https://christophergbaker.com/publications/https://christophergbaker.com/wp-content/uploads/2025/04/screenshot-2025-04-19-at-10.11.00e280afam.pngSoliton fissionhttps://christophergbaker.com/wp-content/uploads/2017/09/acoustic-directional-emission-3056792388-e1704350325906.pngacoustic-directional-emissionhttps://christophergbaker.com/wp-content/uploads/2022/08/entropic-forces.pngentropic forceshttps://christophergbaker.com/wp-content/uploads/2022/08/cryogenic-and-hermetically-sealed-packaging-of-photonic-chips-for-optomechanics.pngCryogenic and hermetically sealed packaging of photonic chips for optomechanicshttps://christophergbaker.com/wp-content/uploads/2022/06/scalable-nanomechanical-logic-gate.pngScalable nanomechanical logic gatehttps://christophergbaker.com/wp-content/uploads/2021/06/cover-image.pngcover-imageElectro-Optomechanical Modulation Instability in a Semiconductor Resonator, Phys. Rev. Lett. 126, 243901 (2021).https://christophergbaker.com/wp-content/uploads/2021/06/medium.pngmediumhttps://christophergbaker.com/wp-content/uploads/2021/05/tunneling_acoustic_waves-e1621336879384.pngtunneling_acoustic_waveshttps://christophergbaker.com/wp-content/uploads/2021/05/superfluid_phononic_crystal.pngSuperfluid_phononic_crystalhttps://christophergbaker.com/wp-content/uploads/2021/03/er_doped_double_disks_pra.pngEr_doped_double_disks_PRA2026-03-27T07:37:06+00:00weekly0.6https://christophergbaker.com/news/https://christophergbaker.com/wp-content/uploads/2025/11/1753067435674-1.jpg1753067435674https://christophergbaker.com/wp-content/uploads/2025/11/1753067435674.jpg1753067435674https://christophergbaker.com/wp-content/uploads/2023/12/anzos-postgraduate-student-prize.jpeganzos-postgraduate-student-prizehttps://christophergbaker.com/wp-content/uploads/2023/12/acoustic-directional-emission.pngacoustic-directional-emissionhttps://christophergbaker.com/wp-content/uploads/2023/10/221216-aip-congress-plenary-5-3422.jpg221216-AIP-Congress-Plenary-5-3422https://christophergbaker.com/wp-content/uploads/2022/08/scalable_nanomechanical_logic_gate.pngScalable_nanomechanical_logic_gatehttps://christophergbaker.com/wp-content/uploads/2022/08/superfluid-sbs.pngSuperfluid SBShttps://christophergbaker.com/wp-content/uploads/2022/08/cavity-optomechanics_brillouin_2.pngCavity optomechanics_Brillouin_2https://christophergbaker.com/wp-content/uploads/2022/08/cavity-optomechanics_brillouin_1.pngCavity optomechanics_Brillouin_1https://christophergbaker.com/wp-content/uploads/2020/07/uq_raymond-harrison_sq.jpgUQ_Raymond-Harrison_sq2025-11-10T05:14:42+00:00weekly0.6https://christophergbaker.com/superfluid-optomechanics/https://christophergbaker.com/wp-content/uploads/2025/04/soliton_fission_third_sound.gifSoliton_fission_third_soundhttps://christophergbaker.com/wp-content/uploads/2025/04/soliton_fission_large_scale.gifSoliton_fission_large_scalehttps://christophergbaker.com/wp-content/uploads/2025/04/soliton_fission.gifSoliton_fissionhttps://christophergbaker.com/wp-content/uploads/2025/04/soliton_fission_gravity_wave.gifSoliton_fission_gravity_wavehttps://christophergbaker.com/wp-content/uploads/2025/04/screenshot-2025-04-22-at-7.30.59e280afpm.pngSuperfluid wave flume(A) Landscape of terrestrial shallow wave phenomena and flumes. Conventional wave tanks and flumes cluster in a small region of size and addressable Ursell number, far from extreme terrestrial flows (12). Superfluid-based approaches open up a significantly broader parameter space (see Supplementary Materials, Section 1.1). (B) False color scanning electron microscope image, showing the silicon wave flume (blue) addressed by an optical fiber taper (gray). Width and thickness (220 nm) being well below its length L, the device functions effectively