Efficient single-photon sources based on low-density quantum dots in photonic-crystal nanocavities.
An efficient single-photon source based on low-density InGaAs quantum dots in a photonic-crystal nanocavity is demonstrated. The single-photon source features the effects of a photonic band gap, yielding a single-mode spontaneous emission coupling efficiency as high as beta = 92% and a linear polarization degree up to p = 95%. This appealing performance makes it well suited for practical implementation of polarization-encoded schemes in quantum cryptography.
Chang
Wen-Hao
WH
Department of Physics, National Central University, Chung-li, 32054 Taiwan, Republic of China.
Chen
Wen-Yen
WY
Chang
Hsiang-Szu
HS
Hsieh
Tung-Po
TP
Chyi
Jen-Inn
JI
Hsu
Tzu-Min
TM