Effect of measurement geometry on permeability extracted by a broadband method

Cho, S. G.; Kim, Jongrae; Kim, I.; Kim, K. H.; Yamaguchi, Masahiro

doi:10.1002/pssa.200777230

Cited by 2 publications

(1 citation statement)

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“…In case of resonators, the access to the sample such as optical illumination or application of external electric field is limited and it affects the performance of the resonator, e.g., a window on the wall of the resonator lowers the Q ‐factor. The broadband operation of CPWs makes frequency swept experiments such as permeability measurement [ 21 ] and ferromagnetic resonance studies [ 22 ] also very effective.…”

Section: Introductionmentioning

confidence: 99%

Optical–Microwave Pump–Probe Studies of Electronic Properties in Novel Materials

Kollarics

Bojtor

Koltai

et al. 2020

Physica Status Solidi (b)

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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.

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Section: Introductionmentioning

confidence: 99%