46
2 Entering a Two-Dimensional Materials World
26. K.F. Mak, K. He, C. Lee, G.H. Lee, J. Hone, T.F. Heinz, J. Shan, Tightly bound trions in
monolayer MoS 2 . Nat. Mater. 12, 207–211 (2013)
27. J.S. Ross, S. Wu, H. Yu, N.J. Ghimire, A.M. Jones, G. Aivazian, J. Yan, D.G. Mandrus,
D. Xiao, W. Yao, X. Xu, Electrical control of neutral and charged excitons in a monolayer
semiconductor. Nat. Commun. 4, 1–6 (2013)
28. Y. You, X.-X. Zhang, T.C. Berkelbach, M.S. Hybertsen, D.R. Reichman, T.F. Heinz, Observation of biexcitons in monolayer WSe 2 . Nat. Phys. 11, 477–481 (2015)
29. X.-X. Zhang, Y. You, S.Y.F. Zhao, T.F. Heinz, Experimental evidence for dark excitons in
monolayer WSe 2 . Phys. Rev. Lett. 115, 257403 (2015)
30. K.F. Mak, K. He, J. Shan, T.F. Heinz, Control of valley polarization in monolayer MoS 2 by
optical helicity. Nat. Nanotechnol. 7, 494–498 (2012)
31. T. Cao, G. Wang, W. Han, H. Ye, C. Zhu, J. Shi, Q. Niu, P. Tan, E. Wang, B. Liu, J. Feng,
Valley-selective circular dichroism of monolayer molybdenum disulphide. Nat. Commun. 3,
1–5 (2012)
32. A.M. Jones, H. Yu, N.J. Ghimire, S. Wu, G. Aivazian, J.S. Ross, B. Zhao, J. Yan, D.G. Mandrus,
D. Xiao, W. Yao, X. Xu, Optical generation of excitonic valley coherence in monolayer WSe 2 .
Nat. Nanotechnol. 8, 634–638 (2013)
33. L.M. Schneider, S.S. Esdaille, D.A. Rhodes, K. Barmak, J.C. Hone, A. Rahimi-Iman, Optical
dispersion of valley-hybridised coherent excitons with momentum-dependent valley polarisation in monolayer semiconductor. 2D Mater. 8, 015009 (2020)
34. C. Poellmann, P. Steinleitner, U. Leierseder, P. Nagler, G. Plechinger, M. Porer, R. Bratschitsch, C. Schüller, T. Korn, R. Huber, Resonant internal quantum transitions and femtosecond radiative decay of excitons in monolayer WSe 2 . Nat. Mater. 14, 889–893 (2015)
35. T. Jakubczyk, V. Delmonte, M. Koperski, K. Nogajewski, C. Faugeras, W. Langbein, M.
Potemski, J. Kasprzak, Radiatively limited dephasing and exciton dynamics in MoS 2 monolayers revealed with four-wave mixing microscopy. Nano Lett. 16, 5333–5339 (2016)
36. C. Ruppert, A. Chernikov, H.M. Hill, A.F. Rigosi, T.F. Heinz, The role of electronic and
phononic excitation in the optical response of monolayer WS 2 after ultrafast excitation. Nano
Lett. 17, 644–651 (2017)
37. P. Steinleitner, P. Merkl, P. Nagler, J. Mornhinweg, C. Schüller, T. Korn, A. Chernikov, R.
Huber, Direct observation of ultrafast exciton formation in a monolayer of WSe 2 . Nano Lett.
17, 1455–1460 (2017)
38. L.M. Schneider, S. Lippert, J. Kuhnert, D. Renaud, K.N. Kang, O. Ajayi, M.-U. Halbich,
O.M. Abdulmunem, X. Lin, K. Hassoon, S. Edalati-Boostan, Y.D. Kim, W. Heimbrodt, E.H.
