Interferometry

Materials science

Optoelectronics

Optical modulator

Physics

3D optical data storage

Nanomaterials

Photothermal therapy

Phase modulation

Michelson interferometer

Nanotechnology

Optics

Acoustics

Optical amplifier

Intensity modulation

Modulation (music)

Optical modulation amplitude

Laser

Phase noise

Photothermal effect

Advanced Optical Materials

All‐optical modulators, where one light modulates the parameters of another light (intensity, phase, frequency, etc.) without external electronic control, have drawn extraordinary attention in all‐optical information processing. In this contribution, by taking advantage of the two‐pass structure of Michelson interferometer and the strong photothermal conversion efficiency of MXene nanomaterials, an all‐optical modulator is demonstrated with a modulation depth of &gt;27 dB, a free spectrum range of 16.8 nm and a pump‐induced phase shift slope of 0.043 π mW −1 . Moreover, the all‐optical modulator is successfully employed to switch on/off the intensity of the signal light and load information from one channel to another with comparable response time and baudrate. It is believed that the MXene‐based all‐optical modulator will open a door to practical applications of 2D materials‐based all‐optical devices in all‐optical signal processing.

MXene Ti3C2Tx: A Promising Photothermal Conversion Material and Application in All‐Optical Modulation and All‐Optical Information Loading