Theory on effects of vortex ellipliticity on vortex motion in a quantum fluid

C. Zhu, M. E. Siemens, and M. T. Lusk, "Dynamics of elliptical vortices in a trapped quantum fluid". Physical Review A, 104, 043306 (2021).

Experiment + theory demonstration hydrodynamics describes optical vortices motion

J. M. Andersen, A. A. Voitiv, M. E. Siemens, and M. T. Lusk, "Hydrodynamics of noncircular vortices in beams of light and other two-dimensional fluids". Physical Review A, 104, 033520 (2021).

Controlling spin and orbital angular momentum allows selective excitation of plasmon modes

B. Xu, B. M. Heffernan, K. Bae, M. E. Siemens, J. T. Gopinath, and W. Park, "Selective Excitation of Plasmon Resonances with Cylindrical Vector Beams." Optics Express, 29 (3), 13071-13083 (2021).

The rotational Doppler effect can be observed with incoherent light

A. Q. Anderson, E. F. Strong, B. M. Heffernan, M. E. Siemens, G. B. Rieker, and J. T. Gopinath, "Observation of the rotational Doppler shift with spatially incoherent light." Optics Express, 29 (3), 4058-4066 (2021).

How the detection method affects measurement of the rotational Doppler effect

A. Q. Anderson, E. F. Strong, B. M. Heffernan, M. E. Siemens, G. B. Rieker, and J. T. Gopinath, "Detection Technique Effect on Rotational Doppler Measurements." Optics Letters, 45(9), 2636-2639 (2020).

Optical vortex braiding

A. Voitiv, J. Andersen, M. E. Siemens, and M. T. Lusk, “Optical Vortex Braiding by Perturbation of a Bessel Beam.” Optics Letters, 45(6), 1321-1324 (2020).

Super-resolution imaging through optical fiber

B. M. Heffernan, S. A. Meyer, D. Restrepo, M. E. Siemens, E. A. Gibson, and J. T. Gopinath, "A Fiber-Coupled Stimulated Emission Depletion Microscope for Bend-Insensitive Through-Fiber Imaging." Scientific Reports 9, 11137 (2019)

Characterizing vortex beams with colienar phase-shifting holography

J. M. Andersen, S. N. Alperin, A. A. Voitiv, W. G. Holtzmann, J. T. Gopinath, and M. E. Siemens, “Characterizing Vortex Beams from a Spatial Light Modulator with Collinear Phase-Shifting Holography.” Applied Optics, 58, 404 (2019).

Vortex velocity statistics in laser speckle resemble quantum turbulence

S. N. Alperin, A. L. Grotelueschen, and M. E. Siemens, “Quantum Turbulent Structure in Light.” Physical Review Letters, 122, 044301 (2019).

OAM in reflection

M. T. Lusk, M. E. Siemens, and G. F. Quinteiro, “Large centroid shifts of vortex beams reflected from multi-layers.” Journal of Optics 21, 015601 (2018).

Extrinsic angular momentum in vortex chains

S. N. Alperin and M. E. Siemens, “Angular Momentum of Topologically Structured Darkness,” Physical Review Letters 119, 203902 (2017).

Coherence controls OAM in fiber

R. D. Niederriter, M. E. Siemens, and J. T. Gopinath, “Simultaneous control of orbital angular momentum and beam profile in two-mode polarization-maintaining fiber,” Optics Letters 41, 5736-5739 (2016). Editor’s pick

Measuring OAM with a single lens

S. N. Alperin, R. D. Niederriter, J. T. Gopinath, and M. E. Siemens, “Quantitative measurement of the orbital angular momentum of light with a single, stationary lens,” Optics Letters 41, 5109-5022 (2016). Editors' pick

Optical fiber generates light with OAM

R. D. Niederriter, M. E. Siemens, and J. T. Gopinath, “Continuously tunable orbital angular momentum generation using a polarization-maintaining fiber,” Optics Letters 41, 3213-3216 (2016).

Laser beam profiling with a tunable lens

R. D. Niederitter, J. T. Gopinath, and M. E. Siemens, “Measurement of the M2 beam propagation factor using a focus-tunable liquid lens,” Applied Optics 52, 1591 (2013).

Ultrafast timescales for magnetization dynamics

S. Mathias, C. La-O-Vorakiat, P. Grychtol, J. M. Shaw, R. Adam, H. T. Nembach, M. E. Siemens, S. Eich, C. M. Schneider, T. J. Silva, M. Aeschlimann, H. C. Kapteyn, and M. M. Murnane, "Probing the timescale of the exchange interaction in a ferromagnetic alloy," Proceedings of the National Academy of Sciences 109, 4792 (2012).

