Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Deterministic radiative coupling of two semiconductor quantum dots to the optical mode of a photonic crystal nanocavity

Abstract

A system of two site-controlled semiconductor quantum dots (QDs) is deterministically integrated with a photonic crystal membrane nano-cavity. The two QDs are identified via their reproducible emission spectral features, and their coupling to the fundamental cavity mode is established by emission co-polarization and cavity feeding features. A theoretical model accounting for phonon interaction and pure dephasing reproduces the observed results and permits extraction of the light-matter coupling constant for this system. The demonstrated approach offers a platform for scaling up the integration of QD systems and nano-photonic elements for integrated quantum photonics applications.

Introduction

Studies of the radiative coupling of single semiconductor quantum dots (QDs) to photonic cavities unravel cavity quantum electrodynamic (c-QED) effects in the solid state1, 2 and suggest robust and scalable platforms for integrated quantum photonics, e.g. for quantum information technologies3,4,5. Scaling up these investigations to multi-QD systems is essential for implementing promising architectures based on quantum networks6, 7 or multiplexed single photon sources8. Although first steps in this direction have been taken using self-assembled QDs, demonstrating weak or strong coupling of pairs of dots to a mode of a micropillar9,10,11, microdisk12 or photonic crystal (PhC) cavity13,14,15,16,17, systematic scaling requires technologies capable of deterministic QD-cavity integration18,19,20.

In this work, we demonstrate such deterministic radiative coupling of two site-controlled QDs a PhC cavity, manifested by the observation of co-polarization and Purcell enhancement of their photoluminescence and confirmed with a microscopic model21. These results illustrate a scalable approach to QD-based integrated quantum photonics.

Results

The double-QD structure integrated with a modified L3 PhC membrane cavity (Fig. 1) was produced using site-controlled InGaAs/GaAs pyramidal QD structures, which ensured a mutual alignment accuracy of ~50 nm 21,22,23. In the vicinity of the double-QD structures, additional control structures containing a single QD at the center of an L3 PhC cavity were implemented (same design as in Fig. 1b). At sufficiently low excitation power, the typical off-resonance micro-photoluminescence (μPL) spectrum of such a control structure appears as shown in Fig. 2a. This spectrum features only 3 peaks: the neutral exciton (X), the negatively charged exciton (X ) and the biexciton (2X). This spectral “fingerprint” of a single QD is highly reproducible in terms of the energy separation between the X and the X lines, statistically evaluated to be 4.9 ± 0.3 meV on this specific sample24. Indeed, the μPL spectrum of the double-QD system seen in Fig. 2b, also far detuned from the cavity mode (CM) resonance, exhibits spectral lines in which the X and X of each dot can easily be identified by comparison with Fig. 2a. The binding energy of the 2X, on the other hand, is more sensitive to the details of the QD heterostructure, varying between +1 meV to −4 meV, which is also reflected in the double-QD spectra24. The energy difference between the neutral excitons of dots A and B is consistent with the inhomogeneous broadening of the QD ensemble (i.e. the spectral width of the QD ensemble emission, which is ~10 meV, including X and X populations) as determined from μPL spectra of QD ensembles. Contrary to previous studies based on self-assembled QDs lacking site control9,10,11, 13,14,15,16,17, our deterministic integration yields unambiguous evidence for the optical coupling of the QD pair with the CM. Figure 3 shows the spectrum of two pyramidal QDs (A and B) tuned in resonance with the fundamental mode (CM) of the L3 cavity by varying the sample temperature. All spectral features of the two QD excitons and the cavity mode (Q = 2200), are unequivocally identified. At 40 K, the neutral exciton X A of dot A and the negatively charged exciton \({X}_{B}^{-}\) of dot B simultanously overlap with the CM.

Figure 1
figure 1

Deterministic integration of two pyramidal QDs with a modified L3 PhC membrane cavity. (a) Schematic illustration. (b) Simulated near field intensity pattern of the fundamental optical mode. The distance between the two QDs (350 nm) is equal to that of the field lobes as indicated.