as a one-dimensional channel (i.e. a wave flume). Top left inset: Photonic crystal cavity. (C) Illustration of the wave flume, including its fundamental sloshing mode. (D) Finite element simulation of the cavity optical mode at ∼ 1598 nm wavelength. The evanescent component extending outside the cavity senses superfluid wave motion, shown here with exaggerated amplitude (white line).https://christophergbaker.com/wp-content/uploads/2025/04/screenshot-2025-04-22-at-7.31.40e280afpm.pngMulti-soliton fission(A) Observation of multisoliton fission, superimposed over a sinusoidal modulation at the drive frequency with amplitude H = 1.5 nm (dashed red line). (B) Corrected experimental data, with sinusoidal background subtracted. (C) Custom Euler model. (D) Third sound KdV solution obtained using Eq. (1). (E) Gravity wave KdV solution obtained using Eq. (1), with reversed nonlinear coefficient α.https://christophergbaker.com/wp-content/uploads/2025/04/screenshot-2025-04-22-at-7.30.42e280afpm.pngBackwards-leaning waves(A) i: In conventional hydrodynamics wave crests move faster than troughs (red arrows), leading to forward-leaning waves. ii: forward-leaning waves as observed by a stationary gauge. iii&iv: reverse behavior is predicted for superfluid third sound waves due to their different effective gravity. (B) Laser drive used to initialize and readout large- amplitude third sound waves. Mean laser power is kept constant to avoid unwanted thermal drift (see Supplementary Materials, Section 2.2). (C) Photodetector voltage measured during wave initialization and readout. (D) Calibrated measurement of wave amplitude versus time, for the section of the ringdown highlighted in (C). https://christophergbaker.com/wp-content/uploads/2025/04/screenshot-2025-04-22-at-7.31.15e280afpm.pngSuperfluid dispersive shock fronts(A) Observation of dispersive shock fronts. Red arrows: signatures of soliton fission. (B) Custom Euler model, including counter-propagation and van der Waals nonlinearities, obtained by evolving a sinusoidal wave initialized with am- plitude H = 0.1h (with computation taking ∼ 4 days on a desktop PC). More details: Supple- mentary Materials, Section 5. (C) KdV solution obtained using Eq. (1).https://christophergbaker.com/wp-content/uploads/2025/04/screenshot-2025-04-22-at-7.26.55e280afpm.pngScreenshot 2025-04-22 at 7.26.55 PMhttps://christophergbaker.com/wp-content/uploads/2025/04/screenshot-2025-04-22-at-7.21.04e280afpm.pngScreenshot 2025-04-22 at 7.21.04 PM2025-11-10T04:53:57+00:00weekly0.6https://christophergbaker.com/talks/2024-07-30T06:46:12+00:00weekly0.6https://christophergbaker.com/tuning-of-optical-microcavities/https://christophergbaker.com/wp-content/uploads/2021/01/tunable_photoluminescence_2.pngtunable_photoluminescence_2https://christophergbaker.com/wp-content/uploads/2021/01/erbium_doped_double_disk2.pngerbium_doped_double_disk2https://christophergbaker.com/wp-content/uploads/2021/01/erbium_doped_double_disk.pngerbium_doped_double_diskhttps://christophergbaker.com/wp-content/uploads/2019/12/test_v4-e1578622042257.pngCascaded_optomechanical_resonators_cropped“Light-Mediated Cascaded Locking of Multiple Nano-Optomechanical Oscillators,” [PRL, 118, 063605, 2017]https://christophergbaker.com/wp-content/uploads/2019/12/coems_microscope-e1578621930138.jpgcoems_microscope_cropped“High bandwidth on-chip capacitive tuning of microtoroid resonators,” [Optics Express, 24, 20400, 2016].https://christophergbaker.com/wp-content/uploads/2020/01/capacitive_actuation_wgm.pngcapacitive_actuation_WGMhttps://christophergbaker.com/wp-content/uploads/2019/12/dissimilar_wgm_resonators.jpgdissimilar_WGM_resonatorsTwo resonators of different size positioned alongside a common