Group Publications



Frequency down-conversion of terahertz waves at optically induced temporal boundaries in GaAs waveguides

Nanophotonics (2024)

K. Takano, S. Uchiyama, S. Nagase, Y. Tsuchimoto, T. Nakanishi, Y. Nakata, J. Pérez-Urquizo, J. Madéo, K. M. Dani and F. Miyamaru


Time-resolved photoemission electron microscopy of semiconductor interfaces

Progress in Surface Science, 100745 (2024)

S. Kosar, K. M. Dani


Attenuation management in terahertz frequency conversion with temporal boundary using a metallic structure

Phys. Rev. Applied 35 (21), 044044 (2024)

F. Miyamaru, M. Amaki, K. Takano, J. Pérez-Urquizo, J. Madéo, K. M. Dani, Y. Nakata and T. Nakanishi




Through the lens of a momentum microscope: viewing light-induced quantum phenomena in two-dimensional materials

Adv. Mater. 35 (27), 2204120 (2023)

O. Karni, I. Esin, K.M. Dani


Transition from diffusive to superdiffusive transport in carbon nanotube networks via nematic order control

Nano Letters (2023)

M. Wais, F.R.G. Bagsican, N. Komatsu, W. Gao, K. Serita, H. Murakami, K. Held, I. Kawayama, J. Kono, M. Battiato and M. Tonouchi.


Phase composition, microstructure, and optical characteristics of spin-coated La-TiO2 and Fe-TiO2

physica status solidi (a) (2023)

A. Liboon Jr, S. R. Cabo, R. B. Unabia, F. R. G. Bagsican and R. T. Candidato Jr




Harmonic generation in confinement

Nat. Phys. (2022)

J. Madéo, and K. M. Dani


Optimum excitation wavelength and photon energy threshold for spintronic terahertz emission from Fe/Pt bilayer

iScience 25, 7, 104615 (2022)

V. K. Mag-usara, M. C. Escaño, C. E. Petoukhoff, G. Torosyan, L. Scheuer, J. Madéo, J. Afalla, M. L. Talara, J. E. Muldera, H. Kitahara, D. R. Bacon, M. Nakajima, K. M. Dani, E. T. Papaioannou, R. Beigang and M. Tani,


Local nanoscale phase impurities are degradation sites in halide perovskites

Nature 607, 294-300 (2022)

S. Macpherson, T. A. S. Doherty, A. J. Winchester, S. Kosar, D. N. Johnstone, Y. Chiang, K. Galkowski, M. Anaya, K. Frohna, A. N. Iqbal, S. Nagane, B. Roose, Z. Andaji-Garmaroudi, K. W. P. Orr, J. E. Parker, P. A. Midgley, K. M. Dani and S. D. Stranks


Dominating interlayer resonant energy transfer in type-II 2D heterostructure

ACS Nano 16, 3, 3861–3869 (2022)

A. Karmakar, A. Al-Mahboob, C. E. Petoukhoff, O. Kravchyna, N. S. Chan, T. Taniguchi, K. Watanabe, and K. M. Dani


Structure of the moiré exciton captured by imaging its electron and hole

Nature 603, 247-252 (2022)

O. Karni, E. Barré, V. Pareek, J. D. Georgaras, M. K. L. Man, C. Sahoo, D. R. Bacon, X. Zhu, H. B. Ribeiro, A. L. O’Beirne, J. Hu, A. Al-Mahboob, M. M. M. Abdelrasoul, N. S. Chan, A. Karmakar, A. J. Winchester, B. Kim, K. Watanabe, T. Taniguchi, K. Barmak, J. Madéo, F. H. da Jornada, T. F. Heinz and K. M. Dani

These authors contributed equally to this work.


An on-demand drug delivery system for control of epileptiform seizures

Pharmaceutics 14, 468 (2022)

T. Nakano, S. B. Rizwan, D. M. A. Myint, J. Gray, S. M. Mackay, P. Harris, C. G. Perk, B. I. Hyland, R. Empson, E. W. Tan, K. M. Dani, J. N. Reynolds, J. R. Wickens


Nanoscale chemical heterogeneity dominates the optoelectronic response of alloyed perovskite solar cells

Nat. Nanotechnol. 17, 190-196 (2022)

K. Frohna, M. Anaya, S. Macpherson, J. Sung, T. A. S. Doherty, Y. H. Chiang, A. J. Winchester, K. W. P. Orr, J. E. Parker, P. D. Quinn, K. M. Dani, A. Rao and S. D. Stranks