Element-resolved magnetization dynamics

C. La-O-Vorakiat, M. Siemens, S. Mathias, M. Aeschlimann, P. Grychtol, R. Adam, C. M. Schneider, J. M. Shaw, H. Nembach, T. J. Silva, M. M. Murnane, and H. C. Kapteyn, “Ultrafast Demagnetization Dynamics at the M Edges of Magnetic Elements Observed Using a Tabletop High-Harmonic Soft X-Ray Source,” Physical Review Letters 103, 257402 (2009).

2D spectroscopy of hidden silicon-vacancy centers in diamond

C. L. Smallwood, R. Ulbricht, M. W. Day, T. Schröder, K. M. Bates, T. M. Autry, G. Diederich, E. Bielejec, M. E. Siemens, and Steven T. Cundiff, "Hidden Silicon-Vacancy Centers in Diamond". Physical Review Letters, 126, 213601 (2021).

Fast phase-cycling in 2D spectroscopy

M. F. Muñoz, A. Medina, T. M. Autry, G. Moody, M. E. Siemens, A. D. Bristow, S. T. Cundiff, and H. Li, "Fast phase cycling in non-collinear optical two-dimensional coherent spectroscopy." Optics Letters, 45 (20), 5852-5855 (2020).

Absolute phase calibration in 2D spectroscopy

G. M. Diederich and M. E. Siemens, “Absolute phase calibration in phase-modulated multidimensional coherent spectroscopy.” Optics Letters 44, 3054 (2019).

1D slice four-wave mixing

G. M. Diederich, T. M. Autry, and M. E. Siemens, “Diagonal Slice Four-Wave Mixing: Natural Separation of Coherent Broadening Mechanisms.” Optics Letters 43, 6061 (2018).

Deconvolving 2D coherent spectra

M. Richter, R. Singh, M. E. Siemens, and Steven T. Cundiff, “Deconvolution of optical multidimensional coherent spectra”, Science Advances 4, 7697 (2018).

Multidimensional coherent spectroscopy tutorial

M. E. Siemens, “Tutorial on multidimensional coherent spectroscopy,” Encyclopedia of Modern Optics, 2nd edition (2018).

Localization of quantum well excitons

R. Singh, M. Richter, G. Moody, M. E. Siemens, H. Li, and S. T. Cundiff, “Localization dynamics of excitons in disordered semiconductor quantum wells,” Physical Review B 95, 235307 (2017).

Many-body interactions of excitons in quantum wells causes anharmonicity in 2D spectra

R. Singh, T. Suzuki, T. M. Autry, G. Moody, M. E. Siemens, and S. T. Cundiff, “Polarization Dependent Exciton Linewidth in Semiconductor Quantum Wells – a Consequence of Bosonic Nature of Excitons”, Physical Review B, Rapid Communications 94, 081304 (2016).

Quantifying spectral diffusion of excitons in a quantum well with 2D coherent spectroscopy

R. Singh, G. Moody, M. E. Siemens, H. Li, and S. T. Cundiff, “Quantifying Spectral Diffusion by Direct Measurement of the Correlation Function for Excitons in Semiconductor Quantum Wells,” Journal of the Optical Society of America B, 33, 1330-1364 (2016).

Full analytical calculation of 2D coherent spectra

J. D. Bell, R. Conrad, and M. E. Siemens, “Analytical calculation of two-dimensional spectra,” Optics Letters 40, 1157 (2015).

Measurement of the full Hamiltonian for a gas vapor system with 3D spectroscopy

H. Li, A. D. Bristow, M. E. Siemens, G. Moody, and S. T. Cundiff, “Unraveling quantum pathways using optical 3D Fourier-transform spectroscopy,” Nature Communications 4, 1390 (2013).

Many-body interactions of excitons in a quantum well measured with 2D coherent spectroscopy

D. B. Turner, P. Wen, D. H. Arias, K. A. Nelson, H. Li, G. Moody, M. E. Siemens, and S. T. Cundiff, “Persistent exciton-type many-body interactions in GaAs quantum wells measured using two-dimensional optical spectroscopy,” Physical Review B 85, 201303(R) (2012).

Exciton transport in a rough quantum well

G. Moody, A. D. Bristow, M. E. Siemens, X. Dai, D. Karaiskaj, R. P. Mirin, and S. T. Cundiff, “Excitonic energy relaxation in a GaAs/AlGaAs quantum well heterostructure”, Physical Review B 83, 245316 (2011).

Exciton-phonon dynamics in a quantum well revealed with 2D coherent spectroscopy

G. Moody, M. E. Siemens, A. D. Bristow, X. Dai, D. Karaiskaj, A. S. Bracker, D. Gammon, and S. T. Cundiff, “Exciton-exciton and exciton-phonon interactions in an interfacial GaAs quantum dot ensemble”, Physical Review B 83, 115324 (2011).

