Latest and representative publications are listed below. A full list of publications can be found at 听听
Latest Publications听
Eugene J Tsao, Alexander J Lind, Connor Fredrick, Ryan K Cole, Peter Chang, Kristina F Chang, Dahyeon Lee, Matthew Heyrich, Nazanin Hoghooghi, Franklyn Quinlan, Scott A Diddams, "Dual comb correlation spectroscopy of thermal light,"听 听(2024)听 听
William Groman, Igor Kudelin, Alexander Lind, Dahyeon Lee, Takuma Nakamura, Yifan Liu, Megan L Kelleher, Charles A McLemore, Joel Guo, Lue Wu, Warren Jin, John E Bowers, Franklyn Quinlan, Scott A Diddams, "Photonic Millimeter-wave Generation Beyond the Cavity Thermal Limit,"听听(2024)
Igor Kudelin, Pedram Shirmohammadi, William Groman, Samin Hanifi, Megan L Kelleher, Dahyeon Lee, Takuma Nakamura, Charles A McLemore, Alexander Lind, Dylan Meyer, Junwu Bai, Joe C Campbell, Steven M Bowers, Franklyn Quinlan, Scott A Diddams, "Tunable X-band opto-electronic synthesizer with ultralow phase noise"听 (2024)
Noah Lordi, Eugene Tsao, Alex Lind, Scott Diddams, Joshua Combes, "Quantum theory of temporally mismatched homodyne measurements with applications to optical-frequency-comb metrology."听Physical Review A听109,听033722 (2024)听
Molly Kate Kreider, Connor Fredrick, Scott A. Diddams, Ryan C. Terrien, Suvrath Mahadevan, Joe P. Ninan, Chad F. Bender, Daniel Mitchell, Jayadev Rajagopal, Arpita Roy, Christian Schwab, Jason T. Wright, "Quantifying broadband chromatic drifts in Fabry-Perot resonators for exoplanet science," (2024)听听听
Kristina F. Chang, Daniel M. B. Lesko, Carter Mashburn, Peter Chang, Eugene Tsao, Alexander J. Lind, and Scott A. Diddams, "Multi-harmonic near-infrared鈥搖ltraviolet dual-comb spectrometer," Opt. Lett.听49, 1684-1687 (2024) 听
Igor Kudelin, Will Groman, et al., 鈥淧hotonic chip-based low noise microwave oscillator鈥� Nature听(2024).
Tsung-Han Wu, Luis Ledezma, Connor Fredrick, Pooja Sekhar, Ryoto Sekine, Qiushi Guo, Ryan M. Briggs, Alireza Marandi, Scott A. Diddams, 鈥淰isible to Ultraviolet Frequency Comb Generation in Lithium Niobate Nanophotonic Waveguides,鈥� Nat. Photon.听(2024). and 听听
Yifan Liu,听et al. "Low-noise microwave generation with an air-gap optical reference cavity,"听APL Photonics听9,听010806 (2024).听
W. Hettel, et al. 听"Compact, ultrastable, high repetition-rate 2 渭m and 3 渭m fiber laser for seeding mid-IR OPCPA," Opt. Express听32, 4072-4080 (2024)听
G Stef谩nsson, et al., "A Neptune-mass exoplanet in close orbit around a very low-mass star challenges formation models," Science,听382, 1031-1035 (2023)听
Ryan K. Cole, Connor Fredrick, Newton H. Nguyen, Scott A. Diddams, 鈥淧recision Doppler Shift Measurements with a Frequency Comb Calibrated Laser Heterodyne Radiometer,鈥� Opt. Lett.听48, 5185-5188 (2023)听鈥�
Nazanin Hoghooghi et al., 鈥淐omplete reactants-to-products observation of a gas-phase chemical reaction with broad, fast mid-infrared frequency combs,鈥� (2023)听鈥�
Pooja Sekhar, Connor Fredrick, David R. Carlson, Zachary Newman, Scott A. Diddams, 鈥�20 GHz fiber-integrated femtosecond pulse and supercontinuum generation with a resonant electro-optic frequency comb,鈥� APL Photonics听8,听116111听(2023).