waveguide.https://christophergbaker.com/wp-content/uploads/2019/12/add_drop_filter.jpgadd_drop_filterWGM Add drop filterhttps://christophergbaker.com/wp-content/uploads/2019/12/wgm_spectrum.jpgWGM_spectrumLeft: geometric optics representation of a WGM with resonance condition; Middle: Field distribution; WGM resonator spectrum, showing a discrete set of resonances separated by a free spectral range.https://christophergbaker.com/wp-content/uploads/2019/12/picture1.jpgPicture12021-07-12T05:32:52+00:00weekly0.6https://christophergbaker.com/gallery/https://christophergbaker.com/wp-content/uploads/2021/07/phononic_mode5.gifphononic_mode5Superfluid third sound mode confined to an acoustic phononic crystal defect.https://christophergbaker.com/wp-content/uploads/2020/11/ccw_third_sound2.gifCCW_third_sound2https://christophergbaker.com/wp-content/uploads/2020/11/ccw_third_sound.gifCCW_third_soundhttps://christophergbaker.com/wp-content/uploads/2020/11/untitled.gifUntitledhttps://christophergbaker.com/wp-content/uploads/2020/11/20190827_112158.jpg20190827_112158Dilution refrigerator for superfluid experimentshttps://christophergbaker.com/wp-content/uploads/2020/03/2015-03-25_12-01-20-ma-r5-s2.png2015-03-25_12-01-20 M=A R=5 S=2Slotted microtoroid. From “High bandwidth on-chip capacitive tuning of microtoroid resonators,” [Optics Express, 24, 20400, 2016].https://christophergbaker.com/wp-content/uploads/2020/01/wgm-resonators-with-integrated-waveguides.jpgWGM resonators with integrated waveguidesWGM optomechanical resonators with integrated coupling waveguides and inverted tapers.https://christophergbaker.com/wp-content/uploads/2020/01/locking-of-optomechanical-resonators.jpglocking of optomechanical resonators“Light-Mediated Cascaded Locking of Multiple Nano-Optomechanical Oscillators,” [PRL, 118, 063605, 2017]https://christophergbaker.com/wp-content/uploads/2020/01/photonic-crystal2.pngPhotonic crystalPhotonic crystalhttps://christophergbaker.com/wp-content/uploads/2020/01/soi-grating-coupler-2.pngSOI grating couplerSOI grating coupler2021-07-06T01:31:12+00:00weekly0.6https://christophergbaker.com/phononics/https://christophergbaker.com/wp-content/uploads/2021/04/on-chip-acoustic-waveguides-and-tunnel-barriers-1.jpgOn-chip acoustic waveguides and tunnel barriershttps://christophergbaker.com/wp-content/uploads/2021/01/capture_phononics2.jpgCapture_phononics2https://christophergbaker.com/wp-content/uploads/2020/11/picture1.pngpicture12021-04-06T11:56:39+00:00weekly0.6https://christophergbaker.com/research-themes/https://christophergbaker.com/wp-content/uploads/2019/08/thumbnail_20200715_1143062-e1617685866398.jpgthumbnail_20200715_1143062https://christophergbaker.com/wp-content/uploads/2020/01/clockwise_sound.gifClockwise third sound modeClockwise rotating superfluid third sound modehttps://christophergbaker.com/wp-content/uploads/2020/01/counter_clockwise_sound.gifCounter_clockwise_soundCounter-clockwise rotating third sound mode2021-04-06T05:14:39+00:00weekly0.6https://christophergbaker.com/optomechanics-nanomechanics-nanofluidics/https://christophergbaker.com/wp-content/uploads/2020/11/capture_high_frequency_optomechanical_resonators_liquids_1.jpgCapture_high_frequency_optomechanical_resonators_liquids_1Operation of nano-optomechanical disks in a liquid.https://christophergbaker.com/wp-content/uploads/2020/11/capture_high_frequency_optomechanical_resonators_liquids_2.jpgCapture_high_frequency_optomechanical_resonators_liquids_2Dissipative and dispersive fluid–structure interactions measured by nano-optomechanical means.https://christophergbaker.com/wp-content/uploads/2020/11/capture_high_frequency_optomechanical_resonators_liquids_3.jpgCapture_high_frequency_optomechanical_resonators_liquids_3Viscous regime