Yang, J.C. Hone, A. Rahimi-Iman, The impact of the substrate material on the optical properties of 2D WSe 2 monolayers. Semiconductors 52, 565–571 (2018). https://doi.org/10.1134/
S1063782618050275
39. L.M. Schneider, J. Kuhnert, S. Lippert, D. Renaud, W. Heimbrodt, O. Ajayi, Y.D. Kim,
J.C. Hone, K.N. Kang, E.-H. Yang, A. Rahimi-Iman, Density-dependent excitonic properties
and dynamics in 2d heterostructures consisting of boron nitride and monolayer or few-layer
tungsten diselenide, in Micro- and Nanotechnology Sensors, Systems, and Applications X,
vol. 10639, p. 106390V, International Society for Optics and Photonics (2018)
40. L.M. Schneider, S. Lippert, J. Kuhnert, O. Ajayi, D. Renaud, S. Firoozabadi, Q. Ngo, R. Guo,
Y.D. Kim, W. Heimbrodt, J.C. Hone, A. Rahimi-Iman, The influence of the environment
on monolayer tungsten diselenide photoluminescence. Nano-Struct. Nano-Objects 15, 84–97
(2018), online 2017. https://doi.org/10.1016/j.nanoso.2017.08.009
41. J. Fu, J.M.R. Cruz, F. Qu, Valley dynamics of different trion species in monolayer WSe 2 .
Appl. Phys. Lett. 115, 082101 (2019)
42. J. Zipfel, M. Kulig, R. Perea-Causín, S. Brem, J.D. Ziegler, R. Rosati, T. Taniguchi, K. Watanabe, M.M. Glazov, E. Malic, A. Chernikov, Exciton diffusion in monolayer semiconductors
with suppressed disorder. Phys. Rev. B 101(11), 1–20 (2020)
43. M. Massicotte, F. Vialla, P. Schmidt, M.B. Lundeberg, S. Latini, S. Haastrup, M. Danovich, D.
Davydovskaya, K. Watanabe, T. Taniguchi, V.I. Falko, K.S. Thygesen, T.G. Pedersen, F.H.L.
Koppens, Dissociation of two-dimensional excitons in monolayer WSe 2 . Nat. Commun. 9,
1633 (2018)
2 Entering a Two-Dimensional Materials World
26. K.F. Mak, K. He, C. Lee, G.H. Lee, J. Hone, T.F. Heinz, J. Shan, Tightly bound trions in
monolayer MoS 2 . Nat. Mater. 12, 207–211 (2013)
27. J.S. Ross, S. Wu, H. Yu, N.J. Ghimire, A.M. Jones, G. Aivazian, J. Yan, D.G. Mandrus,
D. Xiao, W. Yao, X. Xu, Electrical control of neutral and charged excitons in a monolayer
semiconductor. Nat. Commun. 4, 1–6 (2013)
28. Y. You, X.-X. Zhang, T.C. Berkelbach, M.S. Hybertsen, D.R. Reichman, T.F. Heinz, Observation of biexcitons in monolayer WSe 2 . Nat. Phys. 11, 477–481 (2015)
29. X.-X. Zhang, Y. You, S.Y.F. Zhao, T.F. Heinz, Experimental evidence for dark excitons in
monolayer WSe 2 . Phys. Rev. Lett. 115, 257403 (2015)
30. K.F. Mak, K. He, J. Shan, T.F. Heinz, Control of valley polarization in monolayer MoS 2 by
optical helicity. Nat. Nanotechnol. 7, 494–498 (2012)
31. T. Cao, G. Wang, W. Han, H. Ye, C. Zhu, J. Shi, Q. Niu, P. Tan, E. Wang, B. Liu, J. Feng,
Valley-selective circular dichroism of monolayer molybdenum disulphide. Nat. Commun. 3,
1–5 (2012)