Figure 2
figure 2

Comparison of PL semilogarithmic spectra of pyramidal QDs in off-resonance PhC L3 cavities. (a) Typical off-resonant spectrum of a single QD at low excitation. (b) Two QDs with corresponding spectral lines labeled A and B. The neutral exciton X B and the bi-exciton 2X B lines overlap in the case of QD B . Separations of spectral features are indicated in meV. Insets: Corresponding linear scale spectra.

Figure 3
figure 3

PL spectra of two QDs coupled to the same PhC cavity mode. (a) Semi-logarithmic plot showing the cavity mode CM tuned spectrally in between the exciton lines belonging to two spatially separated QDs A and B. Energy separations are indicated in meV. (b) Temperature dependence (10–70 K) of the PL spectra (normalized to maximum intensity).

Evidence for (weak) coupling of both QD excitons to the common CM is presented in Fig. 4a,b, which depicts the measured and modeled (see Supplementary material part A) polarization-resolved PL spectra of the structure, where I V and I H are the spectra resolved in linear polarization along the vertical (V) and horizontal (H) directions indicated in Fig. 1b. The measured spectra focus on the \({X}_{B}^{-}\) and X A features, each spectrum centered at the average frequency of these two transitions \({\omega }_{0}=({\omega }_{{X}_{B}^{-}}+{\omega }_{{X}_{A}})\mathrm{/2}\). The CM is resonant with \({X}_{B}^{-}\) at T ~ 20 K and with X A at T~ 55 K. With decreasing detuning, the QD excitons increasingly acquire the V polarization of the CM, as for single-QD cavity structures22, 25. The very good agreement with the calculated spectra substantiates that both QDs are radiatively coupled to the same CM. The fixed simulation parameters extracted from the experimental data are the QD spontaneous emission rates \(\hslash {\gamma }_{A}=\hslash {\gamma }_{B}=0.2\,\mu eV\), the QD pure dephasing rates \(\hslash {\gamma }_{A}^{d}=104\,\mu eV\) and \(\hslash {\gamma }_{B}^{d}=230\,\mu eV\), the cavity mode loss rate \(\hslash \kappa =650\,\mu eV\), and the fitting parameters are the incoherent QD pumping rate \(\hslash P=1\,\mu eV\), the QD-cavity coupling strengths \(\hslash {g}_{0}^{A}=\hslash {g}_{0}^{B}=50\,\mu eV\) and the phonon scattering rate amplitude \(2\pi A/{\hslash }^{2}=1.4\,nm/meV\) (see Supplementary material part A). The CM off-resonant emission, which results from pure dephasing and phonon scattering26, 27, the enhanced QD emission intensity near resonance (see Supplementary material Fig. S1 for details) and the QD lines co-polarization behavior are accounted for by the simulations.

Figure 4
figure 4

PL spectra of two QDs coupled to the same CM. Comparison of measured (a) and calculated (b) spectra of the coupled 2QDs-cavity system at different sample temperatures, resolved in linear polarization (see Fig. 1d for definition of V and H polarizations). Spectra are normalized by the maximum intensity and \({\omega }_{0}=({\omega }_{{X}_{B}^{-}}+{\omega }_{{X}_{A}})\mathrm{/2}\). The two-level system (TLS) component is indicated.

The variation in the intensities of the different spectral features near resonance is depicted in Fig. 5a,b, which shows the temperature dependence of the (un-normalized) PL spectra as well as the integrated intensities of each line. The intensities of the peaks belonging to QD A and B versus detuning, defined as \(\hslash {\delta }_{j}=\hslash {\omega }_{j}-\hslash {\omega }_{cav}\), trace nearly perfect Lorentzians with FWHM of ~1 meV and ~0.6 meV, respectively. This behavior is well explained by the dependence of the Purcell factor on detuning, which can be approximated by a Lorentzian function

$${F}_{P} \sim \frac{1+2Q{\gamma }_{j}^{d}/{\omega }_{j}}{8{\delta }^{2}/{\kappa }^{2}+2{(1+2Q{\gamma }_{j}^{d}/{\omega }_{j})}^{2}}$$
(1)

for a QD transition broadened by pure dephasing28. The only exception to this Lorentzian trend in Fig. 5b is exhibited by the 2X A line, which can be explained by its conditional dynamics with X A . That is, as the radiative lifetime of the X A is shortened via the Purcell effect, it leads to a depletion of the 2X A state and hence its intensity deviates from the Lorentzian dependence versus detuning. Remarkably, the PL intensities of all excitonic species belonging to the same QD are influenced by the cavity in the same way, implying they experience similar coupling strength with the CM.

