
2020
).
18.
B.
Zhao
,
J.
Wang
,
Z.
Zhao
,
C.
Guo
,
Z.
Yu
, and
S.
Fan
, “
Nonreciprocal thermal emitters using metasurfaces with multiple diffraction channels
,”
Phys. Rev. Appl.
16
,
064001
(
2021
).
19.
Z.
Zhang
and
L.
Zhu
, “
Broadband nonreciprocal thermal emission
,”
Phys. Rev. Appl.
19
,
014013
(
2023
).
20.
C.
Du
and
B.
Zhao
, “
Controlling the ENZ profile for broadband nonreciprocal thermal emitters with high contrast between emissivity and absorptivity
,” in
Proceedings of the 10th International Symposium on Radiative Transfer
(
Begel House Inc
.,
2023
).
21.
J.
Wu
,
Y.
Sun
,
B.
Wu
,
Z.
Wang
, and
X.
Wu
, “
Extremely wide-angle nonreciprocal thermal emitters based on Weyl semimetals with dielectric grating structure
,”
Case Stud. Therm. Eng.
40
,
102566
(
2022
).
22.
Y.
Park
,
V. S.
Asadchy
,
B.
Zhao
,
C.
Guo
,
J.
Wang
, and
S.
Fan
, “
Violating Kirchhoff's law of thermal radiation in semitransparent structures
,”
ACS Photonics
8
,
2417
2424
(
2021
).
23.
M. F.
Picardi
,
V. I.
Moerbeek
,
M.
Pascale
, and
G. T.
Papadakis
, “
Nonreciprocity in transmission mode with planar structures for arbitrarily polarized light [Invited]
,”
Opt. Mater. Express
14
,
2201
2209
(
2024
).
24.
K. J.
Shayegan
,
S.
Biswas
,
B.
Zhao
,
S.
Fan
, and
H. A.
Atwater
, “
Direct observation of the violation of Kirchhoff's law of thermal radiation
,”
Nat. Photonics
17
,
891
896
(
2023
).
25.
K. J.
Shayegan
,
B.
Zhao
,
Y.
Kim
,
S.
Fan
, and
H. A.
Atwater
, “
Nonreciprocal infrared absorption via resonant magneto-optical coupling to InAs
,”
Sci. Adv.
8
,
eabm4308
(
2022
).
26.
M.
Liu
,
S.
Xia
,
W.
Wan
,
J.
Qin
,
H.
Li
,
C.
Zhao
,
L.
Bi
, and
C.-W.
Qiu
, “
Broadband mid-infrared non-reciprocal absorption using magnetized gradient epsilon-near-zero thin films
,”
Nat. Mater.
22
,
1196
1202
(
2023
).
27.
S.
Pajovic
,
Y.
Tsurimaki
,
X.
Qian
,
G.
Chen
, and
S. V.
Boriskina
, “
Nonreciprocal reflection of mid-infrared light by highly doped InAs at low magnetic fields
arXiv:2410.06596 (
2024
).
28.
M. Q.
Liu
and
C. Y.
Zhao
, “
Near-infrared nonreciprocal thermal emitters induced by asymmetric embedded eigenstates
,”
Int. J. Heat Mass Transfer
186
,
122435
(
2022
).
29.
D.
Vojna
,
O.
Slezák
,
A.
Lucianetti
, and
T.
Mocek
, “
Verdet constant of magneto-active materials developed for high-power faraday devices
,”
Appl. Sci.
9
,
3160
(
2019
).
30.
E. G.
Víllora
,
P.
Molina
,
M.
Nakamura
,
K.
Shimamura
,
T.
Hatanaka
,
A.
Funaki
, and
K.
Naoe
, “
Faraday rotator properties of {Tb3}[Sc1.95Lu0.05](Al3)O12, a highly transparent terbium-garnet for visible-infrared optical isolators
,”
Appl. Phys. Lett.
99
,
011111
(
2011
).
31.
M. Y. A.
Raja
,
D.
Allen
, and
W.
Sisk
, “
Room–temperature inverse Faraday effect in terbium gallium garnet
,”
Appl. Phys. Lett.
