OOIR: Observatory of International Research

Papers

(The H4-Index of Nature Photonics is 87. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-05-01 to 2025-05-01.)

Article	Citations
Photonics celebrates double Nobel Prize achievement	419
Lasers clean up graffiti	401
The race for wakefield-driven FELs	385
All-optical polarization switching in ferroelectrics	369
Deconvolution enhances fluctuation detection	368
Spatio-temporal control of incoherent light with metasurfaces	349
Small tunable X-ray sources may have large impact	327
Converting qubits	308
Quasi-phase-matched up- and down-conversion in periodically poled layered semiconductors	288
Generation and measurement of intense few-femtosecond superradiant extreme-ultraviolet free-electron laser pulses	273
Publisher Correction: Optical atomic clock interrogation using an integrated spiral cavity laser	255
Lithography-free reconfigurable photonic processor	254
Observation of loss-enhanced magneto-optical effect	244
On the simultaneous scattering of two photons by a single two-level atom	236
Topological orbital angular momentum extraction and twofold protection of vortex transport	235
Integrated electro-optic isolator on thin-film lithium niobate	222
Room-temperature upconverted superfluorescence	208
Coherent control of ultrafast extreme ultraviolet transient absorption	208
Novel light manipulation	203
A bit of gain, electrically injected	202
Ultrafast energy exchange between two single Rydberg atoms on a nanosecond timescale	196
New nonlinear opportunities in the ultraviolet	196
Electrically tunable nonlinear polaritonic metasurface	182
Photon-number entanglement generated by sequential excitation of a two-level atom	179
Cascaded hard X-ray self-seeded free-electron laser at megahertz repetition rate	178

Author Correction: High-precision digital terahertz phase manipulation within a multichannel field perturbation coding chip	177
Light sheets for continuous-depth holography and three-dimensional volumetric displays	177
Minute-scale Schrödinger-cat state of spin-5/2 atoms	176
Author Correction: A ferroelectric multilevel non-volatile photonic phase shifter	176
Femtosecond laser writes a broadband miniaturized isolator	165
A photonic quantum engine driven by superradiance	152
Resource-efficient photonic quantum computation with high-dimensional cluster states	150
Observation of light-driven band structure via multiband high-harmonic spectroscopy	148
Chiral phonons in microcrystals and nanofibrils of biomolecules	147
High-power AlGaN deep-ultraviolet micro-light-emitting diode displays for maskless photolithography	140
Harnessing plasma absorption in silicon MOS ring modulators	139
High-rate quantum key distribution exceeding 110 Mb s–1	138
Room-temperature electrically switchable spin–valley coupling in a van der Waals ferroelectric halide perovskite with persistent spin helix	138
Additive treatment yields high-performance lead-free perovskite light-emitting diodes	136
Wide-field coherent anti-Stokes Raman scattering microscopy using random illuminations	135
Advances in Brillouin–Mandelstam light-scattering spectroscopy	134
Metasurface-based bijective illumination collection imaging provides high-resolution tomography in three dimensions	132
Synthetic reflection self-injection-locked microcombs	127
Ultrafast atomic-scale scanning tunnelling spectroscopy of a single vacancy in a monolayer crystal	126
Unidirectional unpolarized luminescence emission via vortex excitation	125
Suppressing wide-angle light loss and non-radiative recombination for efficient perovskite solar cells	125
Hong–Ou–Mandel interference in colloidal CsPbBr3 perovskite nanocrystals	124
Integrated vortex soliton microcombs	123
All-optical temporal logic gates in localized exciton polaritons	122
A bright future for attosecond physics	122
Plasmonics commercialized?	122
Microdroplet manipulation	121
Super-resolution microscopy for the life sciences	120
Free-form dual-comb spectroscopy for compressive sensing and imaging	119
Phase control of terahertz waves moves on chip	119
Super-resolution microscopy at its sharpest	119
Photons walk on fractal graphs	117
Publisher Correction: Femtojoule femtosecond all-optical switching in lithium niobate nanophotonics	114
Dissimilar photons can bunch too	113
Two in one	111
Efficient emitters in the NIR-II window	110
Unlocking an optical bistability switch	108
Processing quantum randomness with light	107
A digital solution towards deep optical imaging	106
A photonic entanglement filter with Rydberg atoms	104
Anomalous circularly polarized light emission in organic light-emitting diodes caused by orbital–momentum locking	102
An open question	102
Plasmonic lasers turn magnetic	101
A new change of phase	100
Memristors go quantum	100
Author Correction: Giant optical anisotropy in a quasi-one-dimensional crystal	98
Author Correction: In vivo NIR-II fluorescence imaging for biology and medicine	96
Publisher Correction: A full degree-of-freedom spatiotemporal light modulator	96
Sub-cycle photonics in correlated materials	95
Shrinking time-domain spectroscopy to atomic dimensions	95

Author Correction: Sub-femtonewton force sensing in solution by super-resolved photonic force microscopy	95
Fast, three-dimensional, live-cell super-resolution imaging with multiplane structured illumination microscopy	94
Tracking nanoscopic motion with minima of light	93
Inverted organic solar cells with an in situ-derived SiOxNy passivation layer and power conversion efficiency exceeding 18%	92
Listening to microorganisms with light	92
Elucidating the photodegradation pathways of polymer donors for organic solar cells with seven months of outdoor operational stability	91
Wide-band frequency modulation of a terahertz intrinsic Josephson junction emitter of a cuprate superconductor	91
An adaptive moiré sensor for spectro-polarimetric hyperimaging	91
Sub-Doppler spectroscopy of quantum systems through nanophotonic spectral translation of electro-optic light	88
Polaritonic nonlocality in light–matter interaction	88
Spin-selective strong light–matter coupling in a 2D hole gas-microcavity system	88
Photonic-circuit-integrated titanium:sapphire laser	87