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Related Concept Videos

Non-ohmic Devices00:51

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In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
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Related Experiment Video

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Fabrication of Silica Ultra High Quality Factor Microresonators
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Published on: July 2, 2012

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Monolithic temperature-insensitive high-Q Ta2O5 microdisk resonator.

Zhen Yang1,2, Zheng Zhang1, Peng Cheng1

  • 1Laboratory of Infrared Materia and Devices, Advanced Technology Research Institute, Ningbo University, Ningbo, Zhejiang, 315211, China.

Nanophotonics (Berlin, Germany)
|December 22, 2025
PubMed
Summary
This summary is machine-generated.

We developed a temperature-insensitive tantalum oxide (Ta2O5) microdisk resonator. This device achieves a high Q-factor and stable performance, making it ideal for integrated photonics and precision sensing applications.

Keywords:
microdisk resonatoroptical cavitytantala waveguide

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Area of Science:

  • Photonics and optical engineering
  • Materials science for optical devices
  • Integrated optics

Background:

  • High-Q microdisk resonators are crucial for integrated photonic circuits.
  • Tantalum oxide (Ta2O5) offers potential for optical applications due to its material properties.
  • Achieving temperature stability in resonators is a significant challenge for practical applications.

Purpose of the Study:

  • To demonstrate a high-Q tantalum oxide (Ta2O5) microdisk resonator.
  • To investigate the temperature insensitivity and optical stability of these resonators.
  • To evaluate the potential of Ta2O5 microdisk resonators for integrated photonic devices.

Main Methods:

  • Fabrication of Ta2O5 microdisk resonators using electron-beam lithography and inductively coupled plasma reactive-ion etching.
  • Characterization of optical properties, including Q-factor and resonant wavelength.
  • Thermal annealing at 600°C to improve resonator performance.
  • Testing of temperature-dependent resonant wavelength shift and optical stability under elevated input power.

Main Results:

  • Achieved a loaded Q-factor of 4.25 × 105 at 1,550 nm, increasing to ~9.3 × 105 after annealing.
  • Demonstrated remarkable temperature insensitivity with a suppressed resonant wavelength shift (<10 pm/°C) over a 100 nm bandwidth.
  • Maintained high optical stability, with no degradation in Q-factor or extinction ratio under elevated input power.

Conclusions:

  • The fabricated Ta2O5 microdisk resonators exhibit high Q-factors and exceptional thermal stability.
  • These resonators are a promising platform for advanced integrated photonic applications.
  • Potential applications include on-chip narrow-linewidth lasers and high-precision sensing devices.