models.https://christophergbaker.com/wp-content/uploads/2020/11/capture_high_frequency_optomechanical_resonators_liquids_4.jpgCapture_high_frequency_optomechanical_resonators_liquids_4Acoustic regime models.https://christophergbaker.com/wp-content/uploads/2020/11/capture_high_frequency_optomechanical_resonators_liquids_5.jpgCapture_high_frequency_optomechanical_resonators_liquids_5Interpretation of nano-optomechanical experiments in liquids.https://christophergbaker.com/wp-content/uploads/2020/03/liquid_version11.jpgliquid_version11https://christophergbaker.com/wp-content/uploads/2020/03/liquid2.pngliquid2https://christophergbaker.com/wp-content/uploads/2020/11/gaas_microdisk.jpgGaAs_microdiskhttps://christophergbaker.com/wp-content/uploads/2020/03/image78.gifimage78https://christophergbaker.com/wp-content/uploads/2020/03/captureoe_oisp2-e1605590154607.pngcaptureoe_oisp22020-11-24T06:18:51+00:00weekly0.6https://christophergbaker.com/fabry-perot-optomechanical-cavity/2020-11-24T06:01:43+00:00weekly0.6https://christophergbaker.com/rendering-liquids-in-blender/https://christophergbaker.com/wp-content/uploads/2018/05/just_a_refraction.jpgjust_a_refractionRefraction in a glass of water. Source: https://en.wikipedia.org/wiki/Refractionhttps://christophergbaker.com/wp-content/uploads/2018/05/liquids_cycles_render.jpgliquids_cycles_renderLiquid with Cycles renderhttps://christophergbaker.com/wp-content/uploads/2018/05/animation_settings.jpganimation_settingsAnimation settingshttps://christophergbaker.com/wp-content/uploads/2018/05/modifier_frame-number.jpgModifier_frame numberModifier application and frame number selectionhttps://christophergbaker.com/wp-content/uploads/2018/05/simulation-running1.jpgSimulation runningSimulation runninghttps://christophergbaker.com/wp-content/uploads/2018/05/fluid_setting2.jpgfluid_setting2https://christophergbaker.com/wp-content/uploads/2018/05/simulation-running.jpgSimulation runningSimulation runninghttps://christophergbaker.com/wp-content/uploads/2018/05/frame_selection1.jpgFrame_selection1Frame selection 1https://christophergbaker.com/wp-content/uploads/2018/05/frame_selection2.jpgFrame_selection2Frame selection 2https://christophergbaker.com/wp-content/uploads/2018/05/frame_selection3.jpgFrame_selection3Frame selection 32020-11-19T01:39:10+00:00weekly0.6https://christophergbaker.com/cascaded-coupled-resonators/2020-11-11T07:15:06+00:00weekly0.6https://christophergbaker.com/blender-3d/https://christophergbaker.com/wp-content/uploads/2020/01/vortex-in-glass-of-water.jpgvortex in glass of water"Coherent vortex dynamics in a strongly interacting superfluid on a silicon chip" [Science, vol. 366, 6472, p. 1480, Dec 2019]https://christophergbaker.com/wp-content/uploads/2019/09/spring_animation.gifspring_animationMirror on spring animationhttps://christophergbaker.com/wp-content/uploads/2019/08/cascaded-coupled-resonators.jpgcascaded coupled resonatorshttps://christophergbaker.com/wp-content/uploads/2018/05/pec.jpgPEChttps://christophergbaker.com/wp-content/uploads/2018/03/mesa_synchroinsert.jpgmesa_synchroinserthttps://christophergbaker.com/wp-content/uploads/2018/03/depth10_render.jpgdepth10_renderDepth 10https://christophergbaker.com/wp-content/uploads/2018/03/depth2_render.jpgdepth2_renderDepth 2https://christophergbaker.com/wp-content/uploads/2018/03/node-editor.jpgnode editorNode editor and compositing node tree selectionhttps://christophergbaker.com/wp-content/uploads/2018/03/rendering-settings.jpgrendering settingsrendering