Figure 5
figure 5

PL intensity and DOLP detuning dependence. (a) PL spectra (not normalized) of the 2QDs-cavity structure versus temperature. Integrated intensities (b) and degree of linear polarization (DOLP) (c) of the excitonic emission peaks versus detuning with respect to the cavity mode. In (b), the blue (green) solid lines represent Lorentzian fits to the data points of the X and X features of QD A (QD B ). In (c), the solid black line displays the DOLP of the full spectrum, acquired at 40 K high above saturation (P = 5 mW). (d) Comparison of the measured DOLP of the \({X}_{B}^{-}\) and X A transitions with simulated values. In (bd), the detuning is defined as \(\hslash {\delta }_{j}=\hslash {\omega }_{j}-\hslash {\omega }_{cav}\).

Figure 5c shows the detuning dependence of the degree of linear polarization \(DOLP=({I}_{V}-{I}_{H})/({I}_{V}+{I}_{H})\) for all observed peaks. In this case of a strongly polarized CM and a symmetric QD showing otherwise isotropic polarization of emission in the cavity plane, the QD emission becomes co-polarized with the CM for sufficiently small detuning, a consequence of the Purcell effect21. Strikingly, their DOLP follows an s-shaped curve with a maximum value at resonance of ~0.9, corresponding to the DOLP of the CM29. This co-polarization behavior of the QD lines with the CM feature at resonance is a consequence of the Purcell effect and is consistent with our observations for single QDs in L 3 PhC cavities22. The polarization of individual peaks is in excellent agreement with the DOLP of the full spectrum (solid line) acquired at 40 K for high pump powers (P = 5 mW) such that all excitonic features merge into a quasi-continuum. The simulated DOLP of the TLSs transitions are also in good agreement with the experiment (Fig. 5d). The peculiar shape of the DOLP may be due to a Fano-like interference between the emission of the QD and the CM30.

Another special attribute of this coupled 2QDs-cavity system is that the emission intensity of the CM saturates at an excitation power that is about an order of magnitude above that of the excitonic ground states of the two QDs (see Supplemental Fig. SP1). This behavior is disctinct from the phenomenology of single QDs coupled to an L3 cavity22 and could indicate the onset of cooperative emission. Alternatively, this behavior may be explained as the result of CM feeding from higher energy quantum wire states that are spatially located in the vicinity of pyramidal QDs28.

Conclusion

We demonstrated the deterministic coupling of two site-controlled QDs integrated in an L3 PhC cavity. The weak coupling of both QDs to the same CM was revealed through co-polarization and Purcell enhancement of their emission near resonance. These observations were reproduced by a theoretical model that accounts for QD phonon scattering and pure dephasing decoherence mechanisms, from which a QD-cavity coupling strength g = 50 μeV was extracted for both QDs. The present Letter consolidates the potential of site-controlled QDs as a scalable platform for realizing more advanced cavity QED schemes, such as multiple QDs in a cavity31, coupled cavity structures32 and waveguide-coupled distant cavities33.

