An optical fiber integrated device for nonlinear generation of femtosecond mid-infrared pulses DOI
Hannes Kempf,

Matthias Hagner,

Philipp Sulzer

et al.

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 124(26)

Published: June 24, 2024

Compact and broadband mid-infrared (MIR) sources are in high demand because of a wide range potential applications such as molecular sensing the fingerprint region. The generation coherent MIR radiation at arbitrary frequencies typically requires nonlinear mixing between least two input waves, which is often cumbersome to implement. We present an integrated and, therefore, adjustment-free solution combining few-femtosecond pulse compression germanosilicate optical fiber rectification. To this end, 16-μm-thin GaSe crystal directly mounted on end facet highly assembly exploiting focused ion beam. With pulses minute energy 5 nJ duration 120 fs telecom wavelength 1.55 μm, we obtain ultrabroadband phase-stable output transients. Electro-optic sampling free space reveals single-cycle with spectral components covering entire from 10 THz.

Language: Английский

Strong–laser–field physics, non–classical light states and quantum information science DOI

Upasana Bhattacharya,

Theocharis Lamprou, Andrew S. Maxwell

et al.

Reports on Progress in Physics, Journal Year: 2023, Volume and Issue: 86(9), P. 094401 - 094401

Published: July 25, 2023

Strong laser physics is a research direction that relies on the use of high-power lasers and has led to fascinating achievements ranging from relativistic particle acceleration attosecond science. On other hand, quantum optics been built low photon number sources opened way for groundbreaking discoveries in technology, advancing investigations fundamental tests theory information processing. Despite tremendous progress, until recently these directions have remained disconnected. This because, majority interactions strong-field limit successfully described by semi-classical approximations treating electromagnetic field classically, as there was no need include properties explain observations. The link between strong physics, optics, science developed recent past. Studies based fully quantized conditioning approaches shown intense laser--matter can be used generation controllable entangled non-classical light states. achievement opens vast stemming symbiosis Here, after an introduction fundamentals directions, we report progress description interaction methods states Also, discuss future engineering using fields, potential applications ultrafast

Language: Английский

Citations

32
High-output ∼3 μ m MIR pulsed laser enabled by surface state regulation in PtTe2 optical switch DOI Open Access
Shande Liu, Yicheng Jin, Jiawen Lv

et al.

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 124(21)

Published: May 20, 2024

Mid-infrared (MIR) pulsed lasers operating in the ∼3 μm region play a crucial role various applications, including molecular spectroscopy, ultrafast imaging, and laser-assisted surgery. Despite recent advancements MIR gain platforms, notable technological challenge remains absence of an effective optical Q-switch. Here, remarkable Q-switch 3 based on Dirac semimetal PtTe2 saturable absorber is realized. By modulating surface state PtTe2, laser exhibited increase average power, escalating from 521 to 588 mW, accompanied by significant decrease pulse width 368 187 ns. Nondegenerate pump–probe measurements showed that recombination rate photocarrier thinner nanoplates was effectively accelerated, primarily attributed substantial density, leading better absorption performance. As thickness decreases, nonsaturable loss decreases 12% 3%, while modulation depth increases 6% 12%. The enhanced nonlinear enables flexible saturation parameters, which endows high-performance generation.

Language: Английский

Citations

10
Electric-Field Molecular Fingerprinting to Probe Cancer DOI Creative Commons
Kosmas V. Kepesidis, Philip Jacob,

Wolfgang Schweinberger

et al.

ACS Central Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Human biofluids serve as indicators of various physiological states, and recent advances in molecular profiling technologies hold great potential for enhancing clinical diagnostics. Leveraging developments laser-based electric-field fingerprinting, we assess its vitro In a proof-of-concept study involving 2533 participants, conducted randomized measurement campaigns to spectroscopically profile bulk venous blood plasma across lung, prostate, breast, bladder cancer. Employing machine learning, detected infrared signatures specific therapy-naïve cancer distinguishing them from matched control individuals with cross-validation ROC AUC 0.88 lung values ranging 0.68 0.69 the other three entities. an independent held-out test data set, designed reflect different experimental conditions those used during model training, achieved detection 0.81. Our demonstrates that fingerprinting is robust technological framework broadly applicable disease phenotyping under real-world conditions.

Language: Английский

Citations

1
Ultra-CEP-stable single-cycle pulses at 2.2 µm DOI Creative Commons
Maciej Kowalczyk,

Nathalie Nagl,

Philipp Steinleitner

et al.

Optica, Journal Year: 2023, Volume and Issue: 10(6), P. 801 - 801

Published: May 12, 2023

Single-cycle optical pulses with controllable carrier-envelope phase (CEP) form the basis to manipulate nonlinear polarization of matter on a sub-femtosecond time scale. Moreover, light–matter energy exchange and frequency conversion processes benefit from longer, infrared wavelengths. We report highly stable source 6.9-fs, single-cycle at 2.2 µm, based directly diode-pumped Cr:ZnS oscillator 22.9-MHz repetition rate. Extreme spectral broadening output super-octave bandwidth (1.1–3.1 µm) is achieved in single rutile (TiO 2 ) plate. Excellent agreement simulations provides precise understanding underlying pulse propagation. A comprehensive investigation alternative materials additional out exceptional TiO due favorable interplay self-focusing, plasma formation accompanied by self-phase modulation self-compression. Unprecedented reproducibility waveforms ensured unique combination active CEP stabilization residual jitter only 5.9 mrad (0.1 Hz 11.45 MHz) relative intensity noise 0.036% 1 MHz). The new permits efficient downconversion mid-infrared cascaded intra-pulse difference generation, giving access manipulation electric currents low-bandgap an unprecedented degree control.

