Enhanced photon emission and absorption of single quantum dot in resonance with two modes in photonic crystal nanocavity

Ota, Yasutomo; Nomura, Masahiro; Kumagai, Naoto; Watanabe, Katsuyuki; Ishida, Satomi; Iwamoto, Satoshi; Arakawa, Yasuhiko
November 2008
Applied Physics Letters;11/3/2008, Vol. 93 Issue 18, p183114
Academic Journal
We demonstrate simultaneous enhancement of photon emission and absorption of a single InGaAs self-assembled quantum dot (QD) in resonance with two modes in a photonic crystal nanocavity. The QD, whose ground and excited states are resonant, respectively, with the first and second lowest order cavity modes, is excited by cavity resonant excitation at the wavelength of the second order cavity mode and shows 180 times greater photon emission from the ground state than a bare QD. This large enhancement is attributed to a combination of Purcell effect, efficient photon extraction, and cavity resonant absorption enhancement.


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