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Single photons are efficiently collected based on a tunable microfiber-coupled photonic crystal cavity with an embedded InAs quantum dot. 25% of total fiber collection efficiency is obtained. Tunability of the cavity and Purcell-enhanced spontaneous emission rate are also observed.
We study selective wet-etching systems for realizing self-aligned nano-emitters. Controllability of the nano-emitters' shapes, sizes and positions are the major advantages of this method. Emission of nano-emitters at telecom-wavelength is characterized from the photoluminescence measurement.
Efficient single photon collection is demonstrated based on a μ-fiber-coupled photonic crystal cavity. 249 kHz of single photons are detected, and estimated single photon count rate(overall collection efficiency) is 20 MHz(25 %).
We examined excitation of InAs/GaAs quantum dots via excited states and optical phonon-exciton interaction, employing μ-fiber coupled photonic crystal cavities of which high collection efficiencies benefited us to observe apparent emission and interactions.
An optical tapered microfiber is used to collect photoluminescence of semiconductor quantum dots in photonic crystals at cryogenic temperature (∼8K). Curved-microfiber coupled system dramatically enhances collection efficiency by several times.
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