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Optical–Microwave Pump–Probe Studies of Electronic Properties in Novel Materials
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.6 ) Pub Date : 2020-10-09 , DOI: 10.1002/pssb.202000298
Sándor Kollarics 1, 2 , András Bojtor 1 , Kristóf Koltai 1 , Bence Gábor Márkus 1, 2 , Károly Holczer 3 , János Volk 4 , Gergely Klujber 5 , Máté Szieberth 5 , Ferenc Simon 1, 2
Affiliation  

Combined microwave–optical pump–probe methods are emerging to study the quantum state of spin qubit centers and the charge dynamics in semiconductors. A major hindrance is the limited bandwidth of microwave irradiation/detection circuitry which can be overcome with the use of broadband coplanar waveguides (CPWs). The development and performance characterization of two spectrometers is presented as follows: an optically detected magnetic resonance spectrometer (ODMR) and a microwave‐detected photoconductivity measurement. In the first method, light serves as detection and microwaves excite the investigated medium, whereas in the second, the roles are interchanged. The performance is demonstrated by measuring ODMR maps on the nitrogen‐vacancy (NV) center in diamond and time‐resolved photoconductivity in p‐doped silicon. The results demonstrate both an efficient coupling of the microwave irradiation to the samples as well as an excellent sensitivity for minute changes in sample conductivity.

中文翻译:

光学-微波泵浦-新型材料电子特性的探针研究

结合微波-光泵-探针方法的研究正在兴起,以研究自旋量子位中心的量子态和半导体中的电荷动力学。一个主要的障碍是微波辐射/检测电路的有限带宽,可以通过使用宽带共面波导(CPW)来克服。两种光谱仪的开发和性能表征如下:光学检测磁共振光谱仪(ODMR)和微波检测光电导率测量。在第一种方法中,光用作检测,微波激发被研究的介质,而在第二种方法中,角色互换。通过测量金刚石中氮空位(NV)中心的ODMR图和p中时间分辨的光电导率可证明其性能掺杂硅。结果表明,微波辐射与样品的有效耦合以及对样品电导率微小变化的出色灵敏度。
更新日期:2020-12-14
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