Professional Education


  • Bachelor of Science, Peking University, Physics (2014)
  • Doctor of Philosophy, Princeton University, Electrical Engineering (2019)

Stanford Advisors


All Publications


  • Inverse-designed photonic fibers and metasurfaces for nonlinear frequency conversion (vol 6, pg B82, 2018) PHOTONICS RESEARCH Sitawarin, C., Jin, W., Lin, Z., Rodriguez, A. W. 2019; 7 (4): 493
  • Material scaling and frequency-selective enhancement of near-field radiative heat transfer for lossy metals in two dimensions via inverse design PHYSICAL REVIEW B Jin, W., Molesky, S., Lin, Z., Rodriguez, A. W. 2019; 99 (4)
  • 400%/W second harmonic conversion efficiency in 14 mu m-diameter gallium phosphide-on-oxide resonators OPTICS EXPRESS Logan, A. D., Gould, M., Schmidgall, E. R., Hestroffer, K., Lin, Z., Jin, W., Majumdar, A., Hatami, F., Rodriguez, A. W., Fu, K. C. 2018; 26 (26): 33687–99

    Abstract

    Second harmonic conversion from 1550 nm to 775 nm with an efficiency of 400% W-1 is demonstrated in a gallium phosphide (GaP) on oxide integrated photonic platform. The platform consists of doubly-resonant, phase-matched ring resonators with quality factors Q ∼ 104, low mode volumes V ∼ 30(λ/n)3, and high nonlinear mode overlaps. Measurements and simulations indicate that conversion efficiencies can be increased by a factor of 20 by improving the waveguide-cavity coupling to achieve critical coupling in current devices.

    View details for DOI 10.1364/OE.26.033687

    View details for Web of Science ID 000454149000018

    View details for PubMedID 30650802

  • Inverse design in nanophotonics NATURE PHOTONICS Molesky, S., Lin, Z., Piggott, A. Y., Jin, W., Vuckovic, J., Rodriguez, A. W. 2018; 12 (11): 659–70
  • Inverse design of compact multimode cavity couplers OPTICS EXPRESS Jin, W., Molesky, S., Lin, Z., Fu, K. C., Rodriguez, A. W. 2018; 26 (20): 26713–21

    Abstract

    Efficient coupling between on-chip sources and cavities plays a key role in silicon photonics. However, despite the importance of this basic functionality, there are few systematic design tools to simultaneously control coupling between multiple modes in a compact resonator and a single waveguide. Here, we propose a large-scale adjoint optimization approach to produce wavelength-scale waveguide-cavity couplers operating over tunable and broad frequency bands. We numerically demonstrate couplers discovered by this method that can achieve critical, or nearly critical, coupling between multi-ring cavities and a single waveguide at up to six widely separated wavelengths spanning the 560-1500 nm range of interest for on-chip nonlinear optical devices.

    View details for DOI 10.1364/OE.26.026713

    View details for Web of Science ID 000446055500101

    View details for PubMedID 30469752

  • Inverse-designed photonic fibers and metasurfaces for nonlinear frequency conversion [Invited] PHOTONICS RESEARCH Sitawarin, C., Jin, W., Lin, Z., Rodriguez, A. W. 2018; 6 (5): B82–B89
  • Enhanced nonlinear frequency conversion and Purcell enhancement at exceptional points PHYSICAL REVIEW B Pick, A., Lin, Z., Jin, W., Rodriguez, A. W. 2017; 96 (22)
  • Overcoming limits to near-field radiative heat transfer in uniform planar media through multilayer optimization OPTICS EXPRESS Jin, W., Messina, R., Rodriguez, A. W. 2017; 25 (13): 14746–59

    Abstract

    Radiative heat transfer between uniform plates is bounded by the narrow range and limited contribution of surface waves. Using a combination of analytical calculations and numerical gradient-based optimization, we show that such a limitation can be overcome in complicated multilayer geometries, allowing the scattering and coupling rates of slab resonances to be altered over a broad range of evanescent wavevectors. We conclude that while the radiative flux between two inhomogeneous slabs can only be weakly enhanced, the flux between a dipolar particle and an inhomogeneous slab-proportional to the local density of states-can be orders of magnitude larger, albeit at the expense of increased frequency selectivity. A brief discussion of hyperbolic metamaterials shows that they provide far less enhancement than optimized inhomogeneous slabs.