settingshttps://christophergbaker.com/wp-content/uploads/2018/03/depth2.jpgdepth22020-11-11T07:11:32+00:00weekly0.6https://christophergbaker.com/optomechanical-crystal/2020-11-11T07:06:11+00:00weekly0.6https://christophergbaker.com/cavity-optoelectromechanics/2020-06-19T05:16:26+00:00weekly0.6https://christophergbaker.com/brillouin-scattering-animation/https://christophergbaker.com/wp-content/uploads/2020/03/wgm2.jpgWGM2https://christophergbaker.com/wp-content/uploads/2020/03/wgm3-1.jpgWGM3https://christophergbaker.com/wp-content/uploads/2020/03/wgm4.jpgWGM4https://christophergbaker.com/wp-content/uploads/2020/03/wgm5.jpgWGM5https://christophergbaker.com/wp-content/uploads/2020/03/wgm6.jpgWGM6https://christophergbaker.com/wp-content/uploads/2020/03/displace-modifier-1.pngdisplace modifier 1https://christophergbaker.com/wp-content/uploads/2020/03/displace-modifier-2.pngdisplace modifier 2https://christophergbaker.com/wp-content/uploads/2020/03/smooth-union-remesh.pngsmooth union remeshhttps://christophergbaker.com/wp-content/uploads/2020/03/modifier_settings-1.pngmodifier_settingshttps://christophergbaker.com/wp-content/uploads/2020/03/brillouin_lasing.jpgBrillouin_lasing“Strong optical coupling through superfluid Brillouin lasing,”Nature Physics (2020). https://doi.org/10.1038/s41567-020-0785-02020-04-01T23:46:44+00:00weekly0.6https://christophergbaker.com/microsphere-resonator/2020-03-09T04:18:05+00:00weekly0.6https://christophergbaker.com/integrated-waveguides-with-inverted-tapers/https://christophergbaker.com/wp-content/uploads/2018/05/test4.pngtest42020-03-07T11:07:55+00:00weekly0.6https://christophergbaker.com/page/https://christophergbaker.com/wp-content/uploads/2017/09/picture1-e1583236425331.pngpicture1https://christophergbaker.com/wp-content/uploads/2020/03/superfluid-optomechanics-2.jpgsuperfluid optomechanicshttps://christophergbaker.com/wp-content/uploads/2018/06/blender_ddisk_2.pngblender_ddisk_2https://christophergbaker.com/wp-content/uploads/2018/06/blender_ddisk_1-e1527997084608.pngblender_ddisk_1https://christophergbaker.com/wp-content/uploads/2017/09/photography-349870_19201.jpgPlaceholder 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Image2020-02-24T02:20:02+00:00weekly0.6https://christophergbaker.com/vortex-in-a-glass/2020-01-28T04:18:17+00:00weekly0.6https://christophergbaker.com/quantized-vortices-in-superfluid/2020-01-28T04:15:48+00:00weekly0.6https://christophergbaker.com/electrically-tunable-double-disk-resonator/2020-01-28T04:09:25+00:00weekly0.6https://christophergbaker.com/superfluid-optomechanical-resonator/https://christophergbaker.com/wp-content/uploads/2018/07/v12_raw-e1532049641458.jpgv12_raw2020-01-28T04:03:35+00:00weekly0.6https://christophergbaker.com/photoelectrochemical-tuning-of-resonators/2020-01-28T02:19:25+00:00weekly0.6https://christophergbaker.com/home-2/2019-10-21T07:09:42+00:00weekly0.6https://christophergbaker.com/mirror-on-spring-animation/https://christophergbaker.com/wp-content/uploads/2019/10/output.jpgoutputhttps://christophergbaker.com/wp-content/uploads/2019/10/spring_frame30.jpgspring_frame30Frame 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geometryhttps://christophergbaker.com/wp-content/uploads/2018/05/depth-transparency.jpgdepth transparency2018-07-21T07:08:48+00:00weekly0.6https://christophergbaker.com/cavity-optoelectromechanical-system/2018-05-11T22:56:03+00:00weekly0.6https://christophergbaker.com/testimonial/a-big-fan-of-yours-2/https://christophergbaker.com/wp-content/uploads/2017/09/apple-iphone-books-desk.jpgPlaceholder Image2017-09-17T07:58:45+00:00monthlyhttps://christophergbaker.com/testimonial/a-big-fan-of-yours/https://christophergbaker.com/wp-content/uploads/2017/09/eruc3psrzhy-jamie-street.jpgPlaceholder Image2017-09-17T07:58:45+00:00monthlyhttps://christophergbaker.com/about/https://christophergbaker.com/wp-content/uploads/2017/09/lljpxsf3gbe-nick-turner.jpgPlaceholder 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