In-line ultra-thin attosecond delay line with direct absolute-zero delay reference and high stability

Dahiya, Sunil; Sidhu, Mehra S.; Tyagi, Akansha; Mandal, Ankur; Nandy, Biplob; Rost, Jan M.; Pfeifer, Thomas; Singh, Kanwarpal

doi:10.1364/ol.403842

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…We think that the present delay line can be used for XUV-IR attosecond experiments. For example, one can split the input pulse asymmetricaly such that the strong arm is used for high harmonic generation while the weak one can serve as a time-delayed collinear probe 15 . Furthermore, using vertically stacked prisms pairs and mirrors, a quadrant splitting of the input wavefront should be possible for multidimensional IR-IR and XUV-IR ultrafast experiments 41 .…”

Section: Discussionmentioning

confidence: 99%

Attosecond stable dispersion-free delay line for easy ultrafast metrology

Tyagi

Sidhu

Mandal

et al. 2022

Sci Rep

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We demonstrate a dispersion-free wavefront splitting attosecond resolved interferometric delay line for easy ultrafast metrology of broadband femtosecond pulses. Using a pair of knife-edge prisms, we symmetrically split and later recombine the two wavefronts with a few tens of attosecond resolution and stability and employ a single-pixel analysis of interference fringes with good contrast using a phone camera without any iris or nonlinear detector. Our all-reflective delay line is theoretically analyzed and experimentally validated by measuring 1st and 2nd order autocorrelations and the SHG-FROG trace of a NIR femtosecond pulse. Our setup is compact, offers attosecond stability with flexibility for independent beam-shaping of the two arms. Furthermore, we suggest that our compact and in-line setup can be employed for attosecond resolved pump-probe experiments of matter with few-cycle pulses.

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Section: Discussionmentioning

confidence: 99%

Attosecond stable dispersion-free delay line for easy ultrafast metrology

Tyagi

Sidhu

Mandal

et al. 2022

Sci Rep

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“…∆D(θ ) denotes the angle dependent path difference introduced by the lower glass plate. Upon rotation of the lower glass plate by an angle θ , the light travels an extra optical path in the glass, which for a plate of refractive index n and thickness t, is given as [26][27][28] ,…”

Section: Theoretical Analysismentioning

confidence: 99%

Ultrathin Picoscale White Light Interferometer

Dahiya

Tyagi

Mandal

et al. 2021

Preprint

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White light interferometry is a well established technique with diverse precision applications, however, the conventional interferometers such as Michelson, Mach-Zehnder or Linnik are large in size, demand tedious alignment for obtaining white light fringes, require noise-isolation to achieve sub-nanometric stability and importantly, exhibit unbalanced dispersion causing uncertainty in absolute zero delay reference. Here, we demonstrate an ultrathin white light interferometer enabling picometer resolution by exploiting the wavefront division of a broadband incoherent light beam after transmission through a pair of micrometer thin identical glass plates. Spatial overlap between the two diffracted split wavefronts readily produce high-contrast and stable white light fringes, with unambiguous reference to absolute zero path-delay position. The colored fringes evolve when one of the ultrathin plates is rotated to tune the interferometer with picometric precision over tens of µm range. Our theoretical analysis validates formation of fringes and highlights self-calibration of the interferometer for picoscale measurements. We demonstrate measurement of coherence lengths of several broadband incoherent sources as small as a few micrometer with picoscale precision. Furthermore, we propose a versatile double-pass configuration using the ultrathin interferometer enabling a sample cavity for additional applications in probing dynamical properties of matter.

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“…The ultrathin glass substrate is becoming essential for several mass-market applications owing to its low cost, high surface toughness, and excellent sub-1 nm flatness. UT-glass has been used for making micro-fluidic devices, flexible electronic devices, and stable attosecond delay-lines 29 . However, the possibility of combining an ultrathin glass with NV center for building flexible quantum sensors remains unexplored.…”

Section: Introductionmentioning

confidence: 99%

Nanodiamonds enable femtosecond-processed ultrathin glass as a hybrid quantum sensor

Dadhich

Panda

Sidhu

et al. 2023

Preprint

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The quantum properties of fluorescent nanodiamonds offer great promise for fabricating quantum-enabled devices for physical applications. However, the nanodiamonds need to be suitably combined with a substrate to exploit their properties. Here, we show that ultrathin and flexible glass (thickness 30 microns) can be functionalized by nanodiamonds and nano-shaped using intense femtosecond pulses to design cantilever-based nanomechanical hybrid quantum sensors. Thus fabricated ultrathin glass cantilevers show stable optical, electronic, and magnetic properties of nitrogen-vacancy centers including well-defined fluorescence with zero-phonon lines and optically detected magnetic resonance (ODMR) near 2.87 GHz. We demonstrate several sensing applications of the ultrathin glass cantilever by measuring acoustic pulses, external magnetic field, or CW laser-induced heating by measuring Zeeman splitting and thermal shifting of ODMR lines. This work demonstrates the suitability of the femtosecond-processed ultrathin glass as a new versatile substrate for multifunctional quantum devices.

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In-line ultra-thin attosecond delay line with direct absolute-zero delay reference and high stability

Cited by 9 publications

References 32 publications

Attosecond stable dispersion-free delay line for easy ultrafast metrology

Attosecond stable dispersion-free delay line for easy ultrafast metrology

Ultrathin Picoscale White Light Interferometer

Nanodiamonds enable femtosecond-processed ultrathin glass as a hybrid quantum sensor

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