Nonlinear Optical Features of Zeolitic Imidazolate Framework-67 Nanocrystals for Mid-Infrared Pulse Generation

Abstract

Through a liquid-phase synthesis route, zeolitic imidazolate framework-67 (ZIF-67) nanomaterials are prepared and deposited onto a quartz glass to form a new type of saturable absorber (SA), of which nonlinear optical (NLO) properties are measured at a wavelength of 2 μm with a homemade nanosecond pulsed laser. The result shows that the ZIF-67 sample exhibits an excellent NLO response. As an application, a stable passively Qswitched (PQS) 2 μm solid-state laser with ZIF-67 as a SA was demonstrated. The pulsed laser with a minimum pulse width of 278 ns at a repetition frequency of 131 kHz was generated via an output coupler (OC) of 5% transmittance, corresponding to a maximum single-pulse energy of 1.5 μJ. It is the first presentation of a 2 μm solid-state PQS laser with ZIF-67 utilized as a modulator, to the best of our knowledge. Taking into account the laser performance in experiments, ZIF-67 is shown to be a novel nanomaterial for the application of a modulator for mid-infrared (MIR) pulse generation.

Enhanced broadband nonlinear optical response of TiO2/CuO nanosheets via oxygen vacancy engineering

“…Notably, under the same experimental conditions, the empty substrates did not show any nonlinear response. For a two-level energy system, the experimental data can be theoretically fitted with the following equation [45]:…”

“…It intuitively presented that the transmittance increased as the incident laser intensity increased until saturation, which was examined a typical feature of saturable absorbers. During the fitting, we assumed that the nanomaterials possessed instantaneous response with the following relationship [45]:…”

Polyhedron ZIF-67 nanoparticles deposited on a D-shape fibre for stable soliton operation in an ultrashort fibre laser

“…32 The prepared ZIF-67 possesses a high specific surface area with good physical features. [33][34][35][36] To date, ZIF-67 has shown good nonlinear absorption performance in the 1, 1.3, and 2 mm regions. [33][34][35] The potential application of ZIF-67 in ultrafast photonics attracts our great interest.…”

“…33–36 To date, ZIF-67 has shown good nonlinear absorption performance in the 1, 1.3, and 2 μm regions. 33–35 The potential application of ZIF-67 in ultrafast photonics attracts our great interest.…”

Layered Metallic Vanadium Disulfide for Doubly Q-Switched Tm:YAP Laser with EOM: Experimental and Theoretical Investigations

“…As a saturable absorber (SA), many emerging graphene-like two-dimensional (2D) nanomaterials have been investigated in the 2 µm wavelength region [13,14], such as transition-metal dichalcogenides (TMDs) [15], g-C 3 N 4 [16], MXenes [17], layered double hydroxide [18], and metal/covalent organic frameworks [19,20]. Among the TMDs, layered vanadium disulfide (VS 2 ) exhibits outstanding synthetic properties [21,22].…”