Unraveling the varied nature and roles of defects in hybrid halide perovskites with time-resolved photoemission electron microscopy

Energy Environ. Sci. 14, 6320-6328 (2021)

S. Kosar, A. J. Winchester, T. A. S. Doherty, S. Macpherson, C. E. Petoukhoff, K. Frohna, M. Anaya, N. S. Chan, J. Madéo, M. K. L. Man, S. D. Stranks and K. M. Dani


Visualizing superconductivity in a doped Weyl semimetal with broken inversion symmetry

Phys. Rev. B 104 (11), 115102 (2021)

Z. Wang, J. Olivares, H. Namiki, V. Pareek, K. M. Dani, T. Sasagawa, V. Madhavan and Y. Okada


Ultrafast frequency-shift dynamics at temporal boundary induced by structural-dispersion switching of waveguides

Phys. Rev. Lett. 127 (5), 053902 (2021)

F. Miyamaru, C. Mizuo, T. Nakanishi, Y. Nakata, K. Hasebe, S. Nagase, Y. Matsubara, Y. Goto, J. Pérez-Urquizo, J. Madéo, and K. M. Dani


The 2021 ultrafast spectroscopic probes of condensed matter roadmap

J. Phys.: Condens. Matter 33 353001 (2021)

J. Lloyd-Hughes, P. M. Oppeneer, T. Pereira dos Santos, A. Schleife, S. Meng, M. A. Sentef, M. Ruggenthaler, A. Rubio, I. Radu, M. Murnane, X. Shi, H. Kapteyn, B. Stadtmüller, K. M. Dani, F. H. da Jornada, E. Prinz, M. Aeschlimann, R. L. Milot, M. Burdanova, J. Boland, T. Cocker and F. Hegmann


High field single- to few-cycle THz generation with lithium niobate

Photonics 8 (6), 183 (2021)

X. Zhu, D. R. Bacon, J. Madéo and K. M. Dani


Photoconductive emitters for pulsed terahertz generation

Journal of Optics 23 (6), 064001 (2021)

D. R. Bacon, J. Madéo and K. M. Dani


Experimental measurement of the intrinsic excitonic wave function

Science Advances 7 (17), eabg0192 (2021)

M. K. L. Man, J. Madéo, C. Sahoo, K. Xie, M. Campbell, V. Pareek, A. Karmakar, E L. Wong, A. Al-Mahboob, N. S. Chan, D. R. Bacon, X. Zhu, M. M. M. Abdelrasoul, X. Li, T. F. Heinz, F. H. da Jornada, T. Cao, and K. M. Dani

These authors contributed equally to this work.

Featured: Scientists capture first ever image of an electron's orbit within an exciton

                 Phys.Org April 21 (2021) OIST


Visualization of two-dimensional transition dipole moment texture in momentum space using high-harmonic generation spectroscopy

Physical Review B 103, L161406 (2021)

K. Uchida, V. Pareek, K. Nagai, K. M. Dani, and K. Tanaka


Monolithic patch-antenna THz lasers with extremely low beam divergence and polarization control

ACS Photonics 8 (2), 412 (2021)

J. Pérez-Urquizo, Y. Todorov, L. Li, A. G. Davies, E. H. Linfield, C. Sirtori, J. Madéo, K. M. Dani




Directly visualizing the momentum-forbidden dark excitons and their dynamics in atomically thin semiconductors

Science 370 (6521), 1199 (2020) (Reprint)

J. Madéo, M. K. L. Man, C. Sahoo, M. Campbell, V. Pareek, E L. Wong, A. Al-Mahboob, N. S. Chan, A. Karmakar, B. M. K. Mariserla, X. Li, T. F. Heinz, T. Cao, and K. M. Dani

These authors contributed equally to this work.

Perspective: Probing the dark side of the exciton

Science 370 (6521), 1166 (2020) M. X. Na, Z. Ye

Featured: Photoelectrons shine a light on dark excitons

Phys. Today 74 16–18 (2021) C. Middleton


Strong plasmon-exciton coupling in Ag nanoparticle - conjugated polymer core-shell hybrid nanostructures

Polymers 12 (9), 2141 (2020)

C. E. Petoukhoff, K. M. Dani, and D. M. O'Carroll


Photoconductive arrays on insulating substrates for high-field terahertz generation

Optics Express 28 (12), 17219 (2020)

D. R. Bacon, T. B. Gill, M. Rosamond, A. D. Burnett, A. Dunn, L. Li, E. H. Linfield, A. G. Davies, P. Dean, and J. R. Freeman


