Serkan Ateş | İZMİR INSTITUTE OF TECHNOLOGY (original) (raw)
Papers by Serkan Ateş
Physical Review B, 2008
A systematic experimental and theoretical study of first-order coherence properties of high-quant... more A systematic experimental and theoretical study of first-order coherence properties of high-quantum-dot micropillar lasers is presented. A nonlinear increase in the coherence length is found in the transition regime from spontaneous to dominantly stimulated emission. This increase is accompanied by a qualitative change in the first-order field-correlation function g 1 from a Gaussian-type profile to an exponential behavior, which is in excellent agreement with a microscopic semiconductor laser theory. Our results also demonstrate a decreasing ...
CLEO: 2013, 2013
ABSTRACT Using background-free quantum frequency conversion, two spectrally separate excitonic tr... more ABSTRACT Using background-free quantum frequency conversion, two spectrally separate excitonic transitions from a single semiconductor quantum dot are converted to a single wavelength, and two-photon interference on the frequency-converted signal is demonstrated.
CLEO: 2013, 2013
ABSTRACT Using background-free quantum frequency conversion, two spectrally separate excitonic tr... more ABSTRACT Using background-free quantum frequency conversion, two spectrally separate excitonic transitions from a single semiconductor quantum dot are converted to a single wavelength, and two-photon interference on the frequency-converted signal is demonstrated.
Frontiers in Optics 2012/Laser Science XXVIII, 2012
Serkan Ates1,2, Imad Agha1,2, Antonio Badolato3, and Kartik Srinivasan1 1Center for Nanoscale Sci... more Serkan Ates1,2, Imad Agha1,2, Antonio Badolato3, and Kartik Srinivasan1 1Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 2Maryland NanoCenter, University of Maryland, College Park, MD, 20742 3Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA *Corresponding author: serkan.ates@nist.gov ... Abstract: Background-free quantum frequency upconversion of single photons emitted from a single semiconductor quantum dot is demonstrated. The ...
Asia Communications and Photonics Conference, 2012
Excitation power dependent cavity mode intensity and linewidth are shown inFig. 1(a). In regimes ... more Excitation power dependent cavity mode intensity and linewidth are shown inFig. 1(a). In regimes Ⅰ and Ⅲ , the output intensity increases linearly with the input power. A smooth nonlinear increase of output power can be clearly traced in regime Ⅱ, which is the signature of onset of lasing. The theory predicts a similar behaviour as observed experimentally by assuming realistic parameters of cavity quality factor Q = 7800, the number of quantum dots N = 4, spontaneous emission coupling factor β = 0.15 and the mode volume V = 0.52 μm3. The linewidth decreases in regime Ⅰ, ...
2014 IEEE Photonics Conference, 2014
Frontiers in Optics 2014, 2014
IEEE Photonics Conference 2012, 2012
Abstract—Single photon sources based on a self-assembled quantum dot in nanophotonic waveguides, ... more Abstract—Single photon sources based on a self-assembled quantum dot in nanophotonic waveguides, gratings, and cavities are interfaced with nonlinear media and electro-optic modulators to demonstrate quantum frequency conversion and amplitude modulation of single photon states. I. INTRODUCTION Single photon sources (SPSs) have many potential uses in quantum information science [1]. Important characteristics of a SPS include whether photon generation is triggered ('ondemand') or heralded, the brightness of the source into ...
CLEO: 2014, 2014
ABSTRACT We review recent experiments demonstrating quantum frequency conversion (QFC) of single ... more ABSTRACT We review recent experiments demonstrating quantum frequency conversion (QFC) of single photon states of light and discuss perspectives for combining QFC with temporal wavepacket shaping. Progress in developing nanophotonic geometries for QFC is also presented.
Frontiers in Optics 2013, 2013
ABSTRACT We describe different experiments demonstrating quantum frequency conversion of single p... more ABSTRACT We describe different experiments demonstrating quantum frequency conversion of single photons produced by a quantum dot, and present efforts at developing new frequency converters using four-wave-mixing and cavity optomechanics in the Si3N4 platform.
Optics letters, 2014
We experimentally demonstrate spectral broadening and shaping of exponentially-decaying nanosecon... more We experimentally demonstrate spectral broadening and shaping of exponentially-decaying nanosecond pulses via nonlinear mixing with a phase-modulated pump in a periodically poled lithium niobate (PPLN) waveguide. 1550 nm pump light is imprinted with a temporal phase and used to upconvert a weak 980 nm pulse to 600 nm while simultaneously broadening the spectrum to that of a Lorentzian pulse up to 10 times shorter. While the current experimental demonstration is for spectral shaping, we also provide a numerical study showing the feasibility of subsequent spectral phase correction to achieve temporal compression and reshaping of a 1 ns mono-exponentially decaying pulse to a 250 ps Lorentzian, which would constitute a complete spectrotemporal waveform shaping protocol. This method, which uses quantum frequency conversion in PPLN with >100:1 signal-to-noise ratio, is compatible with single photon states of light.
