There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

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Principles Of Optics Electromagnetic Theory Of Propagation Interference And Diffraction Of Light

This chapter introduces the finite element method (FEM) as a tool for solution of classical electromagnetic problems. Although we discuss the main points in the application of the finite element method to electromagnetic design, including formulation and implementation, those who seek deeper understanding of the finite element method should consult some of the works listed in the bibliography section.

Introduction to the Finite Element Method

We propose generation of 2.5 octave-spanning frequency combs in a suspended germanium-membrane ridge waveguide. The spectral range extends deep into the mid-infrared “fingerprint” region up to 12 μm, which cannot be realized using silicon-based waveguides.

Mid-infrared octave-spanning frequency comb generation in a suspended germanium-membrane ridge waveguide

In this article, a highly sensitive dual-core microstructured fiber (DC-MSF) sensor is proposed. Because of the adjustable dispersion characteristic of the DC-MSF, the group refractive index (RI) difference between the ${y}$ -polarization odd and even supermodes could achieve a zero value at the dispersion turning point (DTP), which makes the DC-MSF sensor have a high sensitivity. The simulation results show that the sensitivity can be up to 52 875 nm/RIU around the RI of 1.4, the operating bandwidth of sensitivity over 104 nm/RIU is 625 nm, and the operating bandwidth of sensitivity over 105 nm/RIU is 100 nm. Moreover, the DC-MSF can also be used as a temperature sensor by coating the polydimethylsiloxane (PDMS) on the surface, and the sensitivity can be up to 23.12 nm/°C around 22 °C. The detectable RI and temperature ranges of the proposed DC-MSF sensor are 1.375–1.425 and −15 °C–95 °C, respectively.

Highly Sensitive Dual-Core Microstructured Fiber Sensor Operating Near the Dispersion Turning Point

An ultra-short polarization beam splitter based on dual-core photonic crystal fiber with a nematic liquid crystal filled air hole is designed. The designed ultra-short PBS has a splitting length of 65 $\mu$m and the maximum extinction ratio of 101.72 dB. In addition, its bandwidth is about 364 nm, which covers the most O+E+S+C+L communication band.

An ultra-short polarization beam splitter based on dual-core photonic crystal fiber with a nematic liquid crystal filled air hole

To evaluate the light field display system with a liquid crystal display (LCD) and a holographic functional screen (HFS), the voxel theory based on the ray tracing is used. By analyzing the voxels defined by the cases of corresponding pixels overlapping completely and partially in the image space, the resolution characteristics of the system are discussed. The theoretical model is verified in the reconstruction experiment of a resolution target and compared with the calculation result of the presented system. Finally, we give an optimization method for the display image quality.

Stereo imaging quality evaluation in a full-color three-dimensional display system

We review recent research progress in the self-homodyne optical coherent system to address two key challenges in length mismatch induced phase noise and LO power fading induced by polarization rotation.

Jinhui Yuan

Papers

Mid-infrared octave-spanning frequency comb generation in a suspended germanium-membrane ridge waveguide

Highly Sensitive Dual-Core Microstructured Fiber Sensor Operating Near the Dispersion Turning Point

An ultra-short polarization beam splitter based on dual-core photonic crystal fiber with a nematic liquid crystal filled air hole

Stereo imaging quality evaluation in a full-color three-dimensional display system

Self-Homodyne Coherent Transmission for Datacenter Interconnections