Simultaneous Inhibition and Redistribution of Spontaneous Light Emission in Photonic Crystals
Masayuki Fujita,
Shigeki Takahashi,
Yoshinori Tanaka,
Takashi Asano,
Susumu Noda*
Inhibiting spontaneous light emission and redistributing the
energy into useful forms are desirable objectives for advances
in various fields, including photonics, illuminations, displays,
solar cells, and even quantum-information systems. We demonstrate
both the "inhibition" and "redistribution" of spontaneous light
emission by using two-dimensional (2D) photonic crystals, in
which the refractive index is changed two-dimensionally. The
overall spontaneous emission rate is found to be reduced by
a factor of 5 as a result of the 2D photonic bandgap effect.
Simultaneously, the light energy is redistributed from the 2D
plane to the direction normal to the photonic crystal.
* To whom correspondence should be addressed. E-mail: snoda{at}kuee.kyoto-u.ac.jp
