Design of High-Reflectance Fabry-Perot Interference-Cavity Plane Mirror and Measurement of Terahertz Wavelength

Fig. 8. Comparison of transmission peak and fineness. Transmission peaks at different frequencies of (a) 0.096 THz, (b) 0.14 THz and (c) 0.315 THz; (d) interference stripe fineness

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Table 1. Structural parameters of the minimum periodic unit in metal grid
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Table 1. Structural parameters of the minimum periodic unit in metal grid
Parameter h g w r t a b
Value 100 65 20.3 9.1 0.1 15.2 7.9

Table 2. Wavelength measurement results and errors of THz sources at different frequencies

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Table 2. Wavelength measurement results and errors of THz sources at different frequencies

Number	0.096 THz		0.14 THz		0.315 THz
Number	Si	Design	Si	Design	Si	Design
1	3120	3160	2160	2160	960	960
2	3120	3080	2200	2120	920	960
3	3080	3120	2160	2160	980	970
4	3080	3120	2120	2160	940	940
Average	3100	3120	2160	2150	950	957.5
Error/%	0.81	0.16	0.80	0.33	0.25	0.54

Table 3. Half-height contrast of transmission peaks of THz sources at different frequencies
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Table 3. Half-height contrast of transmission peaks of THz sources at different frequencies
Number 0.096 THz 0.14 THz 0.315 THz
Si Design Si Design Si Design
Average 370 72 194 58 134 44
1 370 50 180 50 160 40
2 360 70 200 50 130 40
3 390 70 190 60 140 40
4 360 100 210 50 120 50
5 370 70 190 80 120 50

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Wentao Liao, Shangzhong Jin, Hongguang Li, Yufeng Guo, Qi Xie. Design of High-Reflectance Fabry-Perot Interference-Cavity Plane Mirror and Measurement of Terahertz Wavelength[J]. Laser & Optoelectronics Progress, 2024, 61(21): 2112002

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Paper Information

Category: Instrumentation, Measurement and Metrology

Received: Nov. 30, 2023

Accepted: Feb. 27, 2024

Published Online: Nov. 8, 2024

The Author Email: Wentao Liao (lwt9926@163.com)

DOI:10.3788/LOP232585

CSTR:32186.14.LOP232585

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Structural parameters of the minimum periodic unit in metal grid

Table 1. Structural parameters of the minimum periodic unit in metal grid

Table 2. Wavelength measurement results and errors of THz sources at different frequencies

Table 2. Wavelength measurement results and errors of THz sources at different frequencies

Table 3. Half-height contrast of transmission peaks of THz sources at different frequencies

Table 3. Half-height contrast of transmission peaks of THz sources at different frequencies