Influence of intensity loss in the cavity of a folded Fabry-Perot interferometer on interferometric signals

Shyu, Lih-Horng; Chang, Cheng-Yuan; Wang, Yung-Cheng

doi:10.1063/1.3596451

Cited by 12 publications

(7 citation statements)

References 7 publications

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“…3(b) for the Au samples with 120 nm of slit width and thicknesses of 120, 180, 260, 360, and 450 nm, we determine the reflectivities R ¼ 0:66, 0.99, 0.79, 0.98, and 0.91, and the resultant finesses F ¼ 7:45, 312.58, 13.27, 155.49, and 33.29, respectively. Here it is important to point out that for an FP cavity, the definition of quality factor (Q factor) is equivalent to the finesse [26]. Therefore, we can clearly see that both the R and Q factor values are significantly affected by the film thickness for a fixed slit width.…”

Section: Resultsmentioning

confidence: 99%

Influence of film thickness on the optical transmission through subwavelength single slits in metallic thin films

et al. 2011

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Silver and gold films with thicknesses in the range of 120-450 nm were evaporated onto glass substrates. A sequence of slits with widths varying between 70 and 270 nm was milled in the films using a focused gallium ion beam. We have undertaken high-resolution measurements of the optical transmission through the single slits with 488:0 nm (for Ag) and 632:8 nm (for Au) laser sources aligned to the optical axis of a microscope. Based on the present experimental results, it was possible to observe that (1) the slit transmission is notably affected by the film thickness, which presents a damped oscillatory behavior as the thickness is augmented, and (2) the transmission increases linearly with increasing slit width for a fixed film thickness.

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Section: Resultsmentioning

confidence: 99%

Influence of film thickness on the optical transmission through subwavelength single slits in metallic thin films

et al. 2011

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“…10(b) for the Au samples with 120nm of slit width and thicknesses of 120, 180, 260, 360, and 450 nm, we determine the reflectivities R = 0. 66, 0.99, 0.79, 0.98, and 0.91, and the resultant finesses F = 7.45, 312.58, 13.27, 155.49, and 33.29, respectively. Here it is important to point out that for an FP cavity, the definition of quality factor (Q factor) is equivalent to the finesse (Shyu et al, 2011). Therefore, we can clearly see that both the R and Q factor values are significantly affected by the film thickness for a fixed slit width.…”

Section: Resultsmentioning

confidence: 99%

Light Transmission via Subwavelength Apertures in Metallic Thin Films

Rivera¹,

Ferri²,

Silva³

et al. 2012

Plasmonics - Principles and Applications

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“…According to the proposed structure based on multi-beam interference, the laser beam passes through the optical cavity repeatedly, so the transmittance of the intensity loss from the cavity needs to be considered. In order to obtain the continuous change of the signal, the reflectance of the plane mirror is adjusted for further signal processing [30,31]. The theoretical formula of the interferometric light intensity is illustrated in Equation 2to Equation 5, where A 0 is the amplitude of the laser, R and T are the reflectance and transmittance of the plane mirror, L is the transmittance evaluated by the intensity loss in the optical cavity.…”

Section: Measurement Module For Linear Displacementmentioning

confidence: 99%

Linear Displacement Calibration System Integrated with a Novel Auto-Alignment Module for Optical Axes

Shih

Tung

Wang

et al. 2020

Sensors

Self Cite

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The quality of processed workpieces is affected directly by the precision of the linear stage. Therefore, the linear displacement calibration of machine tools must be implemented before delivery and after employment for a period of time. How to perform a precise calibration with high inspection efficiency is a critical issue in the precision mechanical engineering industry. In this study, the self-developed system integrated by the measurement module based on the common path Fabry–Pérot interferometer for linear displacement and the auto-alignment module for optical axes was proposed to realize the automatic linear displacement calibration of the linear stages. The measurement performance of the developed structure was verified experimentally. With the auto-alignment module, the cosine error was reduced to 0.36 nm and the entire procedure accomplished within 75 s without the limitation of the perceived resolution of the human eye, operational experience, and the risk of misalignment and broken cable. According to the comparison of experimental results for the linear displacement, the repeatability of the proposed measurement module was less than 0.171 μm. After the compensation procedure according to the linear displacement calibration, the systematic positional deviation, repeatability, and accuracy of the linear axis could be improved to 4 μm, 1 μm, and 5 μm respectively. Hence, the calibration efficiency can be improved by 80% with the proposed compact system, which is beneficial for the linear displacement calibration of machine tools in the precision mechanical engineering industry.

show abstract

Influence of intensity loss in the cavity of a folded Fabry-Perot interferometer on interferometric signals

Cited by 12 publications

References 7 publications

Influence of film thickness on the optical transmission through subwavelength single slits in metallic thin films

Influence of film thickness on the optical transmission through subwavelength single slits in metallic thin films

Light Transmission via Subwavelength Apertures in Metallic Thin Films

Linear Displacement Calibration System Integrated with a Novel Auto-Alignment Module for Optical Axes

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