Methods

Sample Fabrication

The QD-cavity structures were fabricated by first growing arrays of pyramidal InGaAs/GaAs QDs using metallorganic vapor phase epitaxy (MOVPE) on a patterned (111)B GaAs “membrane” wafer34, 35. The membrane wafer consisted of a 1 μm thick sacrificial AlGaAs layer (Al content ~0.7) overgrown with a 265 nm thick GaAs membrane layer, on which triangular arrays of inverted pyramids with 400 nm pitch and 300 nm side length were fabricated using electron beam lithography (EBL) and wet chemical etching36. The grown heterostructure consisted of a 4.3 nm thick GaAs buffer layer followed by a 0.2 nm thick layer of In0.2Ga0.8As resulting in the formation of a single symmetric37, 38 QD at the apex of each pyramidal pit. The QDs were then capped by growing a 2.5 nm thick GaAs layer. All thicknesses correspond to their equivalent on a (100) GaAs planar substrate. The photoluminescence (PL) spectra of the resulting QD ensembles were measured and the emission wavelengths were used in designing PhC modified L3 cavities with resonances matching the QD spectra. The PhC cavities were implemented on the grown wafer using PhC hole patterns with period a = 200 nm and systematic variations in hole radii r using EBL and inductively coupled plasma (ICP) dry etching39, with the help of mutual alignment marks made on the substrate prior to epitaxial growth. The PhC hole patterns were designed so that all QDs were removed at this step, except for two QDs at the center of the cavity. Scanning electron microscope (SEM) inspection of the resulting structures allows us to estimate positioning accuracy of the dots relative to the cavity pattern of better than 50 nm. Note that the separation of the two isolated QDs is 350 nm, designed to place each dot at a lobe of the optical near field pattern of the fundamental cavity mode (see Fig. 1b). Such QD separation excludes possible dipole-dipole interactions for inter-dot coupling. The fabrication process ends by membrane release via wet etching in buffered hydrofluoric acid22, 40.

Optical setup

The PL spectra were acquired using a standard μPL setup. The sample was excited using a 730 nm wavelength Ti-sapphire laser beam, focused on the sample’s surface to a circular spot with a ~1 μm radius using a 50× magnification microscope objective. An excitation power level of P = 1 μW mentioned in the manuscript corresponds to a power density of 0.5 W/cm 2 applied at the sample’s surface. The PL was then collected using the same microscope objective and dispersed by an 80 μeV-resolution spectrometer. A half-wave plate followed by a polarizer was placed in the detection path for the measurements of spectra resolved in linear polarization.

References

  1. Khitrova, G., Gibbs, H. M., Kira, M., Koch, S. W. & Scherer, A. Vacuum Rabi splitting in semiconductors. Nat Phys. 2, 81–90 (2006).

    CAS  Article  Google Scholar 

  2. Lodahl, P., Mahmoodian, S. & Stobbe, S. Interfacing single photons and single quantum dots with photonic nanostructures. Rev. Mod. Phys. 87, 347–400 (2015).

    ADS  MathSciNet  CAS  Article  Google Scholar 

  3. Bermel, P., Rodriguez, A., Johnson, S. G., Joannopoulos, J. D. & Soljačić, M. Single-photon all-optical switching using waveguide-cavity quantum electrodynamics. Phys. Rev. A 74, 043818 (2006).

    ADS  Article  Google Scholar 

  4. Englund, D. et al. Controlling cavity reflectivity with a single quantum dot. Nature 450, 857–861 (2007).

    ADS  CAS  Article  PubMed  Google Scholar 

  5. Bajcsy, M., Majumdar, A., Rundquist, A. & Vučković, J. Photon blockade with a four-level quantum emitter coupled to a photonic-crystal nanocavity. New J. Phys. 15, 025014 (2013).

    ADS  Article  Google Scholar 

  6. Cirac, J. I., Zoller, P., Kimble, H. J. & Mabuchi, H. Quantum State Transfer and Entanglement Distribution among Distant Nodes in a Quantum Network. Phys. Rev. Lett. 78, 3221–3224 (1997).

    ADS  CAS  Article  Google Scholar 

  7. Imamoğlu, A. et al. Quantum Information Processing Using Quantum Dot Spins and Cavity QED. Phys. Rev. Lett. 83, 4204–4207 (1999).

    ADS  Article  Google Scholar 

  8. Collins, M. J. et al. Integrated spatial multiplexing of heralded single-photon sources. Nat. Commun. 4, 2582 (2013).

    CAS  Article  PubMed  PubMed Central  Google Scholar 

  9. Reitzenstein, S. et al. Coherent photonic coupling of semiconductor quantum dots. Opt. Lett., OL 31, 1738–1740 (2006).

    ADS  CAS  Article  Google Scholar 

  10. Dousse, A. et al. Controlled Light-Matter Coupling for a Single Quantum Dot Embedded in a Pillar Microcavity Using Far-Field Optical Lithography. Phys. Rev. Lett. 101, 267404 (2008).