Language: Английский

Citations

15
Dual-oscillator infrared electro-optic sampling with attosecond precision DOI Creative Commons
Alexander Weigel, Philip Jacob,

Wolfgang Schweinberger

et al.

Optica, Journal Year: 2024, Volume and Issue: 11(5), P. 726 - 726

Published: March 29, 2024

Electro-optic sampling of infrared electric fields has set sensitivity and dynamic-range records in broadband molecular vibrational spectroscopy. Yet, these works, the 1-second-scale single-trace acquisition time leads to intra-scan noise accumulation restricts throughput measurements multiple samples dynamic processes. We present a dual-laser-oscillator approach capturing 2800 mid-infrared waveforms per second by scanning relative delay between sampled waveform gate pulses using modulated repetition-frequency lock. The new technique electro-optic tracking (EODT) provides calibration with down few-attosecond precision general route high-precision dual-oscillator spectroscopy picosecond ranges. Our work immediate applications in, e.g., electric-field metrology high-speed biosensing.

Language: Английский

Citations

5
Lightwave-electronic harmonic frequency mixing DOI Creative Commons
Matthew Yeung,

Lu‐Ting Chou,

Marco Turchetti

et al.

Science Advances, Journal Year: 2024, Volume and Issue: 10(33)

Published: Aug. 14, 2024

Electronic frequency mixers are fundamental building blocks of electronic systems. Harmonic mixing in particular enables broadband electromagnetic signal analysis across octaves spectrum using a single local oscillator. However, conventional harmonic do not operate beyond hundreds gigahertz to few terahertz. If extended the petahertz scale compact and scalable form, would enable field-resolved optical spanning spectra monolithic device without need for conversion nonlinear crystals. Here, we demonstrate lightwave-electronic 0.350 PHz plasmonic nanoantennas. We that process complete, detection spectral content far outside oscillator, greatly extending range detectable frequencies compared heterodyning techniques. Our work has important implications applications where signals interest exhibit coherent femtosecond-scale dynamics multiple harmonics.

Language: Английский

Citations

5
Petahertz electronics DOI
Christian Heide,

Phillip D. Keathley,

Matthias F. Kling

et al.

Nature Reviews Physics, Journal Year: 2024, Volume and Issue: 6(11), P. 648 - 662

Published: Oct. 3, 2024

Citations

5
Continuous-wave long-wavelength infrared difference-frequency generation in ZGP driven by near-infrared fiber lasers DOI
Bo Hu, Lu Chen, Xuemei Yang

et al.

Optics Letters, Journal Year: 2024, Volume and Issue: 49(4), P. 1101 - 1101

Published: Jan. 26, 2024

We report the continuous-wave (cw) difference-frequency generation (DFG) in a ZnGeP 2 (ZGP) crystal that produces tunable long-wavelength infrared (LWIR) lasing. Particularly, we experimentally demonstrate feasibility to drive DFG ZGP by all-fiber near-infrared fiber lasers consisting of 1.3 µm cw random Raman laser (RRFL) and 1.5 erbium-doped amplifier seeded distributed feedback (DFB) laser, making whole system compact robust. As result, demonstrated LWIR presents broadband spectral tuning range spanning from 9.5 11.5 µm, output powers 9.5–11 are larger than 40 µW pumped watt-level lasers. Meanwhile, as typical application, proof-of-concept demonstration gas sensing SF 6 is executed based on generated source. Our work demonstrates combination can provide an effective robust approach for radiation with useful power wavelength tunability.

Language: Английский

Citations

4
Ultrafast high-harmonic spectroscopy of solids DOI
Christian Heide, Yuki Kobayashi, Sheikh Rubaiat Ul Haque

et al.

Nature Physics, Journal Year: 2024, Volume and Issue: 20(10), P. 1546 - 1557

Published: Oct. 1, 2024

Language: Английский

Citations

4
Ultrafast All‐Optical Switching and Active Sub‐Cycle Waveform Control via Time‐Variant Photodoping of Terahertz Metasurfaces DOI Creative Commons
Jeongmin Jang, Junsuk Rho, Hee Jun Shin

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Abstract The development of high‐speed and high‐performance optical switches has been a long‐standing issue in the field photonics. This paper introduces pioneering time‐resolved spectroscopy‐based approach for realizing photon‐induced ultrafast terahertz (THz) modulation within an electrical split‐ring resonator (SRR) via photoexcitation, rather than relaxation dynamics, silicon‐based indirect‐bandgap material. Two competitive effects (shorting LC circuit metallization substrate) occur during THz modulation. tradeoff between these two enables switching different time scales photoexcitation processes—THz‐optical cooperative effect phonon‐assisted electron transition. THz‐optical causing shorting circuit, observed SRR gap, whose size typically exceeds that facilitating impact ionization (IMI). Notably, remarkably short 1.3 ps achieved only with transmission intensity depth over 500%. In addition, active temporal waveform control down to sub‐cycle pulse successfully demonstrated. proposed suggests new route constructing efficient dynamic photonic devices potential applications control.

Language: Английский

Citations

0