基于InP折射率变化的辐射图像探测技术原理验证

涂艳云; 马继明; 宋岩; 张健; 徐青; 孙铁平; 彭博栋; 韩长材; 李阳; 郭泉; 张骞; 高可庆; 李郎郎; 刘振

doi:10.11884/HPLPB202537.250230

基于InP折射率变化的辐射图像探测技术原理验证

doi: 10.11884/HPLPB202537.250230

涂艳云^1,,
马继明^1, ,,
宋岩¹,
张健²,
徐青¹,
孙铁平¹,
彭博栋¹,
韩长材¹,
李阳¹,
郭泉¹,
张骞¹,
高可庆¹,
李郎郎¹,
刘振¹

1.
强脉冲辐射环境模拟与效应全国重点实验室，西北核技术研究所，西安 710024
2.
国防科技大学，长沙 410073

基金项目: 国防科技卓越青年科学基金项目（JQZQ021902）

详细信息

作者简介:
涂艳云，tuyanyun@nint.ac.cn

通讯作者:
马继明，majiming@nint.ac.cn。

中图分类号: TL81
计量
- 文章访问数: 55
- HTML全文浏览量: 11
- PDF下载量: 6
- 被引次数: 0
出版历程
- 收稿日期: 2025-07-20
- 修回日期: 2025-09-21
- 录用日期: 2025-09-21
- 网络出版日期: 2025-09-25
- 刊出日期: 2025-10-15

Proof-of-principle of radiation detecting technology based on InP refractive index changes

1.
National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi’an 710024, China
2.
National University of Defense Technology, Changsha 410073, China

摘要

摘要: 为了验证基于磷化铟（InP）晶体折射率变化的辐射图像探测技术对脉冲射线探测的有效性，开展了原理验证实验。搭建了基于迈克尔逊干涉仪的辐射图像探测系统，采用350 μm厚的掺铁InP晶体作为辐射转换晶体。利用该系统成功获取了该晶体在532 nm激光脉冲激发下的干涉条纹变化图像。基于泵浦-探测技术测得掺铁InP晶体在532 nm泵浦激光下的时间响应为1.5 ns。通过在泵浦激光光路中放置分辨率板测量空间分辨率，重构结果表明，系统的空间分辨率可达1 lp/mm。实验结果表明，基于InP折射率变化的超快图像探测技术初步验证可行，该系统有望用于发展具有高时间与高空间分辨能力的脉冲射线探测技术。
- 掺铁InP晶体 /
- 迈克尔逊干涉 /
- 辐射探测技术 /
- 泵浦-探测
Abstract: Background
With the continuous development of national strategic needs, multiple large-scale radiation simulation facilities have been constructed, imposing increasingly stringent requirements on the temporal and spatial resolution of radiation detection. Researchers have been actively developing novel techniques to achieve higher resolution. Against this background, the technique utilizing the transient refractive index response of semiconductor crystals for radiation detection has gained significant attention.
Purpose
This study presents a novel approach based on refractive index changes in indium phosphide (InP) crystals to enhance the temporal and spatial resolution of radiation detection. A proof-of-principle experiment was conducted to validate the effectiveness of the proposed technique for pulsed radiation detection.
Methods
A radiation imaging system was constructed based on a Michelson interferometer configuration. This system used a 350 μm thick iron-doped InP crystal as the radiation sensor.
Results
Using this setup, images of refractive index changes within the crystal induced by laser pulse excitation with a wavelength of 532 nm were successfully captured. Pump-probe measurements revealed that the iron-doped InP crystal exhibited a time response of 1.5 ns under pump laser irradiation. Spatial resolution was characterized by placing a resolution target in the pump beam path; image reconstruction achieved a system spatial resolution of 1 lp/mm.
Conclusions
These experimental results demonstrate the feasibility of the ultrafast image detection technology based on InP refractive index changes. This system has the potential to significantly advance pulsed radiation beam detection technology, offering high temporal and spatial resolution capabilities.
- iron-doped InP crystal /
- Michelson interferometer /
- radiation detecting technology /
- pump-probe

HTML全文

图 1 激光脉冲波形和实验系统示意图

Figure 1. Waveform of laser pulse and schematic of the experimental system

下载: 全尺寸图片幻灯片

图 2 无泵浦激光激发和有泵浦激光激发的干涉条纹图

Figure 2. Comparison of interferograms without and with pump laser excitation

下载: 全尺寸图片幻灯片

图 3 无泵浦激发和有泵浦激发下的干涉条纹图、分辨率卡和重建图

Figure 3. Comparison of interferograms without and with pump excitation, resolution target, and reconstructed image

下载: 全尺寸图片幻灯片

图 4 不同泵浦探测延时时间下的干涉条纹图

Figure 4. Interferograms at different pump-probe delay times

下载: 全尺寸图片幻灯片

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