[17a-E502-1~13] 7.1 X-ray technologies

▲ [17a-E502-8] Optical Properties of Micro-Diamond using Hard X-ray nanoprobe

〇Ke ShangWei¹, Wu YuHao^1,2, Wang EnRuei¹, Chang ChaoHsun^1,3, Lee ChienYu¹, Chen BoYi¹, Yin GungChian¹, Tang MauTsu¹, Lin BiHsuan¹ (1.NSRRC, 2.NYC Univ, 3.NT Univ of Tech)

Keywords:X-ray Nanoprobe, XEOL, Nitrogen Vacancy

In recent years, diamond materials are the potential quantum optical materials, due to many kinds of defects and color centers existing in the wide bandgap diamond materials, such as nitrogen-vacancy (NV), Silicon vacancy (SiV), and boron vacancy (BV)……etc. However, there were few reports studying the interaction between diamond materials and hard X-ray source. Therefore, we utilized the multifunctional hard X-ray nanoprobe of the Taiwan photo source (TPS) 23A to study the emission properties of the micro-diamond. The optical properties can be detailed studied by using X-ray excited optical luminescence (XEOL) and XEOL mapping. The emission distribution of the micro-diamond with an emission wavelength at 665 nm is shown in Fig. 1(a). We found that the emission intensity will aggregate in the edge of the micro-diamond. Furthermore, we can focus on the local area of P1 to obtain the XEOL spectrum shown in Fig. 1(b). The NV⁰ zero phonon line at 575nm and the wide photon sideband of the micro-diamond can be observed clearly. In addition, based on the advantage of tunable energy using a synchrotron source, the XEOL spectra at different energy from 5 keV to 13.5 keV are also measured. It shows that the highest emission intensity of the micro-diamond can be obtained by using X-ray energy at 5 keV. In summary, X-ray nanoprobe can perform the spatial resolution to study the emission distribution of the micro-diamond. It is anticipated that the X-ray nanoprobe will open new avenues with great characterization ability for diamond-related materials.