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Reviews听
Nemanja Jovanovic et al., 鈥�2023 Astrophotonics Roadmap: pathways to realizing multi-functional integrated astrophotonic instruments,鈥� J. Phys. Photonics听5听042501 (2023)听听
S. Diddams, K. Vahala, and T. Udem, 鈥淥ptical Frequency Combs: Coherently Uniting the Electromagnetic Spectrum,鈥� Science 369, eaay3676 (2020). 听
D. A. Fischer, et al. 鈥淪tate of the Field: Extreme Precision Radial Velocities,鈥澨� Publications of the Astronomical Society of the Pacific, 128, 066001 (2016)听 听
T. J. Kippenberg, R.L. Holzwarth and S.A. Diddams, 鈥淢icroresonator based optical frequency combs,鈥� Science 332, 555 (2011). 听
S.A. Diddams, 鈥淭he evolving optical frequency comb,鈥� JOSA B 27, B51 (2010).听 听
M. C. Stowe, M. J. Thorpe, A. Pe'er, J. Ye, J. Stalnaker, V. Gerginov, and S. Diddams, "Direct frequency comb spectroscopy," in Advances in Atomic, Molecular and Optical Physics, vol. 55, E. Arimondo and P. Berman, eds., (Elsevier, 2007).听
S. A. Diddams, J. C.听 Bergquist,听 S. R. Jefferts and C. W. Oates, 鈥淪tandards of time and frequency at the outset of the 21st century,鈥� Science, 306, 1318 (2004).听 听听
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Frequency Combs听
N. Hoghooghi, S. Xing, P. Chang, D. Lesko, A. Lind, G. Rieker, S. Diddams 鈥�1-GHz mid-infrared frequency comb spanning 3 to 13 mm,鈥� Light Sci Appl 11, 264 (2022). 听
D. M. Lesko, H. R. Timmers, S. Xing, A. S. Kowligy, A. J. Lind, and S. A. Diddams, 鈥淎 6-octave optical frequency comb from a scalable few-cycle Erbium fiber laser,鈥澨�Nature Photonics听(2021).听
S. Xing, D.M.B. Lesko, T. Umeki, A. J. Lind, N. Hoghooghi, T.-H. Wu, S. A. Diddams, 鈥淪ingle-cycle all-fiber frequency comb,鈥� APL Photon. 6, 086110 (2021). 听
Andrew J. Metcalf, Connor D. Fredrick, Ryan C. Terrien, Scott B. Papp, and Scott A. Diddams, "30鈥夆�塆Hz electro-optic frequency comb spanning 300鈥夆�塗Hz in the near infrared and visible," Opt. Lett.鈥��44, 2673-2676 (2019) 听
D. R. Carlson, D. Hickstein, W. Zhang, A.J. Metcalf, F. Quinlan, S. Diddams, and S. Papp, 鈥淯ltrafast electro-optic light with subcycle control, Science 361, 1358 (2018).听 听
Holly Leopardi, Josue Davila-Rodriguez, Franklyn Quinlan, Judith Olson, Jeff A. Sherman, Scott A. Diddams, and Tara M. Fortier, "Single-branch Er:fiber frequency comb for precision optical metrology with 10鈭�18听fractional instability,"听Optica听4, 879-885 (2017)听
F. C. Cruz,听听D. L. Maser,听听T. Johnson,听听G. Ycas,听听A. Klose, F. R. Giorgetta, I. Coddington, and S. A. Diddams, 鈥淢id-infrared optical frequency combs based on difference frequency generation for molecular spectroscopy,鈥澨�Opt. Express听23, 26815 (2015).听听
A. Bartels, D. Heinecke, S. A. Diddams, 鈥�10 GHz Self-referenced Optical Frequency Comb,鈥� Science 326, 681 (2009).听
T. Fortier, A. Bartels, S.A. Diddams, 鈥淥ctave-spanning Ti:sapphire laser with a repetition rate >1 GHz for optical frequency measurements and comparisons,鈥� Opt. Lett. 31, 1011 (2006).听
D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, 鈥淐arrier-envelope phase control of femtosecond modelocked lasers and direct optical frequency synthesis,鈥� Science 288, 635 (2000).听
S. A. Diddams,听听D. J. Jones, Jun Ye, S. T. Cundiff, J. L. Hall, J. K. Ranka, R. S. Windeler, R. Holzwarth, T. Udem, and T. W. H盲nsch, 鈥淒irect link between microwave and optical frequencies with a 300 THz femtosecond laser comb,鈥澨齈hys. Rev. Lett. 84, 5102 (2000).听听.听听A Phys. Rev. Lett. 50th anniversary milestone letter.