32. A.M. Jones, H. Yu, N.J. Ghimire, S. Wu, G. Aivazian, J.S. Ross, B. Zhao, J. Yan, D.G. Mandrus,
D. Xiao, W. Yao, X. Xu, Optical generation of excitonic valley coherence in monolayer WSe 2 .
Nat. Nanotechnol. 8, 634–638 (2013)
33. L.M. Schneider, S.S. Esdaille, D.A. Rhodes, K. Barmak, J.C. Hone, A. Rahimi-Iman, Optical
dispersion of valley-hybridised coherent excitons with momentum-dependent valley polarisation in monolayer semiconductor. 2D Mater. 8, 015009 (2020)
34. C. Poellmann, P. Steinleitner, U. Leierseder, P. Nagler, G. Plechinger, M. Porer, R. Bratschitsch, C. Schüller, T. Korn, R. Huber, Resonant internal quantum transitions and femtosecond radiative decay of excitons in monolayer WSe 2 . Nat. Mater. 14, 889–893 (2015)
35. T. Jakubczyk, V. Delmonte, M. Koperski, K. Nogajewski, C. Faugeras, W. Langbein, M.
Potemski, J. Kasprzak, Radiatively limited dephasing and exciton dynamics in MoS 2 monolayers revealed with four-wave mixing microscopy. Nano Lett. 16, 5333–5339 (2016)
36. C. Ruppert, A. Chernikov, H.M. Hill, A.F. Rigosi, T.F. Heinz, The role of electronic and
phononic excitation in the optical response of monolayer WS 2 after ultrafast excitation. Nano
Lett. 17, 644–651 (2017)
37. P. Steinleitner, P. Merkl, P. Nagler, J. Mornhinweg, C. Schüller, T. Korn, A. Chernikov, R.
Huber, Direct observation of ultrafast exciton formation in a monolayer of WSe 2 . Nano Lett.
17, 1455–1460 (2017)
38. L.M. Schneider, S. Lippert, J. Kuhnert, D. Renaud, K.N. Kang, O. Ajayi, M.-U. Halbich,
O.M. Abdulmunem, X. Lin, K. Hassoon, S. Edalati-Boostan, Y.D. Kim, W. Heimbrodt, E.H.
Yang, J.C. Hone, A. Rahimi-Iman, The impact of the substrate material on the optical properties of 2D WSe 2 monolayers. Semiconductors 52, 565–571 (2018). https://doi.org/10.1134/
S1063782618050275
39. L.M. Schneider, J. Kuhnert, S. Lippert, D. Renaud, W. Heimbrodt, O. Ajayi, Y.D. Kim,
J.C. Hone, K.N. Kang, E.-H. Yang, A. Rahimi-Iman, Density-dependent excitonic properties
and dynamics in 2d heterostructures consisting of boron nitride and monolayer or few-layer
tungsten diselenide, in Micro- and Nanotechnology Sensors, Systems, and Applications X,
vol. 10639, p. 106390V, International Society for Optics and Photonics (2018)
40. L.M. Schneider, S. Lippert, J. Kuhnert, O. Ajayi, D. Renaud, S. Firoozabadi, Q. Ngo, R. Guo,
Y.D. Kim, W. Heimbrodt, J.C. Hone, A. Rahimi-Iman, The influence of the environment
on monolayer tungsten diselenide photoluminescence. Nano-Struct. Nano-Objects 15, 84–97
(2018), online 2017. https://doi.org/10.1016/j.nanoso.2017.08.009
41. J. Fu, J.M.R. Cruz, F. Qu, Valley dynamics of different trion species in monolayer WSe 2 .
Appl. Phys. Lett. 115, 082101 (2019)
42. J. Zipfel, M. Kulig, R. Perea-Causín, S. Brem, J.D. Ziegler, R. Rosati, T. Taniguchi, K. Watanabe, M.M. Glazov, E. Malic, A. Chernikov, Exciton diffusion in monolayer semiconductors
with suppressed disorder. Phys. Rev. B 101(11), 1–20 (2020)
43. M. Massicotte, F. Vialla, P. Schmidt, M.B. Lundeberg, S. Latini, S. Haastrup, M. Danovich, D.
Davydovskaya, K. Watanabe, T. Taniguchi, V.I. Falko, K.S. Thygesen, T.G. Pedersen, F.H.L.
Koppens, Dissociation of two-dimensional excitons in monolayer WSe 2 . Nat. Commun. 9,
1633 (2018)