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Dashtabi, Mahdi Mozdoor (author), Khoshmehr, Mohammad Talebi (author), Nikbakht, Hamed (author), Lopez Rodriguez, B. (author), Sharma, N. (author), Esmaeil Zadeh, I.Z. (author), Akca, B. Imran (author)Photonic integrated circuits (PICs) are enabling breakthroughs in several areas, including quantum computing, neuromorphic processors, wearable devices, and more. Nevertheless, existing PIC measurement methods lack the spectral precision, speed, and sensitivity required for refining current applications and exploring new frontiers such as...journal article 2024
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Los, J. W.Niels (author), Sidorova, Mariia (author), Lopez Rodriguez, B. (author), Qualm, H.P. (author), Chang, J. (author), Steinhauer, Stephan (author), Zwiller, Val (author), Esmaeil Zadeh, I.Z. (author)Since their first demonstration in 2001 [Gol’tsman et al., Appl. Phys. Lett. 79, 705-707 (2001)], superconducting-nanowire single-photon detectors (SNSPDs) have witnessed two decades of great developments. SNSPDs are the detector of choice in most modern quantum optics experiments and are slowly finding their way into other photon-starved...journal article 2024
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Chang, J. (author), Gao, Jun (author), Esmaeil Zadeh, I.Z. (author), Elshaari, Ali W. (author), Zwiller, Val (author)At the core of quantum photonic information processing and sensing, two major building pillars are single-photon emitters and single-photon detectors. In this review, we systematically summarize the working theory, material platform, fabrication process, and game-changing applications enabled by state-of-the-art quantum dots in nanowire...review 2023
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- Chang, J. (author), Esmaeil Zadeh, I.Z. (author) journal article 2023
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Lopez Rodriguez, B. (author), van der Kolk, R.J.H. (author), Aggarwal, Samarth (author), Sharma, N. (author), Li, Z.Z.L. (author), van der Plaats, D.W. (author), Scholte, T.C. (author), Chang, J. (author), Groeblacher, S. (author), Pereira, S.F. (author), Bhaskaran, Harish (author), Esmaeil Zadeh, I.Z. (author)Integrated photonic platforms have proliferated in recent years, each demonstrating its unique strengths and shortcomings. Given the processing incompatibilities of different platforms, a formidable challenge in the field of integrated photonics still remains for combining the strengths of different optical materials in one hybrid integrated...journal article 2023
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Lopez Rodriguez, B. (author), Chang, J. (author), Los, Johannes W.N. (author), Steinhauer, Stephan (author), Zwiller, Val (author), Esmaeil Zadeh, I.Z. (author)Ultra-high system detection efficiency (SDE) s uperconducting nanowire single-photon detectors are demonstrated for a broad range of wavelengths, from UV to mid-infrared, opening novel possibilities in the fields of quantum photonics, neuroimaging and astronomy.conference paper 2022
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Xia, Fei (author), Gevers, Monique (author), Fognini, Andreas (author), Mok, Aaron T. (author), Li, Bo (author), Akabri, Najva (author), Esmaeil Zadeh, I.Z. (author), Qin-Dregely, Y. (author), Xu, Chris (author)Using short-wave infrared wavelength advantages, we demonstrate one-photon fluorescence confocal microscopy of adult mouse brains with penetration depths up to 1.7mm. This is achieved by labeling quantum dots with 1300 nm excitation and 1700 nm emission and detecting them with a single-photon superconducting nanowire detector.conference paper 2022
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Chang, J. (author), Los, Johannes W.N. (author), Gourgues, Ronan (author), Steinhauer, Stephan (author), Dorenbos, S.N. (author), Pereira, S.F. (author), Urbach, Paul (author), Zwiller, Val (author), Esmaeil Zadeh, I.Z. (author)Shortly after their inception, superconducting nanowire single-photon detectors (SNSPDs) became the leading quantum light detection technology. With the capability of detecting single-photons with near-unity efficiency, high time resolution, low dark count rate, and fast recovery time, SNSPDs outperform conventional single-photon detection...journal article 2022
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Wang, Feifei (author), Ren, Fuqiang (author), Ma, Zhuoran (author), Qu, Liangqiong (author), Gourgues, Ronan (author), Esmaeil Zadeh, I.Z. (author), Los, Johannes W.N. (author), Qin-Dregely, Y. (author), Dai, Hongjie (author)Light scattering by biological tissues sets a limit to the penetration depth of high-resolution optical microscopy imaging of live mammals in vivo. An effective approach to reduce light scattering and increase imaging depth is to extend the excitation and emission wavelengths to the second near-infrared window (NIR-II) at >1,000 nm, also...journal article 2022
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Xia, Fei (author), Gevers, Monique (author), Fognini, Andreas (author), Mok, Aaron T. (author), Li, Bo (author), Akbari, Najva (author), Esmaeil Zadeh, I.Z. (author), Qin-Dregely, Y. (author), Xu, Chris (author)Optical microscopy is a valuable tool for in vivo monitoring of biological structures and functions because of its noninvasiveness. However, imaging deep into biological tissues is challenging due to the scattering and absorption of light. Previous research has shown that the two optimal wavelength windows for high-resolution deep mouse brain...journal article 2021
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Kolenov, D. (author), Esmaeil Zadeh, I.Z. (author), Horsten, R.C. (author), Pereira, S.F. (author)Coherent Fourier scatterometry (CFS) has been introduced to fulfil the need for noninvasive and sensitive inspection of subwavelength nanoparticles in the far field. The technique is based on detecting the scattering of coherent light when it is focused on isolated nanoparticles. In the present work, we describe the results of an experimental...journal article 2021
