Anisotropy of DNA molecule detection and enhancement by GaN-based electronic sensor

An electrical characterization approach with a newly, to the best of our knowledge, defined electrical anisotropy (η) was proposed to characterize and enhance the anisotropy signals of DNA molecules. This approach utilizes L-shaped aluminum gratings on a gallium nitride PiN electronic sensor system to adjust and improve the η signals. Using this approach, the η signals of DNA molecules can be adjusted more easily and efficiently by changing the electrical parameters of the sensor. For instance, the η modes of DNA were enhanced more than 22 times with the change of the incident power and the reverse bias voltage of the PiN structure.