Examining the surface phase diagram of IrTe2 with photoemission

Phys. Rev. B 101, 235120 (2020)

M. Rumo, C. W. Nicholson, A. Pulkkinen, B. Hildebrand, G. Kremer, B. Salzmann, M.-L. Mottas, K. Y. Ma, E L. Wong, M. K. L. Man, K. M. Dani, B. Barbiellini, M. Muntwiler, T. Jaouen, F. O. von Rohr, and C. Monney 


Performance-limiting nanoscale trap clusters at grain junctions in halide perovskites

Nature 580, 360 (2020)

T. A. S. Doherty, A. J. Winchester, S. Macpherson, D. N. Johnstone, V. Pareek, E. M. Tennyson, S. Kosar, F. U. Kosasih, M. Anaya, M. Abdi-Jalebi, Z. Andaji-Garmaroudi, E L. Wong, J. Madéo, Y.-H. Chiang, J.-S. Park, Y.-K. Jung, C. E. Petoukhoff, G. Divitini, M. K. L. Man, C. Ducati, A. Walsh, P. A. Midgley, K. M. Dani, and S. D. Stranks  

These authors contributed equally to this work. 

Co-corresponding authors.


"Investigation of nanoscale energy transport with time-resolved photoemission electron microscopy"

Nanoscale Energy Transport, edited by B. Liao (IOP Publishing Ltd, 2020), pp.10-1 - 10-33 [Book Chapter]

R. Wong, M. K. L. Man, and K. M. Dani


Ultrafast control of the dimensionality of exciton-exciton annihilation in atomically thin black phosphorus

Phys. Rev. Lett. 124, 057403 (2020)

V. Pareek, J. Madéo, and K. M. Dani




Improving signal and photobleaching characteristics of temporal focusing microscopy with the increase in pulse repetition rate

Methods Protoc. 2, 65 (2019)

V. Lisicovas, B. M. K. Mariserla, C. Sahoo, R. T. Harding, M. K. L. Man, E L. Wong, J. Madéo, and K. M. Dani


Charge transfer dynamics in conjugated polymer/MoS2 organic/2D heterojunctions

Mol. Syst. Des. Eng. 4, 929 (2019)

C. E. Petoukhoff, S. Kosar, M. Goto, I. Bozkurt, M. Chhowalla, and K. M. Dani




Ultrafast dynamics and subwavelength periodic structure formation following irradiation of GaAs with femtosecond laser pulses

Phys. Rev. B 98, 224103 (2018)

A. Margiolakis, G. D. Tsibidis, K. M. Dani, and G. P. Tsironis


Directly photoexcited Dirac and Weyl fermions in ZrSiS and NbAs

Appl. Phys. Lett. 113, 221906 (2018)

C. P. Weber, L. M. Schoop, S. S. P. Parkin, R. C. Newby, A. Nateprov, B. Lotsch, B. M. K. Mariserla, J. M. Kim, K. M. Dani, H. A. Bechtel, E. Arushanov, and M. Ali


Using coherent phonons for ultrafast control of the Dirac node of SrMnSb2

Phys. Rev. B 98, 155115 (2018)

C. P. Weber, M. G. Masten, T. C. Ogloza, B. S. Berggren, M. K. L. Man, K. M. Dani, J. Liu, Z. Mao, D. D. Klug, A. A. Adeleke, and Y. Yao


Pulling apart photoexcited electrons by photoinducing an in-plane surface electric field

Science Advances 4, eaat9722 (2018)

E L. Wong, A. J. Winchester, V. Pareek, J. Madéo, M. K. L. Man, and K. M. Dani


Terahertz photoconductivity and photocarrier dynamics in few-layer hBN/WS2 van der Waals heterostructure laminates

Semicond. Sci. Tech. 33, 084001 (2018)

M. B. M. Krishna, J. Madéo, J. P. Urquizo, X. Zhu, S. Vinod, C. S. Tiwary, P. M. Ajayan, and K. M. Dani


Symmetry and optical selection rules in graphene quantum dots

Phys. Rev. B 97, 115404 (2018)

R. Pohle, E. G. Kavousanaki, K. M. Dani, and N. Shannon


High-temperature terahertz optical diode effect without magnetic order in polar FeZnMo3O8

Phys. Rev. Lett. 120, 037601 (2018)

