Guided-Mode Resonance Filter for Three Primary Color Tuned by Incident Angle

This paper reports on the measurement system of the phase difference between s- and p-polarization components of the light passing through a guided-mode resonance (GMR) device using a digital micromirror device (DMD) gratings as a digital phase-shifting device. The phase of the non-zeroth order diffraction beams of the grating pattern displayed on the DMD can exhibit a phase change when the grating pattern is shifted. Two nearest different diffraction orders of p-polarized and s-polarized beams can be used as the reference and measurement beams, respectively, and are combined to implement the phase-shifting interferometry (PSI). The phase difference between the s- and the p-polarization components of the incident light passing through the GMR device can be obtained by applying the four-step phase-shift algorithm to the DMD-based PSI system. Experimental results show that this measurement system has a phase detection limit of 1° and was able to obtain the abrupt phase difference curve of the GMR device versus the incident angle.

Download Full-text

Enhanced light trapping in Ge-on-Si-on-insulator photodetector by guided mode resonance effect

Journal of Applied Physics ◽

10.1063/1.5031453 ◽

2018 ◽

Vol 124 (5) ◽

pp. 053101

Author(s):

Zhi Liu ◽

Jietao Liu ◽

Buwen Cheng ◽

Jun Zheng ◽

Chuanbo Li ◽

...

Keyword(s):

Light Trapping ◽

Resonance Effect ◽

Guided Mode ◽

Guided Mode Resonance

Download Full-text

A Compact Detection Platform Based on Gradient Guided-Mode Resonance for Colorimetric and Fluorescence Liquid Assay Detection

Sensors ◽

10.3390/s21082797 ◽

2021 ◽

Vol 21 (8) ◽

pp. 2797

Author(s):

Jing-Jhong Gao ◽

Ching-Wei Chiu ◽

Kuo-Hsing Wen ◽

Cheng-Sheng Huang

Keyword(s):

Limit Of Detection ◽

Detection System ◽

Fluorescence Emission ◽

Assay Sensitivity ◽

Detection Range ◽

Current Form ◽

Guided Mode ◽

Spectral Detection ◽

Guided Mode Resonance ◽

Colorimetric Assays

This paper presents a compact spectral detection system for common fluorescent and colorimetric assays. This system includes a gradient grating period guided-mode resonance (GGP-GMR) filter and charge-coupled device. In its current form, the GGP-GMR filter, which has a size of less than 2.5 mm, can achieve a spectral detection range of 500–700 nm. Through the direct measurement of the fluorescence emission, the proposed system was demonstrated to detect both the peak wavelength and its corresponding intensity. One fluorescent assay (albumin) and two colorimetric assays (albumin and creatinine) were performed to demonstrate the practical application of the proposed system for quantifying common liquid assays. The results of our system exhibited suitable agreement with those of a commercial spectrometer in terms of the assay sensitivity and limit of detection (LOD). With the proposed system, the fluorescent albumin, colorimetric albumin, and colorimetric creatinine assays achieved LODs of 40.99 and 398 and 25.49 mg/L, respectively. For a wide selection of biomolecules in point-of-care applications, the spectral detection range achieved by the GGP-GMR filter can be further extended and the simple and compact optical path configuration can be integrated with a lab-on-a-chip system.

Download Full-text

Topological guided-mode resonances at non-Hermitian nanophotonic interfaces

Nanophotonics ◽

10.1515/nanoph-2021-0024 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Ki Young Lee ◽

Kwang Wook Yoo ◽

Youngsun Choi ◽

Gunpyo Kim ◽

Sangmo Cheon ◽

...

Keyword(s):

Fundamental Study ◽

One Dimensional ◽

Guided Mode ◽

Wall Structures ◽

Potential Applications ◽

Photonic Microstructures ◽

Guided Mode Resonance ◽

The One ◽

Photonic Band ◽

Topological Correlations

Abstract The topological properties of photonic microstructures are of great interest because of their experimental feasibility for fundamental study and potential applications. Here, we show that robust guided-mode-resonance states exist in photonic domain-wall structures whenever the complex photonic band structures involve certain topological correlations in general. Using the non-Hermitian photonic analogy of the one-dimensional Dirac equation, we derive essential conditions for photonic Jackiw-Rebbi-state resonances taking advantage of unique spatial confinement and spot-like spectral features which are remarkably robust against random parametric errors. Therefore, the proposed resonance configuration potentially provides a powerful method to create compact and stable photonic resonators for various applications in practice.

Download Full-text