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Elshaari, Ali W. (author), Skalli, Anas (author), Gyger, Samuel (author), Nurizzo, Martin (author), Schweickert, Lucas (author), Esmaeil Zadeh, I.Z. (author), Svedendahl, Mikael (author), Steinhauer, Stephan (author), Zwiller, Val (author)Hybrid integration provides an important avenue for incorporating atom-like solid-state single-photon emitters into photonic platforms that possess no optically-active transitions. Hexagonal boron nitride (hBN) is particularly interesting quantum emitter for hybrid integration, as it provides a route for room-temperature quantum photonic...journal article 2021
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Esmaeil Zadeh, I.Z. (author), Chang, J. (author), Los, Johannes W.N. (author), Gyger, Samuel (author), Elshaari, Ali W. (author), Steinhauer, Stephan (author), Dorenbos, S.N. (author), Zwiller, Val (author)Two decades after their demonstration, superconducting nanowire single-photon detectors (SNSPDs) have become indispensable tools for quantum photonics as well as for many other photon-starved applications. This invention has not only led to a burgeoning academic field with a wide range of applications but also triggered industrial efforts....journal article 2021
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Chang, J. (author), Los, J. W.N. (author), Tenorio Pearl, J.O. (author), Noordzij, N. (author), Gourgues, R.B.M. (author), Guardiani, A. (author), Zichi, J. R. (author), Pereira, S.F. (author), Urbach, Paul (author), Zwiller, V. (author), Dorenbos, S.N. (author), Esmaeil Zadeh, I.Z. (author)Single photon detectors are indispensable tools in optics, from fundamental measurements to quantum information processing. The ability of superconducting nanowire single photon detectors (SNSPDs) to detect single photons with unprecedented efficiency, short dead time, and high time resolution over a large frequency range enabled major...journal article 2021
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Branny, Artur (author), Didier, Pierre (author), Zichi, Julien (author), Esmaeil Zadeh, I.Z. (author), Steinhauer, Stephan (author), Zwiller, Val (author), Vogt, Ulrich (author)We characterized the performance of abiased superconducting nanowire to detect X-ray photons. The device, made of a 10 nm thin NbTiN film and fabricated on a dielectric substrate (SiO2, Nb3O5) detected 1000 times larger signal than anticipated from direct X-ray absorption. We attributed this effect to X-ray induced generation of secondary...journal article 2021
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Elsinger, Lukas (author), Gourgues, R.B.M. (author), Esmaeil Zadeh, I.Z. (author), Maes, Jorick (author), Guardiani, A. (author), Bulgarini, G. (author), Pereira, S.F. (author), Dorenbos, S.N. (author), Zwiller, Val (author)Future quantum optical networks will require an integrated solution to multiplex suitable sources and detectors on a low-loss platform. Here we combined superconducting single-photon detectors with colloidal PbS/CdS quantum dots (QDs) and low-loss silicon nitride passive photonic components to show their combined operation at cryogenic...conference paper 2020
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Elshaari, Ali W. (author), Iovan, Adrian (author), Gyger, Samuel (author), Esmaeil Zadeh, I.Z. (author), Zichi, Julien (author), Yang, Lily (author), Steinhauer, Stephan (author), Zwiller, Val (author)We use dispersion engineering to control the signal propagation speed in the feed lines of superconducting single-photon detectors. Using this technique, we demonstrate time-division-multiplexing of two-pixel detectors connected with a slow-RF transmission line, all realized using planar geometry requiring a single lithographic step. Through...journal article 2020
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Esmaeil Zadeh, I.Z. (author), Chang, J. (author), Van Staaden, Yuri J. (author), Swens, Jeroen P.E. (author), Dobrovolskiy, S.M. (author), Schaart, D.R. (author), Pereira, S.F. (author), Zwiller, Val (author), Dorenbos, S.N. (author)A broad range of scientific and industrial disciplines require precise optical measurements at very low light levels. Single-photon detectors combining high efficiency and high time resolution are pivotal in such experiments. By using relatively thick films of NbTiN (8-11 nm) and improving the pattern fidelity of the nanostructure of the...journal article 2020
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Gourgues, R.B.M. (author), Los, J.W.N. (author), Zichi, Julien (author), Chang, J. (author), Kalhor, N. (author), Bulgarini, G. (author), Dorenbos, S.N. (author), Zwiller, Val (author), Esmaeil Zadeh, I.Z. (author)We experimentally investigate the performance of NbTiN superconducting nanowire single photon detectors above the base temperature of a conventional Gifford-McMahon cryocooler (2.5 K). By tailoring design and thickness (8 - 13 nm) of the detectors, high performance, high operating temperature, single-photon detection from the visible to...journal article 2019
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Elsinger, Lukas (author), Gourgues, R.B.M. (author), Esmaeil Zadeh, I.Z. (author), Maes, Jorick (author), Guardiani, A. (author), Bulgarini, G. (author), Pereira, S.F. (author), Dorenbos, S.N. (author), Zwiller, V.G. (author)Single-photon sources and detectors are indispensable building blocks for integrated quantum photonics, a research field that is seeing ever increasing interest for numerous applications. In this work, we implemented essential components for a quantum key distribution transceiver on a single photonic chip. Plasmonic antennas on top of silicon...journal article 2019
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