High-resolution fluorescence microscopy based on a cyclic sequential multiphoton process.
We demonstrate high-resolution fluorescence microscopy based on a cyclic sequential multiphoton (CSM) process, which gives rise to fluorescence emission following a sequence of cyclic transitions between the bright and dark states of a fluorophore induced by pump and reverse light. By temporally modulating the reverse intensity, we can extract the fluorescence signal generated through the CSM process. We show that the demodulated fluorescence signal is nonlinearly proportional to the excitation intensities and it gives a higher spatial resolution than that of a confocal microscope.
Keisuke
K
Isobe
Akira
A
Suda
Hiroshi
H
Hashimoto
Fumihiko
F
Kannari
Hiroyuki
H
Kawano
Hideaki
H
Mizuno
Atsushi
A
Miyawaki
Katsumi
K
Midorikawa
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