Comparative research for GaAs photocathodes with graded compositional Al x Ga 1−x As buffer layer

Chen, Liang; Shen, Yonghang; Zhang, Shuqin; Qian, Yunsheng; Xu, Sunan

doi:10.1016/j.optcom.2014.10.004

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…The GaAs photocathode is effective in the visible and near- IR ranges. Significant variations in responsivity, however, may be expected depending on the GaAs fabrication process [9,10]. The actual response of the photocathode (Fig.…”

Section: New Nvg Gain Definition and Input And Output Quantities Umentioning

confidence: 99%

Calibration of night vision goggles: an SI-units-based gain measurement technique

2017

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A gain measurement technique for the calibration of night vision goggles (NVG) is proposed and evaluated. This technique is based on the radiance measurements at the input and output of the NVG. In contrast to the old definition, which uses a non-International System of Units (SI) traceable luminance, the “equivalent luminance unit,” the suggested technique utilizes the radiance quantities that are traceable to the SI units through National Institute of Standards and Technology (NIST) standards. Due to the implementation of the scaling coefficients originating from the NVG spectral responsivities, the same NVG gain is expected within both techniques. The suggested method was evaluated at the NIST night vision calibration facility and the experimental data were compared to the results obtained with a commercial NVG test set. The comparison of the radiometric quantities obtained using the two different methods indicated differences up to 15% due to different calibration conditions. However, at proper calibration, equal NVG gains within both the suggested and old gain definitions were measured for the goggles equipped with a filmless image tube. The NVG gain uncertainty analysis, including the effect of no-moon night sky radiation, was performed for goggle types A, B, and C.

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Section: New Nvg Gain Definition and Input And Output Quantities Umentioning

confidence: 99%

Calibration of night vision goggles: an SI-units-based gain measurement technique

2017

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The effective light‐harvesting performance of graded compositional Al _x Ga _1−x N nano‐cone arrays photocathode for ultraviolet detector—A numerical investigation and simulation

Liu

Zhangyang

et al. 2020

Int J Energy Res

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A graded compositional Al x Ga 1−x N nanomaterial with a built-in electric field has been proposed to improve the quantum efficiency of the negative electronic affinity photocathode. When the graded compositional Al x Ga 1−x N nano-cone array is applied to the ultraviolet (UV) detector, it is necessary to improve the effective light absorption, which is high absorption in the UV short-wavelength and high sensitivity in the threshold wavelength. Therefore, the light absorption of nano-cone arrays with different feature sizes and geometrical properties is accurately calculated innovatively based on the finite-difference time-domain method. Studies show that a non-close-packed six-sided pyramid structure with a fill factor of 42.44% and a height of 1000 nm has an absorption spectrum that better satisfies the response characteristics of the UV detector. Surface reflection depends to a large extent on the transformation of the angle of incidence. The optical absorption properties of the graded compositional Al x Ga 1−x N nano-cone array provide flexibility and reference value for the improvement of the absorption coefficient and other parameters in the actual quantum efficiency experiment of the UV photocathode with built-in electric field, which can realize the highest sensitivity of various designed UV detector optical system.

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P-type doped AlxGa1-xAs nanowire photocathode: A theoretical perspective on structural and optoelectronic properties

Diao,

Xia

2024

Micro and Nanostructures

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Comparative research for GaAs photocathodes with graded compositional Al x Ga 1−x As buffer layer

Cited by 3 publications

References 21 publications

Calibration of night vision goggles: an SI-units-based gain measurement technique

Calibration of night vision goggles: an SI-units-based gain measurement technique

The effective light‐harvesting performance of graded compositional Al _x Ga _1−x N nano‐cone arrays photocathode for ultraviolet detector—A numerical investigation and simulation

P-type doped AlxGa1-xAs nanowire photocathode: A theoretical perspective on structural and optoelectronic properties

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Comparative research for GaAs photocathodes with graded compositional Al x Ga 1−x As buffer layer

Cited by 3 publications

References 21 publications

Calibration of night vision goggles: an SI-units-based gain measurement technique

Calibration of night vision goggles: an SI-units-based gain measurement technique

The effective light‐harvesting performance of graded compositional Al x Ga 1−x N nano‐cone arrays photocathode for ultraviolet detector—A numerical investigation and simulation

P-type doped AlxGa1-xAs nanowire photocathode: A theoretical perspective on structural and optoelectronic properties

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The effective light‐harvesting performance of graded compositional Al _x Ga _1−x N nano‐cone arrays photocathode for ultraviolet detector—A numerical investigation and simulation