Enhanced photoelectric detection of NV magnetic resonances in diamond under dual-beam excitation
| Autor: | Milos Nesladek, Georg Wachter, Michael Trupke, Elisa Londero, K. Dobes, Jaroslav Hruby, Adam Gali, Michal Gulka, Friedrich Aumayr, Emilie Bourgeois, Jan Stursa, Kathrin Buczak, Yaso Balasubramaniam |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Spins Diamond 02 engineering and technology Photoionization Photoelectric effect engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Qubit Ionization 0103 physical sciences engineering Atomic physics 010306 general physics 0210 nano-technology Spin (physics) Excitation |
| Popis: | The core issue for the implementation of NV center qubit technology is a sensitive readout of the NV spin state. We present here a detailed theoretical and experimental study of NV center photoionization processes, used as a basis for the design of a dual-beam photoelectric method for the detection of NV magnetic resonances (PDMR). This scheme, based on NV one-photon ionization, is significantly more efficient than the previously reported single-beam excitation scheme. We demonstrate this technique on small ensembles of similar to 10 shallow NVs implanted in electronic grade diamond (a relevant material for quantum technology), on which we achieve a cw magnetic resonance contrast of 9%-three times enhanced compared to previous work. The dual-beam PDMR scheme allows independent control of the photoionization rate and spin magnetic resonance contrast. Under a similar excitation, we obtain a significantly higher photocurrent, and thus an improved signal-to-noise ratio, compared to single-beam PDMR. Finally, this scheme is predicted to enhance magnetic resonance contrast in the case of samples with a high proportion of substitutional nitrogen defects, and could therefore enable the photoelectric readout of single NV spins. Support from EU (FP7 Project DIADEMS, Grant No. 611143) is acknowledged. A.G. acknowledges the Lendulet program of the Hungarian Academy of Sciences. The authors thank A. Jarmola and D. Budker from the Department of Physics of the University of California (Berkeley, California) for the preparation of the electron-irradiated type-Ib diamond. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|