The exploration of new materials, novel quantum phases, and devices requires ways to prepare cleaner samples with smaller feature sizes. Initially, this meant the use of a cleanroom that limits the amount and size of dust particles. However, many materials are highly sensitive to oxygen and water in the air. Furthermore, the ever-increasing demand for a quantum workforce, trained and able to use the equipment for creating and characterizing materials, calls for a dramatic reduction in the cost to create and operate such facilities. To this end, we present our cleanroom-in-a-glovebox, a system that allows for the fabrication and characterization of devices in an inert argon atmosphere. We demonstrate the ability to perform a wide range of characterization as well as fabrication steps, without the need for a dedicated room, all in an argon environment. Finally, we discuss the custom-built antechamber attached to the back of the glovebox. This antechamber allows the glovebox to interface with ultra-high vacuum equipment such as molecular-beam epitaxy and scanning tunneling microscopy.

Pristine, undoped graphene has a constant absorption of 2.3 % across the visible to near-infrared (VIS-NIR) region of the electromagnetic spectrum. Under certain conditions, such as nanostructuring and intense gating, graphene can interact more robustly with VIS-NIR light and exhibit a large nonlinear optical response. Here, we explore the optical properties of graphene/LaAlO3/SrTiO3 nanostructures, where nanojunctions formed at the LaAlO3/SrTiO3 interface enable large (~10 8 V/m) electric fields to be applied to graphene over a scale of ~10 nm. Upon illumination with ultrafast VIS-NIR light, graphene/LaAlO3/SrTiO3 nanostructures produce broadband THz emission as well as a sum-frequency generated (SFG) response. Strong spectrally sharp, gate-tunable extinction features (>99.99%) are observed in both the VIS-NIR and SFG regions alongside significant intensification of the nonlinear response. The observed gate-tunable strong graphene-light interaction and nonlinear optical response are of fundamental interest and open the way for future exploitation in graphene-based optical devices.Because graphene typically lacks a plasmonic response in the VIS-NIR regime, such behavior is difficult to achieve at higher frequencies 13 . However, the interaction between graphene and VIS-NIR light can be enhanced by creating graphene-based metamaterials or surfaces in which the CNP is modulated at the nanoscale, for example, using AFM 14 or STM 15 , by creating arrays of graphene nanodisks or nanoribbons [10][11][12]16 , or by placing graphene near plasmonic metasurfaces or nanoscale metal gratings [17][18][19][20] .Recently, a technique to control the CNP of graphene-both reversibly and locally-has been developed using graphene integrated with LaAlO3/SrTiO3 (LAO/STO) heterostructures 21,22 . LAO/STO has a tunable conductive interface 23 with a variety of interesting physical properties 24 . When the LAO thickness is close to the critical thickness for a metal-insulator transition, ∼3-4 unit cells 25 , the conductivity of the LAO/STO interface can be controlled using conductive atomic force microscope (c-AFM) lithography 14,26 .A wide range of optoelectronic devices can be fabricated at the LAO/STO interface in this fashion, such as a 10 nm-scale photodetector 27 and nanoscale, terahertz (THz) sources and detectors 28,29 with a bandwidth of more than 100 THz. LAO/STO nanostructures can be placed within two nanometers of an active graphene device and used, for example, to create reconfigurable edge channels in graphene 22 . EXPERIMENTAL SETUPThe nonlinear optical properties of graphene/LAO/STO (G/LAO/STO) nanojunctions (illustrated in Figure 1(b)) are measured through a broadband THz spectroscopy technique (Figure 2) that takes advantage of strong optical nonlinearities in STO 28,29,30 . The G/LAO/STO nanojunctions are created using c-AFM lithography, described in detail elsewhere 14 and summarized in the Materials and Methods section. A nanojunction (Figure 1(b)) consists of a conducting LAO/STO nanowire with a nanoscale (~10 nm) i...

Over the past decade, augmented reality (AR) has emerged into the mainstream with numerous studies conducted on its effectiveness in both military and public learning environments. Compatible with constructivist learning theory, AR scenarios help instructors grab and maintain learner attention, close the realism gap between learning and job environments, enhance practice and rehearsal opportunities, and support transfer of learning. AR integration into the U.S. Coast Guard training system can enhance learning while managing the ever‐rising challenges of limited time and resources.

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