    ADS  CAS  Article  PubMed  Google Scholar 

  11. Reitzenstein, S. et al. Polarization-dependent strong coupling in elliptical high-Q micropillar cavities. Phys. Rev. B 82, 235313 (2010).

    ADS  Article  Google Scholar 

  12. Srinivasan, K. & Painter, O. Linear and nonlinear optical spectroscopy of a strongly coupled microdisk–quantum dot system. Nature 450, 862–865 (2007).

    ADS  CAS  Article  PubMed  Google Scholar 

  13. Gallardo, E. et al. Optical coupling of two distant InAs/GaAs quantum dots by a photonic-crystal microcavity. Phys. Rev. B 81, 193301 (2010).

    ADS  Article  Google Scholar 

  14. Laucht, A. et al. Mutual coupling of two semiconductor quantum dots via an optical nanocavity. Phys. Rev. B 82, 075305 (2010).

    ADS  Article  Google Scholar 

  15. Kim, H., Sridharan, D., Shen, T. C., Solomon, G. S. & Waks, E. Strong coupling between two quantum dots and a photonic crystal cavity using magnetic field tuning. Opt. Express, OE 19, 2589–2598 (2011).

    ADS  CAS  Article  Google Scholar 

  16. Majumdar, A., Bajcsy, M., Rundquist, A., Kim, E. & Vučković, J. Phonon-mediated coupling between quantum dots through an off-resonant microcavity. Phys. Rev. B 85, 195301 (2012).

    ADS  Article  Google Scholar 

  17. Maragkou, M. et al. Bichromatic dressing of a quantum dot detected by a remote second quantum dot. Phys. Rev. B 88, 075309 (2013).

    ADS  Article  Google Scholar 

  18. Thon, S. M. et al. Strong coupling through optical positioning of a quantum dot in a photonic crystal cavity. Appl. Phys. Lett. 94, 111115 (2009).

    ADS  Article  Google Scholar 

  19. Gschrey, M. et al. Highly indistinguishable photons from deterministic quantum-dot microlenses utilizing three-dimensional in situ electron-beam lithography. Nat. Commun. 6, 7662 (2015).

    CAS  Article  PubMed  PubMed Central  Google Scholar 

  20. Sapienza, L., Davanço, M., Badolato, A. & Srinivasan, K. Nanoscale optical positioning of single quantum dots for bright and pure single-photon emission. Nat. Commun. 6, 7833 (2015).

    ADS  CAS  Article  PubMed  PubMed Central  Google Scholar 

  21. Jarlov, C. et al. Effect of Pure Dephasing and Phonon Scattering on the Coupling of Semiconductor Quantum Dots to Optical Cavities. Phys. Rev. Lett. 117, 076801 (2016).

    ADS  CAS  Article  PubMed  Google Scholar 

  22. Calic, M. et al. Phonon-Mediated Coupling of InGaAs/GaAs Quantum-Dot Excitons to Photonic Crystal Cavities. Phys. Rev. Lett. 106, 227402 (2011).

    ADS  CAS  Article  PubMed  Google Scholar 

  23. Calic, M. Cavity Quantum Electrodynamics with Site-Controlled Pyramidal Quantum Dots in Photonic Crystal Cavities. Ph.D. thesis, Ecole Polytechnique Fédérale de Lausanne (2013).

  24. Jarlov, C. et al. Bound and anti-bound biexciton in site-controlled pyramidal GaInAs/GaAs quantum dots. Appl. Phys. Lett. 101, 191101 (2012).

    ADS  Article  Google Scholar 

  25. Gallardo, E. et al. Emission polarization control in semiconductor quantum dots coupled to a photonic crystal microcavity. Opt. Express, OE 18, 13301–13308 (2010).

    ADS  CAS  Article  Google Scholar 

  26. Auffèves, A., Gérard, J.-M. & Poizat, J.-P. Pure emitter dephasing: A resource for advanced solid-state single-photon sources. Phys. Rev. A 79, 053838 (2009).

    ADS  Article  Google Scholar 

  27. Tarel, G. & Savona, V. Linear spectrum of a quantum dot coupled to a nanocavity. Phys. Rev. B 81, 075305 (2010).

    ADS  Article  Google Scholar 

  28. Jarlov, C. et al. Exciton dynamics in a site-controlled quantum dot coupled to a photonic crystal cavity. Appl. Phys. Lett. 107, 191101 (2015).

