Chih-Sung Chuu

National Tsing Hua University, Hsin-chu-hsien, Taiwan, Taiwan

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Publications (7)28.81 Total impact

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    ABSTRACT: We demonstrate coherent control of single-photon absorption and reemission in a two-level cold atomic ensemble. This is achieved by interfering the incident single-photon wave packet with the emission (or scattering) wave. For a photon with an exponential growth waveform with a time constant equal to the excited-state lifetime, we observe that the single-photon emission probability during the absorption can be suppressed due to the perfect destructive interference. After the incident photon waveform is switched off, the absorbed photon is then reemitted to the same spatial mode as that of the incident photon with an efficiency of 20%. For a photon with an exponential decay waveform with the same time constant, both the absorption and reemission occur within the waveform duration. Our experimental results suggest that the absorption and emission of a single photon in a two-level atomic ensemble may possibly be manipulated by shaping its waveform in the time domain.
    Physical Review Letters 12/2012; 109(26):263601. · 7.94 Impact Factor
  • Chih-Sung Chuu, G. Y. Yin, S. E. Harris
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    ABSTRACT: We demonstrate a miniature source of long biphotons utilizing the cluster effect and double-pass pumping in a monolithic doubly resonant parametric down-converter. We obtain a biphoton correlation time of 17.1 ns with a generation rate of 1.10×105 biphotons/(s mW) and an estimated linewidth of 8.3 MHz.
    Applied Physics Letters 08/2012; 101(5). · 3.79 Impact Factor
  • Chih-Sung Chuu, G. Y. Yin, Stephen E. Harris
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    ABSTRACT: An ultrabright compact source of long biphotons is essential for scalable quantum networks. Here we report the generation of long biphotons utilizing the cluster effect in a monolithic doubly resonant parametric down-converter. The biphoton generation rate and spectral brightness are 110 and 41 times larger, respectively, than previously reported. This source will find applications in quantum repeater protocols.
    06/2012;
  • Source
    Chih-Sung Chuu, S E Harris
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    ABSTRACT: We calculate the properties of a biphoton source based on resonant backward-wave spontaneous parametric down-conversion. We show that the biphotons are generated in a single longitudinal mode having a subnatural linewidth and a Glauber correlation time exceeding 65 ns.
    Physical Review A 05/2011; 83(6). · 3.04 Impact Factor
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    ABSTRACT: We describe a proof-of-principal experiment demonstrating the use of spread spectrum technology at the single photon level. We show how single photons with a prescribed temporal shape, in the presence of interfering noise, may be hidden and recovered.
    Physical Review Letters 06/2010; 104(22):223601. · 7.94 Impact Factor
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    ABSTRACT: We describe a proof-of-principal experiment demonstrating a Fourier technique for measuring the shape of biphoton wavepackets. The technique is based on the use of synchronously driven fast modulators and slow (integrating) detectors.
    Physical Review A 06/2009; · 3.04 Impact Factor
  • Source
    Chih-Sung Chuu, Chuanwei Zhang
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    ABSTRACT: We study the suppression of noise-induced phase decoherence in a single atomic qubit by employing pulse sequences. The atomic qubit is composed of a single neutral atom in a far-detuned optical dipole trap and the phase decoherence may originate from the laser intensity and beam pointing fluctuations as well as magnetic field fluctuations. We show that suitable pulse sequences may prolongate the qubit coherence time substantially as comparing to the conventional spin echo pulse. Comment: 4 pages, 3 figures
    Physical Review A 05/2009; · 3.04 Impact Factor

Publication Stats

5 Citations
2 Downloads
262 Views
28.81 Total Impact Points

Institutions

  • 2012
    • National Tsing Hua University
      • Department of Physics
      Hsin-chu-hsien, Taiwan, Taiwan
  • 2009–2012
    • Stanford University
      Palo Alto, California, United States