Temperature-dependent optical properties of low-loss plasmonic SrMoO3 thin films

Qian Peng; Yadong Qiao; Yang Liu

doi:10.3788/COL202321.053601

Journals >Chinese Optics Letters >Volume 21 >Issue 5 >Page 053601 > Article

Chinese Optics Letters
Vol. 21, Issue 5, 053601 (2023)

Temperature-dependent optical properties of low-loss plasmonic SrMoO₃ thin films

Qian Peng^1、2, Yadong Qiao³, and Yang Liu^1、*

Author Affiliations

¹School of Physics and Electronic-Information Engineering, Hubei Engineering University, Xiaogan 432000, China

²School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550025, China

³School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China

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DOI: 10.3788/COL202321.053601 Cite this Article Set citation alerts

Qian Peng, Yadong Qiao, Yang Liu. Temperature-dependent optical properties of low-loss plasmonic SrMoO₃ thin films[J]. Chinese Optics Letters, 2023, 21(5): 053601 Copy Citation Text

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(a) XRD patterns of the SMO films before and after heating to 800°C. The inset shows the subtle shift in (002) peak position. (b) ω rocking curve for the (002) peak of the unheated film. (c) Surface and cross-sectional morphology of the SMO film heated to 800°C.

Fig. 1. (a) XRD patterns of the SMO films before and after heating to 800°C. The inset shows the subtle shift in (002) peak position. (b) ω rocking curve for the (002) peak of the unheated film. (c) Surface and cross-sectional morphology of the SMO film heated to 800°C.

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Fig. 2. Electrical properties of the SMO films on LAO substrates at different temperatures.

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Fig. 3. Experimental and fitted values of (a) the real and (b) the imaginary parts of the dielectric function of the SMO film at 700°C.

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Fig. 4. (a) Real and (b) imaginary parts of the dielectric function of the SMO films at different temperatures. The purple horizontal dashed line in (a) represents the ENZ locations. The legend in (a) shows the temperature color coding for both the plots.

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Fig. 5. (a) Temperature-dependent propagation lengths of the SPPs and (b) quality factors of the LSPR calculated using the dielectric functions of the SMO films. The legend in (a) shows the temperature color coding for both the plots.

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Sample	L_SPP (µm) (at 23°C)	L_SPP (µm) (at 400°C–500°C)	L_SPP (µm) (at 600°C)	L_SPP (µm) (at 800°C)	L_SPP Change at the Largest Temperature (%)
200 nm Au	72.94	38.41 (500°C)			47.3
30 nm Au	40.49	11.35 (450°C)			72.0
200 nm TiN^[29]	5.56	4.44 (440°C)			41.9
30 nm TiN^[32]	5.14	4.25 (400°C)	3.47	3.18	43.4
200 nm SMO	20.25	3.01 (400°C)	1.72	0.73	96.4

Table 1. Comparison of L_SPP in Au^[15], TiN, and SMO at Different Temperatures and at 820 nm Wavelength

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Sample	Q_LSPR (at 23°C)	Q_LSPR (at 400°C–500°C)	Q_LSPR (at 600°C)	Q_LSPR (at 800°C)	Q_LSPR Change at the Largest Temperature (%)
200 nm Au	22.93	11.93 (500°C)			48.0
30 nm Au	13.05	3.50 (450°C)			73.2
200 nm TiN	2.9	1.91 (400°C)	1.52		65.2
30 nm TiN	2.78	2.22 (400°C)	1.78		48.2
200 nm SMO	4.81	1.72 (400°C)	1.31	0.90	81.3

Table 2. Comparison of Q_LSPR in Au^[15], TiN^[32], and SMO at Different Temperatures and at 820 nm Wavelength

Qian Peng, Yadong Qiao, Yang Liu. Temperature-dependent optical properties of low-loss plasmonic SrMoO₃ thin films[J]. Chinese Optics Letters, 2023, 21(5): 053601

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