1. Haomin Wang, Le Wang, Yuequn Shang, Ivan Biaggio, Zhijun Ning, and Xiaoji G. Xu  “Peak Force Visible Microscopy for Determination of Exciton Diffusion Length in Organic Photovoltaic Blends” Submitted.

2. Devon S. Jakob, Le Wang, Haomin Wang, and Xiaoji G. Xu  “Spectro-mechanical Characterization of Aromaticity and Maturity of Kerogens in Oil Shale at 6 nm Spatial Resolution” Submitted.

Publications since 2015 

(Representative works marked by *)

26*. Martin Wagner, Devon S. Jakob, Steve Horne, Henry Mittel, Sergey Osechinskiy, Cassandra Phillips, Gilbert C. Walker, Chanmin Su and Xiaoji G. Xu “Ultra-broadband Nano-spectroscopy with a Laser-driven Plasma Source” ACS Photonics, 5, 4, 1467 (2018)

25. Jian-Hua Jiang, Xiaoji G. Xu, Leonid Gilburd, and Gilbert C. Walker “Optical hot-spots in boron-nitride nanotubes at mid infrared frequencies: one-dimensional localization due to random-scattering” Optics Express  25, 25059 (2017)

24*. Le Wang, Dandan Huang, Chak K. Chan, Yong Jie Li, and Xiaoji G. Xu “Nanoscale spectroscopic and mechanical characterization of individual aerosol particles using peak force infrared microscopy” Chemical Communications  53, 7397 (2017)  (ChemComm Emerging Investigators issue 2017)

23*.  Le Wang, Haomin Wang, Martin Wagner, Yong Yan, Devon S. Jakob and Xiaoji G. Xu “Nanoscale Simultaneous Chemical and Mechanical Imaging via Peak Force Infrared Microscopy” Science Advances 3, e1700255 (2017)

22. Haomin Wang, Le Wang, Devon S. Jakob, and Xiaoji G. Xu “Mapping three-dimensional near-field responses with reconstruction scattering-type scanning near-field optical microscopy” AIP Advances 7, 055118 (2017)

21*. Haomin Wang, Le Wang and Xiaoji G. Xu “Scattering-type Scanning Near-field Optical Microscopy with Low Repetition Rate Pulsed Light Source through Phase-domain Sampling”  Nature Communications 7:13212 (2016)

20. Xiaoji G. Xu, Leonid Gilburd, Yoshio. Bando, Dmitri Golberg and Gilbert C. Walker, “Defects and Deformation of Boron Nitride Nanotubes Studied by Joint Nanoscale Mechanical and Infrared Near-Field Microscopy” The Journal of Physical Chemistry C 120 (3), 1945,  (2016).

19. Leonid Gilburd, Xiaoji G. Xu, Yoshio Bando, Dmitri Golberg and Gilbert C. Walker, “Near-Field Infrared Pump–Probe Imaging of Surface Phonon Coupling in Boron Nitride Nanotubes” Journal of Physical Chemistry Letters  7 (2) 289 (2016)

18. Le Wang and Xiaoji G. Xu “Scattering Type Scanning Near-field Optical Microscopy with Reconstruction of Vertical Interaction”  Nature Communications 6:8973  (2015).

Publications 2007-2014

17*. X. G. Xu, L. Gilburd, and G. C Walker  “Phase Stabilized Homodyne of Infrared Scattering Type Scanning Near-field Optical Microscopy”  Applied Physics Letters 105 (26), 263104 2014

16. X. G. Xu, J-H. Jiang, L. Gilburd, C. Zhi, Y. Bando, D. Golberg, and G. C Walker  “Mid-Infrared Polaritonic Coupling between Boron Nitride Nanotubes and Graphene” ACS Nano, 8 (11) 11305 2014

15. B. G. Ghamsari,  X.G. Xu,  L. Gilburd,  and G. C Walker, P. Berini,  “Mid-infrared surface phonon polaritons in boron-nitride nanotubes” Journal of Optics 16 (11) 114008, 2014