S. Yu, B. Gao, J. W. Kim, S.-W. Cheong, M. K. L. Man, J. Madéo, K. M. Dani, and D. Talbayev




Similar ultrafast dynamics of several dissimilar Dirac and Weyl semimetals

J. Appl. Phys. 122, 223102 (2017)

C. P. Weber, B. S. Berggren, M. G. Masten, T. C. Ogloza, S. Deckoff-Jones, J. Madéo, M. K. L. Man, K. M. Dani, L. Zhao, G. Chen, J. Liu, Z. Mao, L. M. Schoop, B. V. Lotsch, S. S. P. Parkin, and M. Ali


Terahertz-frequency magnetoelectric effect in Ni-doped CaBaCo4O7

Phys. Rev. B 96, 094421 (2017)

S. Yu, C. Dhanasekhar, V. Adyam, S. Deckoff-Jones, M. K. L. Man, J. Madéo, E L. Wong, T. Harada, M. B. M. Krishna, K. M. Dani, and D. Talbayev


Engineering the losses and beam divergence in arrays of patch antenna microcavities for terahertz sources

J. Infrared Milli. Terahz. Waves 38, 1321 (2017)

J. Madéo, J. Pérez-Urquizo, Y. Todorov, C. Sirtori, and K. M. Dani


Commentary: Pursuing science across nationalities and disciplines

Physics Today 70, 10 (2017)

K. M. Dani


Obtaining cross-sections of paint layers in cultural artifacts using femtosecond pulsed lasers

Materials 10, 107 (2017)

T. Harada, S. Spence, A. Margiolakis, S. Deckoff-Jones, R. Ploeger, A. N. Shugar, J. F. Hamm, K. M. Dani and A. R. Dani

These authors contributed equally to this work.


Imaging the motion of electrons across semiconductor heterojunctions

Nat. Nanotechnol. 12, 36 (2017)

M. K. L. Man, A. Margiolakis, S. Deckoff-Jones, T. Harada, E L. Wong, M. B. M. Krishna, J. Madéo, A. Winchester, S. Lei, R. Vajtai, P. M. Ajayan and K. M. Dani

News & Views: Photovoltaics in action

Nat. Nanotechnol. 12, 3 (2017) Hrvoje Petek




Jahn-Teller-induced femtosecond electronic depolarization dynamics of the nitrogen-vacancy defect in diamond

Nat. Commun. 7, 13510 (2016)

R. Ulbricht, S. Dong, I. Y. Chang, B. M. K. Mariserla, K. M. Dani, K. Hyeon-Deuk, and Z. H. Loh


Ultrafast charge transfer and enhanced absorption in MoS2 - organic van der Waals heterojunctions using plasmonic metasurfaces

ACS Nano 10, 9899 (2016)

C. E. Petoukhoff, M. B. M. Krishna, D. Voiry, I. Bozkurt, S. Deckoff-Jones, M. Chhowalla, D. M. O'Carroll, and K. M. Dani


Interfacing with neural activity via femtosecond laser stimulation of drug encapsulating liposomal nanostructures

eNeuro 3, e0107 (2016)

T. Nakano, S. M. Mackay, E. W. Tan, K. M. Dani, and J. Wickens


Patch antenna microcavity terahertz sources with enhanced emission

Appl. Phys. Lett. 109, 141103 (2016)

J. Madéo, Y. Todorov, A. Gilman, G. Frucci, L. H. Li, A. G. Davies, E. H. Linfield, C. Sirtori, and K. M. Dani


Observing the interplay between surface and bulk optical nonlinearities in thin van der Waals crystals

Sci. Rep. 6, 22620 (2016)

S. Deckoff-Jones, J. Zhang, C. E. Petoukhoff, M. K. L. Man, S. Lei, R. Vajtai, P. M. Ajayan, D. Talbayev, J. Madéo, and K. M. Dani


Protecting the properties of monolayer MoS2 on silicon based substrates with an atomically thin buffer

Sci. Rep. 6, 20890 (2016)

M. K. L. Man, S. Deckoff-Jones, A. Winchester, G. Shi, G. Gupta, A. D. Mohite, S. Kar, E. Kioupakis, S. Talapatra, and K. M. Dani


Oxidation of planar and plasmonic Ag surfaces by exposure to O2/Ar plasma for organic optoelectronic applications

MRS Advances 1, 943 (2016)

C. E. Petoukhoff, C. Antonick, B. M. K. Mariserla, K. M. Dani, and D. M. O'Carroll




Chemical vapor deposition synthesized atomically-thin Molybdenum Disulfide with optoelectronic-graded crystalline quality

ACS Nano 9, 8822 (2015)