    ADS  Article  Google Scholar 

  29. Chalcraft, A. R. A. et al. Mode structure of the L3 photonic crystal cavity. Appl. Phys. Lett. 90, 241117 (2007).

    ADS  Article  Google Scholar 

  30. Yamaguchi, M., Asano, T., Fujita, M. & Noda, S. Theoretical analysis of light emission from a coupled system of a photonic nanocavity and a quantum dot. Phys. Status Solidi (c) 5, 2828–2830 (2008).

    ADS  CAS  Article  Google Scholar 

  31. Surrente, A. et al. Ordered systems of site-controlled pyramidal quantum dots incorporated in photonic crystal cavities. Nanotechnology 22, 465203 (2011).

    CAS  Article  PubMed  Google Scholar 

  32. Rigal, B. et al. Site-controlled quantum dots coupled to a photonic crystal molecule. Appl. Phys. Lett. 107, 141103 (2015).

    ADS  Article  Google Scholar 

  33. Englund, D., Faraon, A., Zhang, B., Yamamoto, Y. & Vučković, J. Generation and transfer of single photons on a photonic crystal chip. Optics Express 15, 5550 (2007).

    ADS  Article  PubMed  Google Scholar 

  34. Gallo, P. et al. Integration of site-controlled pyramidal quantum dots and photonic crystal membrane cavities. Appl. Phys. Lett. 92, 263101 (2008).

    ADS  Article  Google Scholar 

  35. Rigal, B. et al. Site-controlled InGaAs/GaAs pyramidal quantum dots grown by MOVPE on patterned substrates using triethylgallium. J. Cryst. Growth 414, 187–191 (2015).

    ADS  CAS  Article  Google Scholar 

  36. Surrente, A. et al. Dense arrays of ordered pyramidal quantum dots with narrow linewidth photoluminescence spectra. Nanotechnology 20, 415205 (2009).

    CAS  Article  PubMed  Google Scholar 

  37. Dupertuis, M. A. et al. Symmetries and the Polarized Optical Spectra of Exciton Complexes in Quantum Dots. Phys. Rev. Lett. 107, 127403 (2011).

    ADS  CAS  Article  PubMed  Google Scholar 

  38. Karlsson, K. F. et al. Optical polarization anisotropy and hole states in pyramidal quantum dots. Appl. Phys. Lett. 89, 251113 (2006).

    ADS  Article  Google Scholar 

  39. Atlasov, K. A., Gallo, P., Rudra, A., Dwir, B. & Kapon, E. Effect of sidewall passivation in BCl 3/N 2 inductively coupled plasma etching of two-dimensional gaas photonic crystals. J. Vac. Sci. Technol., B 27, L21–L24 (2009).

    CAS  Article  Google Scholar 

  40. Felici, M. et al. Site-Controlled InGaAs Quantum Dots with Tunable Emission Energy. Small 5, 938–943 (2009).

    ADS  CAS  Article  PubMed  Google Scholar 

Download references

Acknowledgements

This work was supported by the Swiss National Science Foundation. We thank Giorgio Biasiol of TASC, Trieste, Italy, for the growth of the (111)B GaAs/AlGaAs membrane wafers employed.

Author information

Authors and Affiliations

Authors

Contributions

M.C., B.D. and E.K. designed the samples, M.C., B.D., P.G. and A.R. fabricated the samples, C.J. developed the theoretical model, M.C. did optical measurements, M.C., C.J. and E.K. interpreted the results and wrote the article, E.K. supervised the work.

Corresponding author

Correspondence to E. Kapon.

Ethics declarations

Competing Interests

The authors declare that they have no competing interests.

Additional information

Publisher's note: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Electronic supplementary material

Rights and permissions

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Calic, M., Jarlov, C., Gallo, P. et al. Deterministic radiative coupling of two semiconductor quantum dots to the optical mode of a photonic crystal nanocavity. Sci Rep 7, 4100 (2017). https://doi.org/10.1038/s41598-017-03989-y

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1038/s41598-017-03989-y

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing