All-optical Ti 3 C 2 T x modulator based on a sandwich structure.

Authors :: Li E
Jiang M
Li D
Wang R
Kang X
Wang T
Yan X
Liu B
Ren Z
Source :: Applied optics [Appl Opt] 2022 Feb 01; Vol. 61 (4), pp. 925-930.
Publication Year :: 2022
Abstract: All-optical modulators based on a M X e n e - T i <subscript>3</subscript> C <subscript>2</subscript> T <subscript> x </subscript> have recently garnered much attention due to their broadband light-matter interactions and ultrafast carrier dynamics. To investigate the modulation characteristics of pump intensity and pump light modulation frequency, we establish an all-optical modulator with a sandwich structure based on M X e n e - T i <subscript>3</subscript> C <subscript>2</subscript> T <subscript> x </subscript> / P V A (polyvinyl alcohol) film. The result shows that this modulator can achieve a high modulation depth of 12.55 dB and a modulation frequency of 50 kHz corresponding to a response time at the microsecond scale. The successful preparation of the modulator is attributed to the saturable absorption characteristics of the M X e n e - T i <subscript>3</subscript> C <subscript>2</subscript> T <subscript> x </subscript> . This modulator has great potential in all-optical communications and ultrafast optical signal processing.