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Optical Clocks & Stable Lasers
CA McLemore, et al. 鈥淢iniaturizing Ultrastable Electromagnetic Oscillators: Sub 10-14 Frequency Instability from a Centimeter-Scale Fabry-Perot Cavity鈥�, Physical Review Applied 18 (5), 054054 (2022) 听听
K. Beloy, et al., 鈥淔requency Ratio Measurements with 18-digit Accuracy Using a Network of Optical Clocks,鈥� Nature 591, 564 (2021). 听
Z. L. Newman, et al., "Architecture for the photonic integration of an optical atomic clock," Optica 6, 680-685 (2019). 听
S.B. Papp, K. Beha, P. Del'Haye, F. Quinlan, H. Lee, K. Vahala, and S.A. Diddams, 鈥淎 microresonator frequency comb optical clock,鈥� Optica 1, 10 (2014). 听听
T. Rosenband, et al., 鈥淔requency Ratio of Al+ and Hg+ Single-Ion Optical Clocks:听 Metrology at the 17th Decimal Place,鈥� Science 319, 1808 (2008) 听
S. A. Diddams, Th. Udem, J. C. Bergquist, E. A. Curtis, R. E. Drullinger, L. Hollberg, W. M. Itano, W. D. Lee, C. W. Oates, K. R. Vogel, and D. J. Wineland, 鈥淎n optical clock based on a single trapped 199Hg+ ion,鈥澨� Science 293, 825 (2001). 听
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Optical and Microwave Frequency Synthesis听
T. Nakamura, et al., 鈥淐oherent Optical Clock Down-Conversion for Microwave Frequencies with 10-18 Instability,鈥� Science 368, 889-892 (2020).听 听
D. T. Spencer, et al., 鈥淎n Integrated-Photonics Optical-Frequency Synthesizer,鈥� Nature 557, 81 (2018). 听
Katja Beha, Daniel C. Cole, Pascal Del鈥橦aye, Aur茅lien Coillet, Scott A. Diddams, and Scott B. Papp, "Electronic synthesis of light," Optica 4, 406-411 (2017).听
T. M Fortier, et al., 鈥淥ptically referenced broadband electronic synthesizer with 15 digits of resolution,鈥� Laser Photonics Rev. 10, 780鈥�790 (2016) 听听听
T. Fortier, M. Kirchner, F. Quinlan, J. Taylor, J.C. Bergquist, Y. Jiang, A. Ludlow, C.W. Oates, T. Rosenband, and S.A. Diddams, 鈥淕eneration of ultrastable microwaves via optical frequency division,鈥� Nature Photonics 5, 425 (2011).听 听
A. Bartels, S.A. Diddams, C.W. Oates, G. Wilpers, J. C. Bergquist, W. Oskay, L. Hollberg, 鈥淔emtosecond laser based synthesis of ultrastable microwave signals from optical frequency references,鈥澨齇pt Lett. 30, 667 (2005).听
L.-S. Ma, Z. Bi, A. Bartels, L. Robertsson, M. Zucco, R. S. Windeler, G. Wilpers, C. Oates, L. Hollberg, S. A. Diddams, 鈥淥ptical frequency synthesis and comparison with uncertainty at the 10-19听level,鈥� Science,听303, 1843 (2004).听
听J. Ye, J.L. Hall, and S.A. Diddams, 鈥淧recision phase control of ultrawide-bandwidth femtosecond laser:听听A network of ultrastable frequency marks across the visible spectrum, Opt. Lett. 25, 1675 (2000).听
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Frequency Comb Spectroscopy听
A. S. Kowligy, H. Timmers, A. J. Lind, U. Elu, F. C. Cruz, P. G. Schunemann, J. Biegert, and S. A. Diddams, 鈥淚nfrared electric-field sampled frequency comb spectroscopy,鈥� Science Advances 5, eaaw8794 (2019).听 听
Nima Nader, et al., "Infrared frequency comb generation and spectroscopy with suspended silicon nanophotonic waveguides,"听Optica听6, 1269-1276 (2019).听
