[1] Rivera N, Kaminer I. Light-matter interactions with photonic quasiparticles[J]. Nature Reviews Physics, 2, 538-561(2020).

[2] Ispirian K A, Ispiryan M K. Crystalline wigglers[J]. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 247, 377-380(2006).

[3] Afonin A G, Baranov V T, Bellucci S et al. Crystal undulator experiment at IHEP[J]. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 234, 122-127(2005).

[4] Ikehata T, Suzuki Y, Nagai R et al. A novel laser technique for constructing a plasma micro-undulator and a compact X-ray source[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 383, 605-609(1996).

[5] Andriyash I A, Lehe R, Lifschitz A et al. An ultracompact X-ray source based on a laser-plasma undulator[J]. Nature Communications, 5, 4736(2014).

[6] Tian Y, Liu J S, Bai Y F et al. Femtosecond-laser-driven wire-guided helical undulator for intense terahertz radiation[J]. Nature Photonics, 11, 242-246(2017).

[7] Rohrbach D, Schroeder C B, Pizzi A et al. THz-driven surface plasmon undulator as a compact highly directional narrow band incoherent X-ray source[J]. Physical Review Accelerators and Beams, 22, 090702(2019).

[8] Roques-Carmes C, Kooi S E, Yang Y et al. Free-electron-light interactions in nanophotonics[J]. Applied Physics Reviews, 10, 011303(2023).

[9] Ma W L, Alonso-González P, Li S J et al. In-plane anisotropic and ultra-low-loss polaritons in a natural van der Waals crystal[J]. Nature, 562, 557-562(2018).

[10] Ma W L, Hu G W, Hu D B et al. Ghost hyperbolic surface polaritons in bulk anisotropic crystals[J]. Nature, 596, 362-366(2021).

[11] Ni X, Carini G, Ma W L et al. Observation of directional leaky polaritons at anisotropic crystal interfaces[J]. Nature Communications, 14, 2845(2023).

[12] Zhang D D, Zeng Y S, Bai Y F et al. Coherent surface plasmon polariton amplification via free-electron pumping[J]. Nature, 611, 55-60(2022).

[13] Hu H, Lin X, Luo Y. Free-electron radiation engineering via structured environments[J]. Progress in Electromagnetics Research, 171, 75-88(2021).

[14] Shi X H, Wong L W W, Huang S C et al. Transverse recoil imprinted on free-electron radiation[J]. Nature Communications, 15, 7803(2024).

[15] Wong L J, Kaminer I, Ilic O et al. Towards graphene plasmon-based free-electron infrared to X-ray sources[J]. Nature Photonics, 10, 46-52(2016).

[16] Guo X D, Wu C C, Zhang S et al. Mid-infrared analogue polaritonic reversed Cherenkov radiation in natural anisotropic crystals[J]. Nature Communications, 14, 2532(2023).

[17] Álvarez-Pérez G, Folland T G, Errea I et al. Infrared permittivity of the biaxial van der waals semiconductor α- MoO3 from near- and far-field correlative studies[J]. Advanced Materials, 32, 1908176(2020).

[18] Haq B, Rahimi Vaskasi J, Zhang J et al. Micro-transfer-printed III-V-on-silicon C-band distributed feedback lasers[J]. Optics Express, 28, 32793-32801(2020).

[19] Jones R, Doussiere P, Driscoll J B et al. Heterogeneously integrated InP/silicon photonics: fabricating fully functional transceivers[J]. IEEE Nanotechnology Magazine, 13, 17-26(2019).

[20] Marinins A, Hänsch S, Sar H et al. Wafer-scale hybrid integration of InP DFB lasers on si photonics by flip-chip bonding with sub-300 nm alignment precision[J]. IEEE Journal of Selected Topics in Quantum Electronics, 29, 8200311(2023).

[21] Sun J L, Lin J J, Zhou M et al. High-power, electrically-driven continuous-wave 1.55-μm Si-based multi-quantum well lasers with a wide operating temperature range grown on wafer-scale InP-on-Si (100) heterogeneous substrate[J]. Light: Science & Applications, 13, 71(2024).

[22] Zhang D D, Zeng Y S, Tian Y et al. Coherent free-electron light sources[J]. Photonics Insights, 2, R07(2023).

[23] Rivera N, Wong L J, Joannopoulos J D et al. Light emission based on nanophotonic vacuum forces[J]. Nature Physics, 15, 1284-1289(2019).

[24] Dai S, Fei Z, Ma Q et al. Tunable phonon polaritons in atomically thin van der waals crystals of boron nitride[J]. Science, 343, 1125-1129(2014).