    View details for DOI 10.1364/OE.25.014746

    View details for Web of Science ID 000404189800077

    View details for PubMedID 28789058

  • General formulation of coupled radiative and conductive heat transfer between compact bodies PHYSICAL REVIEW B Jin, W., Messina, R., Rodriguez, A. W. 2017; 95 (16)
  • Near-Field Radiative Heat Transfer under Temperature Gradients and Conductive Transfer ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES Jin, W., Messina, R., Rodriguez, A. W. 2017; 72 (2): 141–49
  • Topology optimization in nonlinear nanophotonics: from frequency conversion to exceptional points Lin, Z., Jin, W., Pick, A., Johnson, S. G., Mazur, E., Loncar, M., Rodriguez, A. W., IEEE IEEE. 2017
  • Exact formulas for radiative heat transfer between planar bodies under arbitrary temperature profiles: Modified asymptotics and sign-flip transitions PHYSICAL REVIEW B Messina, R., Jin, W., Rodriguez, A. W. 2016; 94 (20)
  • Measuring the Charge of a Single Dielectric Nanoparticle Using a High-Q Optical Microresonator PHYSICAL REVIEW APPLIED Chen, Y., Jin, W., Xiao, Y., Zhang, X. 2016; 6 (4)
  • Strongly coupled near-field radiative and conductive heat transfer between planar bodies PHYSICAL REVIEW B Messina, R., Jin, W., Rodriguez, A. W. 2016; 94 (12)
  • Giant frequency-selective near-field energy transfer in active-passive structures PHYSICAL REVIEW B Khandekar, C., Jin, W., Miller, O. D., Pick, A., Rodriguez, A. W. 2016; 94 (11)
  • Temperature control of thermal radiation from composite bodies PHYSICAL REVIEW B Jin, W., Polimeridis, A. G., Rodriguez, A. W. 2016; 93 (12)
  • Amplified and directional spontaneous emission from arbitrary composite bodies: A self-consistent treatment of Purcell effect below threshold PHYSICAL REVIEW B Jin, W., Khandekar, C., Pick, A., Polimeridis, A. G., Rodriguez, A. W. 2016; 93 (12)
  • Fluctuating volume-current formulation of electromagnetic fluctuations in inhomogeneous media: Incandescence and luminescence in arbitrary geometries PHYSICAL REVIEW B Polimeridis, A. G., Reid, M. H., Jin, W., Johnson, S. G., White, J. K., Rodriguez, A. W. 2015; 92 (13)
  • Enhanced Raman scattering of single nanoparticles in a high- Q whispering-gallery microresonator PHYSICAL REVIEW A Liu, R., Jin, W., Yu, X., Liu, Y., Xiao, Y. 2015; 91 (4)
  • Optimizing detection limits in whispering gallery mode biosensing OPTICS EXPRESS Foreman, M. R., Jin, W., Vollmer, F. 2014; 22 (5): 5491–5511

    Abstract

    A theoretical analysis of detection limits in swept-frequency whispering gallery mode biosensing modalities is presented based on application of the Cramér-Rao lower bound. Measurement acuity factors are derived assuming the presence of uncoloured and 1/ f Gaussian technical noise. Frequency fluctuations, for example arising from laser jitter or thermorefractive noise, are also considered. Determination of acuity factors for arbitrary coloured noise by means of the asymptotic Fisher information matrix is highlighted. Quantification and comparison of detection sensitivity for both resonance shift and broadening sensing modalities are subsequently given. Optimal cavity and coupling geometries are furthermore identified, whereby it is found that slightly under-coupled cavities outperform critically and over coupled ones.

    View details for DOI 10.1364/OE.22.005491

    View details for Web of Science ID 000333579200106

    View details for PubMedID 24663890

  • Dissipative optomechanical coupling between a single-wall carbon nanotube and a high-Q microcavity PHYSICAL REVIEW A Yan, M., Li, H., Liu, Y., Jin, W., Xiao, Y. 2013; 88 (2)
  • Temperature-insensitive detection of low-concentration nanoparticles using a functionalized high-Q microcavity APPLIED OPTICS Jin, W., Yi, X., Hu, Y., Li, B., Xiao, Y. 2013; 52 (2): 155–61

    Abstract

    The ability to detect nanoparticles in extremely dilute solutions in the presence of environmental noise is crucial for biosensing applications. In this paper we propose a scheme for detecting target nanoparticles through their scattering effects in a high-Q whispering gallery microcavity. The detection signal, defined as the total linewidth broadening of the two new split modes that appear upon nanoparticle adsorption, is highly sensitive and proportional to the nanoparticle concentration. Furthermore, this new method of detection eliminates the requirement for strict temperature control and is capable of distinguishing the signal from the biorecognitions (e.g., antibodies) initially attached to the resonator and that from the target nanoparticles (e.g., antigens).

    View details for DOI 10.1364/AO.52.000155

    View details for Web of Science ID 000313746100006

    View details for PubMedID 23314630

  • Coupling of diamond nanocrystals to a high-Q whispering-gallery microresonator PHYSICAL REVIEW A Yu, X., Liu, Y., Yan, M., Jin, W., Xiao, Y. 2012; 86 (4)