Henry Timmers, Abijith Kowligy, Alex Lind, Flavio C. Cruz, Nima Nader, Myles Silfies, Gabriel Ycas, Thomas K. Allison, Peter G. Schunemann, Scott B. Papp, and Scott A. Diddams, "Molecular fingerprinting with bright, broadband infrared frequency combs," Optica 5, 727-732 (2018).听 听
G. Ycas, F. R. Giorgetta, E. Baumann, I. Coddington, D. Herman, S. A. Diddams, and N. R. Newbury, 鈥淗igh Coherence Mid-Infrared Dual Comb Spectroscopy Spanning 2.6 to 5.2 microns,鈥澨�Nature Photonics听12, 202鈥�208 (2018).听听
D. C. Heinecke, A. Bartels, T. M. Fortier, D. A. Braje, L. Hollberg, and S. A. Diddams,听听鈥淥ptical frequency stabilization of a 10 GHz Ti:sapphire frequency comb by saturated absorption spectroscopy in听87Rubidium,鈥� Phys. Rev. A 80, 053806 (2009).听
S. Diddams, L. Hollberg, and V. Mbele, 鈥淢olecular fingerprinting with spectrally-resolved modes of a femtosecond laser frequency comb,鈥� Nature 445, 627 (2007).听
V. Gerginov, C.E. Tanner, S.A. Diddams, A. Bartels, and L. Hollberg, 鈥淗igh resolution spectroscopy with a femtosecond laser frequency comb,鈥� Opt Lett听听30, 1734 (2005).听
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Precision Astronomical Spectroscopy听
A. J. Metcalf, et al., "Stellar spectroscopy in the near-infrared with a laser frequency comb," Optica鈥�6, 233-239 (2019).听 听
M.-G. Suh, et al., "Searching for Exoplanets Using a Microresonator Astrocomb", Nature Photonics鈥�13,鈥�25鈥�30鈥�(2019).听 听
X. Yi, K. Vahala, J. Li, S. Diddams, G. Ycas, P. Plavchan, S. Leifer, J. Sandhu, G. Vasisht, P. Chen, P. Gao, J. Gagne, E. Furlan, M. Bottom, E. C. Martin, M. P. Fitzgerald, G. Doppmann & C. Beichman, "Demonstration of a near-IR line-referenced electro-optical laser frequency comb for precision radial velocity measurements in astronomy." Nature Communications 7, 10436 (2016)听
G.G. Ycas, F. Quinlan, S.A. Diddams, S. Osterman, C. Bender, B. Botzer, L. Ramsey, R. Terrien, S. Mahadevan, and S. Redman, 鈥淒emonstration of on-sky calibration of astronomical spectra using a 25 GHz near-IR laser frequency comb,鈥� Opt. Express 20, 6631 (2012).听
F. Quinlan, G. Ycas, S. Osterman, and S.A. Diddams, 鈥淎 12.5 GHz-Spaced Optical Frequency Comb Spanning >400 nm for Infrared Astronomical Spectrograph Calibration,鈥� Rev. Sci. Inst. 81, 063105 (2010).听
D. Braje, M. Kirchner, S. Osterman, T. Fortier, S.A. Diddams, 鈥淎stronomical spectrograph calibration with broad-spectrum frequency combs,鈥澨� Eur. Phys. J. D 48, 57 (2008).听
S. Osterman, S. Diddams, M. Beasley, C. Froning, L. Hollberg, P. MacQueen, V. Mbele, A. Weiner, 鈥淎 proposed laser frequency comb based wavelength reference for high resolution spectroscopy鈥�, in Techniques and Instrumentation for Detection of Exosolar Planets III, D. R. Coulter (ed) Proc. of SPIE Vol. 6693, 66931G (2007).听
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Ultrafast, Nonlinear & Integrated Photonics听听
D.M.B. Lesko, K.F. Chang, S.A. Diddams, 鈥淗igh-sensitivity frequency comb carrier-envelope-phase metrology in solid state high harmonic generation鈥� Optica 9, 1156-1162 (2022) 听
J. Guo, et al., 鈥淐hip-Based Laser with 1 Hertz Integrated Linewidth鈥� Science Advances, 8 (43), eabp9006 (2022) 听