Scientific reports, 2013
Single epitaxially-grown semiconductor quantum dots have great potential as single photon sources... more Single epitaxially-grown semiconductor quantum dots have great potential as single photon sources for photonic quantum technologies, though in practice devices often exhibit nonideal behavior. Here, we demonstrate that amplitude modulation can improve the performance of quantum-dot-based sources. Starting with a bright source consisting of a single quantum dot in a fiber-coupled microdisk cavity, we use synchronized amplitude modulation to temporally filter the emitted light. We observe that the single photon purity, temporal overlap between successive emission events, and indistinguishability can be greatly improved with this technique. As this method can be applied to any triggered single photon source, independent of geometry and after device fabrication, it is a flexible approach to improve the performance of systems based on single solid-state quantum emitters, which often suffer from excess dephasing and multi-photon background emission.
We report on the direct observation of the electromagnetically induced transparency (EIT) linesha... more We report on the direct observation of the electromagnetically induced transparency (EIT) lineshape of cold 87 Rb atoms above and below the transition temperature for Bose-Einstein condensation (BEC). Similar results are observed in both temperature regimes, with an absorption reduction of about 60%. Good agreement with a theoretical model is discussed.
We demonstrate sideband-resolved Si3N4 optomechanical crystals supporting 10 5 quality factor opt... more We demonstrate sideband-resolved Si3N4 optomechanical crystals supporting 10 5 quality factor optical modes at 980 nm, coupled to ≈ 4 GHz frequency mechanical modes with quality factors of ≈ 3000. Optomechanical electromagnetically induced transparency and absorption are observed at room temperature and in atmosphere with intracavity photon numbers of the order of 10 4 .
ABSTRACT We use photon correlation measurements to study blinking in single, epitaxially-grown se... more ABSTRACT We use photon correlation measurements to study blinking in single, epitaxially-grown self-assembled InAs quantum dots situated in circular Bragg grating and microdisk cavities. The normalized second-order correlation function g(2)(\tau) is studied across eleven orders of magnitude in time, and shows signatures of blinking over timescales ranging from tens of nanoseconds to tens of milliseconds. The g(2)(\tau) data is fit to a multi-level system rate equation model that includes multiple non-radiating (dark) states, from which radiative quantum yields significantly less than 1 are obtained. This behavior is observed even in situations for which a direct histogramming analysis of the emission time-trace data produces inconclusive results.
Frontiers in Optics 2013, 2013
ABSTRACT We demonstrate frequency upconversion and downconversion of photons between the 980 nm a... more ABSTRACT We demonstrate frequency upconversion and downconversion of photons between the 980 nm and 1550 nm bands using four-wave-mixing Bragg scattering in a chip-scale silicon nitride waveguide.
Physical Review B, 2008
A systematic experimental and theoretical study of first-order coherence properties of high-quant... more A systematic experimental and theoretical study of first-order coherence properties of high-quantum-dot micropillar lasers is presented. A nonlinear increase in the coherence length is found in the transition regime from spontaneous to dominantly stimulated emission. This increase is accompanied by a qualitative change in the first-order field-correlation function g 1 from a Gaussian-type profile to an exponential behavior, which is in excellent agreement with a microscopic semiconductor laser theory. Our results also demonstrate a decreasing ...
CLEO: 2013, 2013
ABSTRACT Using background-free quantum frequency conversion, two spectrally separate excitonic tr... more ABSTRACT Using background-free quantum frequency conversion, two spectrally separate excitonic transitions from a single semiconductor quantum dot are converted to a single wavelength, and two-photon interference on the frequency-converted signal is demonstrated.
CLEO: 2013, 2013
ABSTRACT Using background-free quantum frequency conversion, two spectrally separate excitonic tr... more ABSTRACT Using background-free quantum frequency conversion, two spectrally separate excitonic transitions from a single semiconductor quantum dot are converted to a single wavelength, and two-photon interference on the frequency-converted signal is demonstrated.
Frontiers in Optics 2012/Laser Science XXVIII, 2012
Serkan Ates1,2, Imad Agha1,2, Antonio Badolato3, and Kartik Srinivasan1 1Center for Nanoscale Sci... more Serkan Ates1,2, Imad Agha1,2, Antonio Badolato3, and Kartik Srinivasan1 1Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 2Maryland NanoCenter, University of Maryland, College Park, MD, 20742 3Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA *Corresponding author: serkan.ates@nist.gov ... Abstract: Background-free quantum frequency upconversion of single photons emitted from a single semiconductor quantum dot is demonstrated. The ...
Asia Communications and Photonics Conference, 2012
Excitation power dependent cavity mode intensity and linewidth are shown inFig. 1(a). In regimes ... more Excitation power dependent cavity mode intensity and linewidth are shown inFig. 1(a). In regimes Ⅰ and Ⅲ , the output intensity increases linearly with the input power. A smooth nonlinear increase of output power can be clearly traced in regime Ⅱ, which is the signature of onset of lasing. The theory predicts a similar behaviour as observed experimentally by assuming realistic parameters of cavity quality factor Q = 7800, the number of quantum dots N = 4, spontaneous emission coupling factor β = 0.15 and the mode volume V = 0.52 μm3. The linewidth decreases in regime Ⅰ, ...
2014 IEEE Photonics Conference, 2014
Frontiers in Optics 2014, 2014
IEEE Photonics Conference 2012, 2012
Abstract—Single photon sources based on a self-assembled quantum dot in nanophotonic waveguides, ... more Abstract—Single photon sources based on a self-assembled quantum dot in nanophotonic waveguides, gratings, and cavities are interfaced with nonlinear media and electro-optic modulators to demonstrate quantum frequency conversion and amplitude modulation of single photon states. I. INTRODUCTION Single photon sources (SPSs) have many potential uses in quantum information science [1]. Important characteristics of a SPS include whether photon generation is triggered ('ondemand') or heralded, the brightness of the source into ...
CLEO: 2014, 2014
ABSTRACT We review recent experiments demonstrating quantum frequency conversion (QFC) of single ... more ABSTRACT We review recent experiments demonstrating quantum frequency conversion (QFC) of single photon states of light and discuss perspectives for combining QFC with temporal wavepacket shaping. Progress in developing nanophotonic geometries for QFC is also presented.
Frontiers in Optics 2013, 2013
ABSTRACT We describe different experiments demonstrating quantum frequency conversion of single p... more ABSTRACT We describe different experiments demonstrating quantum frequency conversion of single photons produced by a quantum dot, and present efforts at developing new frequency converters using four-wave-mixing and cavity optomechanics in the Si3N4 platform.
Optics letters, 2014
We experimentally demonstrate spectral broadening and shaping of exponentially-decaying nanosecon... more We experimentally demonstrate spectral broadening and shaping of exponentially-decaying nanosecond pulses via nonlinear mixing with a phase-modulated pump in a periodically poled lithium niobate (PPLN) waveguide. 1550 nm pump light is imprinted with a temporal phase and used to upconvert a weak 980 nm pulse to 600 nm while simultaneously broadening the spectrum to that of a Lorentzian pulse up to 10 times shorter. While the current experimental demonstration is for spectral shaping, we also provide a numerical study showing the feasibility of subsequent spectral phase correction to achieve temporal compression and reshaping of a 1 ns mono-exponentially decaying pulse to a 250 ps Lorentzian, which would constitute a complete spectrotemporal waveform shaping protocol. This method, which uses quantum frequency conversion in PPLN with >100:1 signal-to-noise ratio, is compatible with single photon states of light.
Scientific reports, 2013
Single epitaxially-grown semiconductor quantum dots have great potential as single photon sources... more Single epitaxially-grown semiconductor quantum dots have great potential as single photon sources for photonic quantum technologies, though in practice devices often exhibit nonideal behavior. Here, we demonstrate that amplitude modulation can improve the performance of quantum-dot-based sources. Starting with a bright source consisting of a single quantum dot in a fiber-coupled microdisk cavity, we use synchronized amplitude modulation to temporally filter the emitted light. We observe that the single photon purity, temporal overlap between successive emission events, and indistinguishability can be greatly improved with this technique. As this method can be applied to any triggered single photon source, independent of geometry and after device fabrication, it is a flexible approach to improve the performance of systems based on single solid-state quantum emitters, which often suffer from excess dephasing and multi-photon background emission.
We report on the direct observation of the electromagnetically induced transparency (EIT) linesha... more We report on the direct observation of the electromagnetically induced transparency (EIT) lineshape of cold 87 Rb atoms above and below the transition temperature for Bose-Einstein condensation (BEC). Similar results are observed in both temperature regimes, with an absorption reduction of about 60%. Good agreement with a theoretical model is discussed.
We demonstrate sideband-resolved Si3N4 optomechanical crystals supporting 10 5 quality factor opt... more We demonstrate sideband-resolved Si3N4 optomechanical crystals supporting 10 5 quality factor optical modes at 980 nm, coupled to ≈ 4 GHz frequency mechanical modes with quality factors of ≈ 3000. Optomechanical electromagnetically induced transparency and absorption are observed at room temperature and in atmosphere with intracavity photon numbers of the order of 10 4 .
ABSTRACT We use photon correlation measurements to study blinking in single, epitaxially-grown se... more ABSTRACT We use photon correlation measurements to study blinking in single, epitaxially-grown self-assembled InAs quantum dots situated in circular Bragg grating and microdisk cavities. The normalized second-order correlation function g(2)(\tau) is studied across eleven orders of magnitude in time, and shows signatures of blinking over timescales ranging from tens of nanoseconds to tens of milliseconds. The g(2)(\tau) data is fit to a multi-level system rate equation model that includes multiple non-radiating (dark) states, from which radiative quantum yields significantly less than 1 are obtained. This behavior is observed even in situations for which a direct histogramming analysis of the emission time-trace data produces inconclusive results.
Frontiers in Optics 2013, 2013
ABSTRACT We demonstrate frequency upconversion and downconversion of photons between the 980 nm a... more ABSTRACT We demonstrate frequency upconversion and downconversion of photons between the 980 nm and 1550 nm bands using four-wave-mixing Bragg scattering in a chip-scale silicon nitride waveguide.