I. Bilgin, F. Kiu, A. Vargas. A. Winchester, M. K. L. Man, M. Upmanyu, K. M. Dani, G. Gupta, S. Talapatra, A. D. Mohite, and S. Kar


Engineering photophenomena in large, three dimensional structures composed of self-assembled van der Waals heterostructure flakes

Adv. Opt. Materials 3, 1551 (2015)

B. M. K. Mariserla, M. K. L. Man, S. Vinod, C. Chin, T. Harada, J. Taha-Tijerina, C. S. Tiwary, P. Nguyen, P. Chang, T. N. Narayanan, A. Rubio, P. M. Ajayan, S. Talapatra, and K. M. Dani


Ultrafast intrinsic photoresponse and direct evidence of sub-gap states in liquid phase exfoliated MoS2 thin films

Sci. Rep. 5, 11272 (2015)

S. Ghosh, A. Winchester, B. Muchhaarla, M. Wasala, S. Feng, A. L. Elias, B. M. K. Mariserla, T. Harada, C. Chin, K. M. Dani, S. Kar, M. Terrones, and S. Talapatra


Ultrafast properties of femtosecond-laser-ablated GaAs and its application to terahertz optoelectronics

Opt. Lett. 40 (14), 3388-3391 (2015)

J. Madéo, A. Margiolakis, Z.-Y. Zhao, P. J. Hale, M. K. L. Man, Q.-Z. Zhao, W. Peng, W.-Z. Shi and K. M. Dani


Patch antenna terahertz photodetectors

Appl. Phys. Lett. 106, 161102 (2015)

D. Palaferri, Y. Todorov, Y. N. Chen, J. Madéo, A. Vasanelli, L. H. Li, A. G. Davies, E. H. Linfield, and C. Sirtori


Optically induced magnetic moments in symmetric graphene quantum dots

Phys. Rev. B 91, 035433 (2015)

E. G. Kavousanaki and K. M. Dani




A novel drug delivery method for neuropharmacological research, using liposomes and lasers

Neurotransmitter 1 (1): e424 (2014)

T. Nakano, C. Chin, J. Wickens, and K. M. Dani


20 THz broadband generation using semi-insulating GaAs interdigitated photoconductive antennas

Optics Express 22 (21), 26358-26364 (2014)

P. J. Hale, J. Madéo, C. Chin, S. S. Dhillon, J. Mangeney, J. Tignon, and K. M. Dani


Mimicking subsecond neurotransmitter dynamics with femtosecond laser stimulated nanosystems

Sci. Rep. 4, 5398 (2014)

T. Nakano, C. Chin, D. M. A. Myint, E. W. Tan, P. J. Hale, B. M. Krishna M., J. N. J. Reynolds, J. Wickens, and K. M. Dani


Quantum limit for nuclear spin polarization in semiconductor quantum dots

Phys. Rev. B 89, 205302 (2014)

J. Hildmann, E. Kavousanaki, G. Burkard, and H. Ribeiro




Optical transmission control in graphene oxide and its organic composites with ultrashort laser pulses

Journal of Optics 16, 1-6 (2014)

B. M. K. Mariserla, N. Venktramaiah, and D. N. Rao


Fe3S4 (greigite) formation by vapor–solid reaction

Journal of Materials Chemistry A 2, 1903-1913 (2013)

E. Bauer, K. L. M. Man, A. Pavlovska, A. Locatelli, T. O. Menteş, M. A. Niño, and M. S. Altman


Influence of solvent contribution on nonlinearities of near infra-red absorbing croconate and squaraine dyes with ultrafast laser excitation

Journal of Applied Physics 114, 1-8 (2013)

B. M. K. Mariserla and D. N. Rao




Intraband conductivity response in graphene observed using ultrafast infrared-pump visible-probe spectroscopy

Phys. Rev. B 86, 125403 (2012)

K. M. Dani, J. Lee, R. Sharma, A. D. Mohite, C. M. Galande, P. M. Ajayan, A. M. Dattelbaum, H. Htoon, A. J. Taylor, and R. P. Prasankumar


Signatures of spin blockade in the optical response of a charged quantum dot

Phys. Rev. B 86, 045122 (2012)

E. G. Kavousanaki and G. Burkard


Tracing ultrafast separation and coalescence of carriers in graphene with time-resolved photoemission

J. of Phys. Chemistry Lett. 3, 64-68 (2012)

S. Gilbertson, G. L. Dakovski, T. Durakiewics, J. Zhu, K. M. Dani, A. D. Mohite, A. M. Dattelbaum, and G. Rodriguez