Homogeneous and inhomogeneous linewidths of excitons in quantum wells

A. D. Bristow, T. Zhang, M. E. Siemens, S. T. Cundiff, and R. P. Mirin, “Separating Homogeneous and Inhomogeneous Line Widths of Heavy- and Light-Hole Excitons in Weakly Disordered Semiconductor Quantum Wells,” Journal of Physical Chemistry B 115, 5365 (2011).

Exciton-phonon dynamics in a quantum well revealed with 2D coherent spectroscopy

G. Moody, M. E. Siemens, A. D. Bristow, X. Dai, D. Karaiskaj, A. S. Bracker, D. Gammon, and S. T. Cundiff, “Exciton-exciton and exciton-phonon interactions in an interfacial GaAs quantum dot ensemble”, Physical Review B 83, 115324 (2011).

Exciton dynamics in a rough quantum well

G. Moody, M. E. Siemens, A. D. Bristow, X. Dai, D. Karaiskaj, A. S. Bracker, D. Gammon, and S. T. Cundiff, “Spectral broadening and population relaxation in a GaAs interfacial quantum dot ensemble and quantum well nanostructure,” physica status solidi b 248, 829 (2011).

2D spectra lineshapes allow measurement of homo/inhomogeneous linewidths

M. E. Siemens, G. Moody, H. Li, A. D. Bristow, and S. T. Cundiff, "Resonance lineshapes in two-dimensional Fourier transform spectroscopy," Opt. Express 18, 17699 (2010).

Modeling and measuring nanosphere cooling

B. G. Green, S. M. Budy, S. M. Reed, and M. E. Siemens, “Measurement and multilayer model of cooling of gold nanoparticles: Transient thermoreflectance experiments and multilayer analytical modeling.” Journal of Applied Physics 124, 144301 (2018).

Phonon dynamics measurements in perovskite films: better-than-expected conductivity

Q. Chen, C. Zhang, M. Zhu, S. Liu, M. Siemens, S. Gu, J. Zhu, J. Shen, X. Wu, C. Liao, J. Zhang, X. Wang, and M. Xiao, “Efficient Thermal Conductance in Organometallic Perovskite CH3NH3PbI3 Films,” Applied Physics Letters 108, 081902 (2016).

Non-contact detection of surface acoustic waves up to 80 GHz

Q. Li, K. Hoogeboom-Pot, D. Nardi, M. E. Siemens, O. Hellwig, E. Dobisz, B. Gurney, M. M. Murnane, H. C. Kapteyn, R.G. Yang, and K. A. Nelson, “Generation and control of ultrashort-wavelength two-dimensional surface acoustic waves at nanoscale interfaces,” Physical Review B 85, 195431 (2012).

Physics of laser-excited acoustic waves

D. Nardi, M. Travagliati, M. E. Siemens, Q. Li, M. M. Murnane, H. C. Kapteyn, G. Ferrini, F. Parmigiani, F. Banfi, "Probing Thermomechanics at the Nanoscale: Impulsively Excited Pseudosurface Acoustic Waves in Hypersonic Phononic Crystals", Nano Letters 11, 4126 (2011).

Breakdown of thermal diffusion near nanostructured heaters

M. E. Siemens, Q. Li, M. M. Murnane, H. C. Kapteyn, R.G. Yang, K. A. Nelson, “Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft X-ray beams”, Nature Materials 9, 26 (2010).

Soft x-ray probing of high-frequency surface acoustic waves

M. E. Siemens, Q. Li, M. M. Murnane, H. C. Kapteyn, R.G. Yang, E. H. Anderson, K. A. Nelson, “High-Frequency Surface Acoustic Wave Propagation in Nanostructures Characterized by Coherent Extreme Ultraviolet Beams”, Applied Physics Letters 94, 093103 (2009).

Dynamic surface holography with extreme ultraviolet light

R. I. Tobey, M. E. Siemens, O. Cohen, M. M. Murnane, H. C. Kapteyn, and K. A. Nelson, "Ultrafast extreme ultraviolet holography: dynamic monitoring of surface deformation," Optics Letters 32(3), 286 (2007).

Non-contact generation and measurement of surface acoustic waves

R. I. Tobey, M. E. Siemens, M. M. Murnane, H. C. Kapteyn, D. Torchinsky, and K. A. Nelson, “Transient grating measurement of surface acoustic waves in thin metal films with extreme ultraviolet radiation,” Applied Physics Letters 89, 091108 (2006).

Using diffraction of soft x-ray light to measure surface acoustic waves in nanostructures

R. I. Tobey, E. Gershgoren, M. E. Siemens, M. M. Murnane, H. C. Kapteyn, T. Feurer, and K. A. Nelson, “Nanoscale photothermal and photoacoustic transients probed with extreme ultraviolet radiation,” Applied Physics Letters 85, 564 (2004).