Polarization-sensitive terahertz reflective multi-channel beam separation by cascaded configuration

Lin, Zefan; Wang, Bo; Xing, Xiangjun; Zhang, Fangteng; Xue, Jiancai; Zhou, Jinyun

doi:10.1016/j.rinp.2021.104702

Cited by 5 publications

(2 citation statements)

References 40 publications

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“…In recent years, many researchers have studied the multi-port output beam splitter. Based on the situation of the output light, multi-port grating beam splitter can be divided into reflective grating beam splitter and transmissive grating beam splitter [19][20][21][22][23][24]. Usually, the beam splitter with silver layer structure is reflective grating beam splitter and the light will be reflected back by the silver layer.…”

Section: Introductionmentioning

confidence: 99%

Plus-shaped dielectric grating for seven-channel transmission

Zhou,

Wang

2023

Phys. Scr.

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A new seven-channel transmission grating with plus-shaped array under normal incidence is proposed and discussed in this paper. Through the simulated annealing (SA) algorithm and rigorous coupled-wave analysis (RCWA), the novel microstructure can split the incident energy into 0-th/±1-st/±2-nd/±3-rd orders evenly. The influence of incident angle, period, incident wavelength, and other parameters on the diffraction efficiency are also analyzed in this paper. For transverse magnetic (TM) polarization, the range of period is 3062-3246 nm and the bandwidth of incident angle and wavelength is 1.96° and 32.3 nm, respectively. It can be concluded that the TM-polarized light of the designed grating has a good performance in incident bandwidth and fabrication tolerance. In addition, the efficiency of transverse electric (TE) polarization has the satisfactory uniformity of 2.40%. Therefore, the proposed grating has a certain significance for the research of multi-port beam splitter, especially for the seven-channel polarization-independent beam splitter.

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Section: Introductionmentioning

confidence: 99%

Plus-shaped dielectric grating for seven-channel transmission

Zhou,

Wang

2023

Phys. Scr.

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“…Over the past few years, in the production and application field, multi-channel reflective beam splitters have gained significant attention from researchers due to the advancements in ultra-precision optical devices [23][24][25][26][27][28]. Lin et al developed a polarization-sensitive terahertz reflective multi-channel beam splitter [29]. The splitter utilizes resonance-domain diffraction gratings with periods similar to the incident wavelength, enabling effective multichannel beam separation.…”

Section: Introductionmentioning

confidence: 99%

Efficient infrared nine-channel reflective polarization-dependent splitter

Liang,

Wang,

2023

Phys. Scr.

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In order to meet the requirements of a multi-beam splitter in optical communication systems, an efficient infrared nine-channel reflective polarization-dependent beam splitter based on an addition-shaped ridge structure is proposed. All structural parameters of this polarization-dependent beam splitter are derived from the rigorous coupled-wave analysis. Upon the vertical entry of a plane wave with a wavelength of 800 nm into the grating, for transverse magnetic polarization, the diffraction efficiencies are 10.66%, 10.69%, 10.69%, 10.65%, and 10.67% at 0th, ±1st, ±2nd, ±3rd and ±4th orders, respectively. For transverse electric polarization, the diffraction efficiencies of the 0th, ±1st, ±2nd, ±3rd and ±4th orders are 10.79%, 10.86%, 10.88%, 10.84%, and 10.86%, respectively. In addition, the tolerance analysis in this paper reveals the practicality and efficiency of this beam splitter. Therefore, the addition-shaped ridge structure has a good performance of uniformity and broad application prospects in nine-channel reflective applications.

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