| Records |
| Author |
Sych, Denis; Shcherbatenko, Michael; Elezov, Michael; Goltsman, Gregory N. |
| Title |
Towards the improvement of the heterodyne receiver sensitivity beyond the quantum noise limit |
Type |
Conference Article |
| Year |
2018 |
Publication  |
Proc. 29th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 29th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
245-247 |
| Keywords |
standard quantum limit, sub-SQL quantum receiver, Kennedy receiver, SSPD, SNSPD |
| Abstract |
Noise reduction in heterodyne receivers of the terahertz range is an important issue for astronomical applications. Quantum fluctuations, also known as shot noise, prohibit errorless measurements of the amplitude of electro-magnetic waves, and introduce the so-called standard quantum limit (SQL) on the minimum error of the heterodyne measurements. Nowadays, the sensitivity of modern heterodyne receivers approaches the SQL, and the growing demand for the improvement of measurement precision stimulates a number of both theoretical and experimental efforts to design novel measurement techniques aimed at overcoming the SQL. Here we demonstrate the first steps towards the practical implementation of a sub-SQL quantum receiver. As the principal resources, it requires a highly efficient single-photon counting detector and an interferometer-based scheme for mixing the signal with a low-power local oscillator. We describe the idea of such receiver and its main components. |
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1314 |
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| Author |
Kuzin, Aleksei; Elmanov, Ilia; Kovalyuk, Vadim; An, Pavel; Goltsman, Gregory |
| Title |
Silicon nitride focusing grating coupler for input and output light of NV-centers |
Type |
Conference Article |
| Year |
2020 |
Publication |
Proc. 32-nd EMSS |
Abbreviated Journal |
Proc. 32-nd EMSS |
| Volume |
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Issue |
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Pages |
349-353 |
| Keywords |
NV-centers, focusing grating coupler |
| Abstract |
Here we presented the numerical results for the calculation of focusing grating coupler efficiency in the visible wavelength range. Using the finite element method, the optimal geometric parameters, including filling factor and grating period for a central wavelength of 637 nm, were found. Obtained results allow to input/output single-photon radiation from NV-centers, and can be used for research and development of a scalable on-chip quantum optical computing. |
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2724-0029 |
ISBN |
978-88-85741-44-7 |
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32nd European Modeling & Simulation Symposium |
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1841 |
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| Author |
Elmanov, Ilia; Elmanova, Anna; Kovalyuk, Vadim; An, Pavel; Goltsman, Gregory |
| Title |
Integrated contra-directional coupler for NV-centers photon filtering |
Type |
Conference Article |
| Year |
2020 |
Publication |
Proc. 32-nd EMSS |
Abbreviated Journal |
Proc. 32-nd EMSS |
| Volume |
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Issue |
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Pages |
354-360 |
| Keywords |
NV-centers, nanodiamonds, quantum photonic integrated circuits, contra-direction coupler, Bragg gratings |
| Abstract |
We modelled an integrated optical contra-directional coupler on silicon nitride platform. Performance of the filter was studied depending on different parameters, including the grating period and the height of teeth of the Bragg grating near 637 nm operation wavelength. The obtained results can be used for a design and fabrication of quantum photonic integrated circuits with on-chip single-photon NV-centers in nanodiamonds. |
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2724-0029 |
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978-88-85741-44-7 |
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32nd European Modeling & Simulation Symposium |
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1839 |
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Elmanov, Ilia; Elmanova, Anna; Kovalyuk, Vadim; An, Pavel; Goltsman, Gregory |
| Title |
Silicon nitride photonic crystal cavity coupled with NV-centers in nanodiamonds |
Type |
Conference Article |
| Year |
2020 |
Publication |
Proc. 32-nd EMSS |
Abbreviated Journal |
Proc. 32-nd EMSS |
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344-348 |
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The development of integrated quantum photonics requires a high efficient excitation and coupling of a single photon source with on-chip devices. In this paper, we show our results of modelling for high-Q photonic crystal cavity, optimized for zero phonon line emission of NV-centers in nanodiamonds. Modelling was performed for the silicon nitride platform and obtained a quality factor equals to 6136 at 637 nm wavelength. |
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NV-centers, nanodiamonds |
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2724-0029 |
ISBN |
978-88-85741-44-7 |
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Conference |
32nd European Modeling & Simulation Symposium |
| Notes |
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no |
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Serial |
1840 |
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| Author |
Goltsman, Gregory N.; Vachtomin, Yuriy B.; Antipov, Sergey V.; Finkel, Matvey I.; Maslennikov, Sergey N.; Polyakov, Stanislav L.; Svechnikov, Sergey I.; Kaurova, Natalia S.; Grishina, Elisaveta V.; Voronov, Boris M. |
| Title |
Low-noise NbN phonon-cooled hot-electron bolometer mixers for terahertz heterodyne receivers |
Type |
Conference Article |
| Year |
2005 |
Publication |
Proc. 9-th WMSCI |
Abbreviated Journal |
Proc. 9-th WMSCI |
| Volume |
9 |
Issue |
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Pages |
154-159 |
| Keywords |
NbN HEB mixers |
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International Institute of Informatics and Systemics |
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no |
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547 |
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