On-chip photon-pair generation in a silica microtoroidal cavity

Abstract

Microcavities with high Q factor and small mode volume have the potential to be efficient and compact sources of photon pairs. Here, we demonstrate on-chip photon-pair generation by spontaneous four-wave mixing in a silica microtoroidal cavity and obtain a coincidence-to-accidental ratio of 7.4 ± 0.1 with a pump power of 46 µW. The heralded photons also exhibit antibunching characterized by autocorrelation function values of g c ( 2 ) ( 0 ) = 0.57 ± 0.03 < 1 . Comparing with a scaling model, the main noise source is found to be spontaneous Raman scattering in the cavity. This work opens a new possible means for realizing integrated nonclassical photon sources based on silica photonic circuits toward scalable quantum technologies.

Estimation of the dynamic range of the angular velocity sensor based on a fiber-optic resonator

“…Такие резонаторы находят применение в самых различных областях науки и техники: в лазерной технике для стабилизации частоты излучения [1], в метрологии для сверхточного измерения перемещений [2], в спектроскопии для измерения концентрации различных веществ [3], в биофизике для определения наличия патогенов [4], в качестве неклассических источников фотонов [5], датчиков температуры [6], оптоэлектронных генераторов [7] и т.д.…”

Optical manipulation and conversion in whispering gallery mode resonators with pump depletion

“…Unlike other types of optical cavities, monolithic WGMRs can be integrated on a chip and multiplexed, which makes them indispensable in the creation of chip-scale nonlinear optical devices [4]. Recently, considerable efforts have been made in the investigation of nonlinear optical processes in WGMRs because of their important applications in frequency conversion [5][6][7][8][9][10], new wavelength generation [11][12][13][14][15][16][17][18][19][20][21][22], Kerr comb generation [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40], and correlated photon pair generation [41,42].…”

Spectrally pure photon pair generation in asymmetric heterogeneously coupled waveguides

“…Moreover, such quantum emitters often do not afford room-temperature operation [5] and require expensive cryogenic cooling. A more readily available approach that has been widely used in various quantum optical experiments [6] is to use heralded single-photon sources to generate photon pairs via nonlinear optical processes including spontaneous parametric down-conversion (SPDC) in χ (2) and spontaneous four-wave mixing (SFWM) in χ (3) nonlinear media [7][8][9]. In such a case, the detection of one photon indicates the existence of its twin [10].…”