The enhanced power of the new measuring technique to characterize ラーメンベット 入金ボーナス at scales much smaller than any current technologies will accelerate the discovery and investigation of 2D, micro- and nanoscale ラーメンベット 入金ボーナス.
Being able to accurately measure semiconductor properties of ラーメンベット 入金ボーナス in small volumes helps engineers determine the range of applications for which these ラーメンベット 入金ボーナス may be suitable in the future, particularly as the size of electronic and optical devices continues to shrink.
Daniel Wasserman, an associate professor in the Department of Electrical and Computer ラーメンベット 入金ボーナス in the ラーメンベット 禁止ゲーム of ラーメンベット 入金ボーナス, led the team that built the physical system, developed the measurement technique capable of achieving this level of sensitivity and successfully demonstrated its improved performance. Their work was reportedtoday inNature Communications.
The team’s design approach was focused on developing the capability to provide quantitative feedback on material quality, with particular applications for the development and manufacturing of optoelectronic devices. The method demonstrated is capable of measuring many of the ラーメンベット 入金ボーナス that engineers believe will one day be ubiquitous to next-generation optoelectronic devices.
Optoelectronics is the study and application of electronic devices that can source, detect and control light. Optoelectronic devices that detect light, known as photodetectors, use ラーメンベット 入金ボーナス that generate electrical signals from light.Photodetectors are found in smartphone cameras, solar cells and in the fiber optic communication systems that make up our broadband networks. In an optoelectronic material, the amount of time that the electrons remain “photoexcited,” or capable of producing an electrical signal, is a reliable indicator of the potential quality of that material for photodetection applications.
Rendering of microwave resonator showing the (blue) microwave signal’s size change resulting from a light pulse (red) once the pulse hits the infrared pixel (micrograph image of pixel is shown ラーメンベット 入金ボーナス inset).
The current method used for measuring the carrier dynamics, or lifetimes, of photoexcited electrons is costly and complex and only measures large-scale material samples with limited accuracy. The UT team decided to try using a different method for quantifying these lifetimes by placing small volumes of the ラーメンベット 入金ボーナス in specially designed microwave resonator circuits. Samples are exposed to concentrated microwave fields while inside the resonator. When the sample is hit with light, the microwave circuit signal changes, and the change in the circuit can be read out on a standard oscilloscope. The decay of the microwave signal indicates the lifetimes of photoexcited charge carriers in small volumes of the material placed in the circuit.
“Measuring the decay of the electrical (microwave) signal allows us to measure the ラーメンベット 入金ボーナス’ carrier lifetime with far greater accuracy,” Wasserman said. “We have discovered it to be a simpler, cheaper and more effective method than current approaches.”
Carrier lifetime is a critical material parameter that provides insight into the overall optical quality of a material while also determining the range of applications for which a material could be used when it's integrated into a photodetector device structure. For example, ラーメンベット 入金ボーナス that have a very long carrier lifetime may be of high optical quality and therefore very sensitive, but may not be useful for applications that require high-speed.
“Despite the importance of carrier lifetime, there are not many, if any, contact-free options for characterizing small-area ラーメンベット 入金ボーナス such as infrared pixels or 2D ラーメンベット 入金ボーナス, which have gained popularity and technological importance in recent years,” Wasserman said.
One area certain to benefit from the real-world applications of this technology is infrared detection, a vital component in molecular sensing, thermal imaging and certain defense and security systems.
“A better understanding of infrared ラーメンベット 入金ボーナス could lead to innovations in night-vision goggles or infrared spectroscopy and sensing systems,” Wasserman said.
High-speed detectors operating at these frequencies could even enable the development of free-space communication ラーメンベット 入金ボーナス long wavelength infrared – a technology allowing for wireless communication in difficult conditions, in space or between buildings in urban environments.
The ラーメンベット 入金ボーナス was funded by Air Force ラーメンベット 入金ボーナス Laboratories and is part of an ongoing collaboration between Wasserman and his Mid-IR Photonics Group at UT, close collaborators at Eglin Air Force Base and researchers from The Ohio State University, University of Wisconsin and Sandia National Laboratories.
