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My interest in sources of broadband time-energy entangled photons and squeezed light is rooted in my graduate studies 20 years ago. Today, my group generates record-high time-energy entanglement with octave-spanning bandwidth, which indicates a temporal correlation between the photons as short as a single optical cycle. When parametric sources, such as down-conversion (PDC) or four-wave mixing (FWM) are pumped by a narrowband laser and phase matched across a wide bandwidth (>110THz in an ultra-high flux of single bi-photons is produced (up to 10^14 photons/s) with extreme time-energy entanglement (or two-mode squeezing), which is highly attractive for quantum technology, such as high-speed QKD, broadband quantum sensing and photonic quantum computation.
Today, we develop sources based on both PDC and FWM using various configurations: free space (crystal) and guided (fiber), single pass and cavity, spontaneous and stimulated. We focus on sources of single spatial mode, but highly multimode in frequency (or time) but have a. To evaluate the quantum correlation and entanglement of these sources we employ broadband parametric homodyne measurement, as outlined hereon.

Sources of ultra-broadband quantum light: Research

Relevant publications:

       Barak Dayan, Avi Pe'er, Asher A Friesem and Yaron Silberberg, "Nonlinear interactions with an ultrahigh flux of broadband entangled photons", Phys. Rev. Lett. 94, 043602 (2005)

       Avi Pe'er, Barak Dayan, Marija Vucelja, Yaron Silberberg and Asher A. Friesem, "Quantum lithography by coherent control of classical light pulses", Opt. Express 12, 6600-6 (2004)

       Avi Pe'er, Barak Dayan, Yaron Silberberg and Asher A Friesem, "Optical code-division multiple access using broadband parametrically generated light", J. Lightwave Technol. 22, 1463-71 (2004)

       Barak Dayan, Avi Pe'er, Asher A Friesem and Yaron Silberberg, "Two photon absorption and coherent control with broadband down-converted light", Phys. Rev. Lett. 93, 023005 (2004)

       Barak Dayan, Avi Pe'er, Asher A Friesem and Yaron Silberberg “Coherent control with broadband squeezed vacuum”, arXiv:quant-ph/302038 Feb (2003)

       Selected for PRL Editors' Suggestion: Rafi Z. Vered, Yaakov Shaked, Yelena Ben-Or, Michael Rosenbluh and Avi Pe’er, "Classical-to-quantum Transition with Broadband Four-Wave Mixing", Phys. Rev. Lett. 114, 063902 (2015).

        Yaakov Shaked, Shai Yefet, Tzahi Geller and Avi Pe'er, "Octave-spanning spectral phase control for single-cycle bi-photons", New J. Phys. 17, 073024 (2015).

        Yaakov Shaked, Roey Pomerantz, Rafi Z. Vered and Avi Pe'er, "Observing the nonclassical nature of ultra-broadband bi-photons at ultrafast speed", New J. Phys. 16, 053012 (2014).

        Nir Nechushtan, Hanzhong Zhang, Mallachi Meller and Avi Pe'er, "Optimal detection of ultra-broadband bi-photons with quantum nonlinear SU(1,1) interference", New J. Phys. 23, 113003 (2021)

        Leon Bello, Yoad Michael, Michael Rosenbluh, Eliahu Cohen and Avi Pe’er, “Broadband complex two-mode quadratures for quantum optics”, Optics Express 29, 41282 (2021)

       Yoad Michael, Isaac Jonas, Leon Bello, Mallachi-Ellia Meller, Eliahu Cohen, Michael Rosenbluh, and Avi Pe’er, “Augmenting the Sensing Performance of Entangled Photon Pairs through Asymmetry”, Phys. Rev. Lett. 127, 173603 (2021)

       Yoad Michael, Leon Bello, Michael Rosenbluh and Avi Pe’er, “Squeezing-enhanced Raman Spectroscopy”,  npj  – Quantum Information 5, 81 (2019)

       Xuan Zhu, Chun-Hung Chang, Carlos González-Arciniegas, Avi Pe’er, Jacob Higgins, and Olivier Pfister, “Hypercubic cluster states in the phase-modulated quantum optical frequency comb”, Optica 8, 281 (2021)

       Yaakov Shaked, Yoad Michael, Rafi Vered, Leon Bello, Michael Rosenbluh and Avi Pe’er, “Lifting the Bandwidth limit of Optical Homodyne Measurement with Broadband Parametric Amplification”, Nat. Commun., 9, 609 (2018)

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