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Robustness of antenna-coupled distributed bolometers.
Optics Letters
|October 2, 2013
Summary
Biasing voltage limits the performance of optical antennas used as bolometers. Exceeding this voltage, regardless of light intensity, causes device failure and structural damage, confirmed by experiments.
Area of Science:
- Optoelectronics
- Materials Science
- Sensor Technology
Background:
- Optical antennas are crucial for sensing applications, often functioning as distributed bolometers.
- Understanding the factors affecting their robustness and reliability is essential for practical deployment.
- Lead lines and connections play a significant role in device performance.
Purpose of the Study:
- To investigate the impact of geometrical and material properties on optical antenna reliability.
- To determine the operational limits of biasing voltage for optical antennas.
- To identify the primary limiting factor for the operability of titanium optical antennas.
Main Methods:
- Utilized a multiphysics finite element method to analyze operational limits.
- Evaluated the effect of electromagnetic irradiance on device performance.
- Experimentally verified results by determining the biasing voltage threshold for device destruction.
Main Results:
- Biasing voltage was identified as the main limiting factor for operative titanium optical antennas, surpassing the influence of electromagnetic irradiance.
- Experimental verification confirmed the calculated biasing voltage values required to induce failure.
- Scanning electron microscopy revealed structural damage in destroyed optical antennas.
Conclusions:
- The biasing voltage is a critical parameter that dictates the operational limits and reliability of optical antennas functioning as distributed bolometers.
- Material and geometrical properties of lead lines and connections influence device robustness.
- Experimental validation confirms the theoretical findings regarding device failure mechanisms.
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