[25] Jackson J D[M]. Classical electrodynamics(1971).

[26] Landau L D, Lifshitz E M[M]. Field theory(1987).

[27] Lawson J D. Lasers and accelerators[J]. IEEE Transactions on Nuclear Science, 26, 4217-4219(1979).

[28] Woodward P M. A method of calculating the field over a plane aperture required to produce a given polar diagram[J]. Journal of the Institution of Electrical Engineers-Part IIIA: Radiolocation, 93, 1554-1558(1946).

[29] Maia M D[M]. Geometry of the fundamental interactions: on Riemann’s legacy to high energy physics and cosmology, 107-123(2011).

[30] Gan W S[M]. Gauge Invariance approach to acoustic fields(2019).

[31] Liu S G, Zhang C, Hu M et al. Coherent and tunable terahertz radiation from graphene surface plasmon polaritons excited by an electron beam[J]. Applied Physics Letters, 104, 201104(2014).

[32] Madey J M J. Stimulated emission of bremsstrahlung in a periodic magnetic field[J]. Journal of Applied Physics, 42, 1906-1913(1971).

[33] Bambini A, Renieri A, Stenholm S. Classical theory of the free-electron laser in a moving frame[J]. Physical Review A, 19, 2013-2025(1979).

[34] Gea-Banacloche J. Quantum theory of the free-electron laser: large gain, saturation, and photon statistics[J]. Physical Review A, 31, 1607-1621(1985).

[35] Akdogan N G, Polat O, Akdogan O. Magnetic field mapping simulations of sub-mm period undulators for the next generation X-ray free electron lasers[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 969, 164062(2020).

[36] Peterson B A, Oniku O D, Patterson W C et al. Technology development for short-period magnetic undulators[J]. Physics Procedia, 52, 36-45(2014).

[37] Harrison J, Joshi A, Hwang Y et al. Surface-micromachined electromagnets for 100 μm-scale undulators and focusing optics[J]. Physics Procedia, 52, 19-26(2014).

[38] Yu H K, Peng Y S, Yang Y et al. Plasmon-enhanced light-matter interactions and applications[J]. NPJ Computational Materials, 5, 45(2019).

[39] Zhang Q, Hu G W, Ma W L et al. Interface nano-optics with van der Waals polaritons[J]. Nature, 597, 187-195(2021).

[40] Lee D, So S, Hu G W et al. Hyperbolic metamaterials: fusing artificial structures to natural 2D materials[J]. eLight, 2, 1(2022).

[41] Liu F, Xiao L, Ye Y et al. Integrated Cherenkov radiation emitter eliminating the electron velocity threshold[J]. Nature Photonics, 11, 289-292(2017).

[42] Zhang X, Hu M, Zhang Z C et al. High-efficiency threshold-less Cherenkov radiation generation by a graphene hyperbolic grating in the terahertz band[J]. Carbon, 183, 225-231(2021).

[43] Adiv Y, Hu H, Tsesses S et al. Observation of 2D Cherenkov radiation[J]. Physical Review X, 13, 011002(2023).

[44] Tao J, Wu L, Zheng G X et al. Cherenkov polaritonic radiation in a natural hyperbolic material[J]. Carbon, 150, 136-141(2019).

[45] Pizzi A, Rosolen G, Wong L J et al. Graphene metamaterials for intense, tunable, and compact extreme ultraviolet and X-ray sources[J]. Advanced Science, 7, 1901609(2020).

[46] Graves W S, Brown W, Kaertner F X et al. MIT inverse Compton source concept[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 608, S103-S105(2009).

[47] Kashiwagi S, Kato R, Isoyama G et al. Development of compact coherent EUV source based on laser Compton scattering[J]. Radiation Physics and Chemistry, 78, 1112-1115(2009).

[48] Ta Phuoc K, Corde S, Thaury C et al. All-optical Compton gamma-ray source[J]. Nature Photonics, 6, 308-311(2012).

[49] Rosolen G, Wong L J, Rivera N et al. Metasurface-based multi-harmonic free-electron light source[J]. Light: Science & Applications, 7, 64(2018).

[50] Kobzev A P. The mechanism of Vavilov-Cherenkov radiation[J]. Physics of Particles and Nuclei, 41, 452-470(2010).

[51] Yang Y, Roques-Carmes C, Kooi S E et al. Photonic flatband resonances for free-electron radiation[J]. Nature, 613, 42-47(2023).

[52] Landau L D, Lifshitz E M[M]. The classical theory of fields(1971).