14. H. U. Yang, R. L. Olmon, K. S. Deryckx, X. G. Xu, H. A. Bechtel, Y. Xu, B. A. Lail and M. B. Raschke, Accessing the Optical Magnetic Near-Field through Babinet’s Principle  ACS Photonics, 1, 894. 2014

13*. X. G. Xu, B. G. Ghamsari, J-H. Jiang L. Gilburd, G. O. Andreev, C. Zhi, Y. Bando, D. Golberg, P. Berini, and G. C Walker  “One-dimensional surface phonon polaritons in boron nitride nanotubes” Nature Communications, 5:4782 2014 (high-lighted in Nature Materials 13, 1081–1083 2014)

12. X. G. Xu, A. E. Tanur, and G. C. Walker “Phase Controlled Homodyne Infrared Near- field Microscopy Reveal Inhomogeneity within and among Individual Boron Nitride Nanotubes ” Journal of Physical Chemistry A 117 (16), 3348, 2013 (featured in cover)

11. S. Pirotta, X. G. Xu; A. Delfan, S. Mysore, S. Maiti, G. Dacarro, M. Patrini, M. Galli, G. Guizzetti, D. Bajoni, J. Sipe, G. C. Walker, and M. Liscidini “Surface Enhanced Raman Scattering in Purely Dielectric Structures via Bloch Surface Waves” Journal of Physical Chemistry C 117 (13), 6821, 2013

10. X. G. Xu, and M. B. Raschke “Near-field Infrared Vibrational Dynamics and Tip-Enhanced Decoherence ” Nano Letters 13 (4), 1588, 2013

9. X. G. Xu, M. Rang, I. M. Craig and M. B. Raschke “Pushing the Sample Size Limit of Infrared Vibrational Nanospectroscopy: From Monolayer towards Single Molecule Sensitivity ” Journal of Physical Chemistry Letters 3 (13), 1836, 2012

8. S. Berwerger, J. Atkins, X. G. Xu, R. L. Olmon, and M. B. Raschke “ Ultrafast nanofocusing with full optical waveform control ” Nano Letters 11 (10), 4309, 2011

7. A. Anderson†, K. S. Deryckx†, X. G. Xu†, G. Steinmeyer and M. B. Raschke “Few-Femtosecond Plasmon Dephasing of a Single Metallic Nanostructure from Optical Response Function Reconstruction by Interferometric Frequency Resolved Optical Gating” Nano Letters 10 (7), 2519, 2010 († equal contribution)

6. S. O. Konorov, X. G. Xu, J. W. Hepburn, and V. Milner.  “Characterization of transient molecular vibration excited with shaped femtosecond pulses.” Journal of Chemical Physics 130, 234505, 2009

5. S. O. Konorov, X. G. Xu, J. W. Hepburn, and V. Milner “Narrowband Spectroscopy by All-optical Correlation of Broadband pulses.” Phys. Rev. A 79, 031801 2009 (Rapid Communication)

4. X. G. Xu, S. O. Konorov, J. W. Hepburn, and V. Milner “Background-free Coherent Raman Spectroscopy by Detecting the Spectral Phase of Molecular Vibrations.” Optics Letters 33 (11): 1177-1179. 2008

3. X .G. Xu, S. O. Konorov, J. W. Hepburn, and V. Milner. “Noise autocorrelation spectroscopy with coherent Raman scattering.” Nature Physics 4(2): 125-129. 2008

2. S. O. Konorov, X. G. Xu, M. W. Blades, R. B. Turner, J. W. Hepburn, and V. Milner “Pulse optimization for Raman spectroscopy with cross-correlation frequency resolved optical gating.” Optics Express 15 (12): 7564-7571. 2007

1*. X. G. Xu, S. O. Konorov, S. Zhdanovich, J. W. Hepburn, and V. Milner. “Complete characterization of molecular vibration using frequency resolved gating.” Journal of Chemical Physics 126, 091102-5 2007 (rapid communication)