67
,
2123
2125
(
1995
).
32.
F.
Guo
,
J.
Ru
,
H.
Li
,
N.
Zhuang
,
B.
Zhao
, and
J.
Chen
, “
Growth and magneto-optical properties of LiTb(MoO4)2 crystal
,”
Appl. Phys. B
94
,
437
441
(
2009
).
33.
O.
Slezák
,
R.
Yasuhara
,
A.
Lucianetti
, and
T.
Mocek
, “
Temperature-wavelength dependence of terbium gallium garnet ceramics Verdet constant
,”
Opt. Mater. Express
6
,
3683
3691
(
2016
).
34.
S.
Fan
and
J. D.
Joannopoulos
, “
Analysis of guided resonances in photonic crystal slabs
,”
Phys. Rev. B
65
,
235112
(
2002
).
35.
K.
Papatryfonos
,
T.
Angelova
,
A.
Brimont
,
B.
Reid
,
S.
Guldin
,
P. R.
Smith
,
M.
Tang
,
K.
Li
,
A. J.
Seeds
,
H.
Liu
, and
D. R.
Selviah
, “
Refractive indices of MBE-grown AlxGa(1-x)As ternary alloys in the transparent wavelength region
,”
AIP Adv.
11
,
025327
(
2021
).
36.
L.
Gao
,
F.
Lemarchand
, and
M.
Lequime
, “
Refractive index determination of SiO2 layer in the UV/Vis/NIR range: Spectrophotometric reverse engineering on single and bi-layer designs
,”
J. Eur. Opt. Soc.: Rapid. Publ.
8
,
13010
(
2013
).
37.
S. S.
Wang
and
R.
Magnusson
, “
Theory and applications of guided-mode resonance filters
,”
Appl. Opt.
32
,
2606
2613
(
1993
).
38.
M. G.
Moharam
and
T. K.
Gaylord
, “
Rigorous coupled-wave analysis of planar-grating diffraction
,”
J. Opt. Soc. Am.
71
,
811
818
(
1981
).
39.
M. G.
Moharam
,
E. B.
Grann
,
D. A.
Pommet
, and
T. K.
Gaylord
, “
Formulation for stable and efficient implementation of the rigorous coupled-wave analysis of binary gratings
,”
J. Opt. Soc. Am. A
12
,
1068
1076
(
1995
).
40.
P.
Lalanne
and
G. M.
Morris
, “
Highly improved convergence of the coupled-wave method for TM polarization
,”
J. Opt. Soc. Am. A
13
,
779
784
(
1996
).
41.
G.
Granet
and
B.
Guizal
, “
Efficient implementation of the coupled-wave method for metallic lamellar gratings in TM polarization
,”
J. Opt. Soc. Am. A
13
,
1019
1023
(
1996
).
42.
L.
Li
, “
Use of Fourier series in the analysis of discontinuous periodic structures
,”
J. Opt. Soc. Am. A
13
,
1870
1876
(
1996
).
43.
K.
Rokushima
and
J.
Yamakita
, “
Analysis of anisotropic dielectric gratings
,”
J. Opt. Soc. Am.
73
,
901
908
(
1983
).
44.
L.
Li
, “
Reformulation of the Fourier modal method for surface-relief gratings made with anisotropic materials
,”
J. Mod. Optic.
45
,
1313
1334
(
1998
).
45.
L.
Li
, “
Fourier modal method for crossed anisotropic gratings with arbitrary permittivity and permeability tensors
,”
J. Opt. A
5
,
345
(
2003
).
46.
B.
Caballero
,
A.
García-Martín
, and
J. C.
Cuevas
, “
Generalized scattering-matrix approach for magneto-optics in periodically patterned multilayer systems
,”
Phys. Rev. B
85
,
245103
(
2012
).
47.
C.
Guo
,
B.
Zhao
, and
S.
Fan
, “
Adjoint Kirchhoff's law and general symmetry implications for all thermal emitters
,”
Phys. Rev. X
12
,
021023
(
2022
).
You do not currently have access to this content.