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Voltage Dividers01:14

Voltage Dividers

890
In electrical circuits, resistors can be connected in series, sequentially linked one after the other. In a series configuration, the same current flows through each resistor. Ohm's law is a fundamental principle to understand the behavior of resistors in series. It expresses the voltage across these resistors in terms of the current and resistance.
Kirchhoff's voltage law implies that the sum of the voltages across the resistors in series equals the source voltage. This means that the...
890

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Non-Volatile Programmable Ultra-Small Photonic Arbitrary Power Splitters.

Huan Yuan1,2, Jiagui Wu3, Jinping Zhang1,2

  • 1Center of Material Science, National University of Defense Technology, Changsha 410073, China.

Nanomaterials (Basel, Switzerland)
|February 26, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed compact, reconfigurable photonic power splitters using silicon and a novel phase change material (GSST). These devices offer digital control and a small footprint, enabling advanced optoelectronic fusion chips.

Keywords:
arbitrary power splitterdigital nanophotonicsinverse designphase change material

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Area of Science:

  • Photonics and Materials Science
  • Optoelectronics
  • Integrated Optics

Background:

  • Optical phase change materials (O-PCMs) offer unique properties for photonic devices.
  • Achieving compact and reconfigurable photonic integrated circuits (PICs) is crucial for advanced applications.
  • Non-volatile optical switching with low absorption is highly desirable.

Purpose of the Study:

  • To propose and analyze reconfigurable compact photonic arbitrary power splitters.
  • To leverage the properties of germanium-antimony-selenium-tellurium (GSST) as an O-PCM.
  • To demonstrate digital reconfigurability and a small footprint for photonic integrated circuits.

Main Methods:

  • Utilizing a hybrid silicon and GSST meta-hybrid structure.
  • Employing digital reconfiguration through amorphous and crystalline switching of GSST.
  • Analyzing device performance using three-dimensional finite-difference time-domain (3D-FDTD) simulations.
  • Investigating 1x2, 1x3, and 1x4 splitting configurations in the C-band (1530-1560 nm).

Main Results:

  • Achieved arbitrarily reconfigurable power-split ratios with high precision.
  • Demonstrated extremely small PIC footprints comparable to advanced electronic integrated circuits (EICs).
  • GSST material coated less than one-fifth of the pattern area, enabling efficient design.
  • Provided true value tables for GSST distribution for various splitting configurations.

Conclusions:

  • The proposed non-volatile hybrid photonic splitters offer significant advantages in terms of footprint and digital programmability.
  • These devices are highly favorable for the development of truly optoelectronic fusion chips.
  • The digital, non-volatile nature of GSST switching enables versatile photonic circuit designs.