In situcomprehensive characterization of optoelectronic nanomaterials for device purposes

Abstract

We have combined optical fiber probe and nanoprobe techniques in a scanning electron microscope, which enables in situ optical, electrical and structural characterization of optoelectronic nanomaterials and nanodevices. The nanoprobe technique, employing sharp metal tips, is used for in situ nano-manipulation, contact and electrical measurement. The fiber probe, coupled to a spectrometer or a laser and controlled by a nano-manipulator, allows local optical detection or excitation. We show in situ assembly of a light emitter and photodetector based on individual nanostructures, demonstrating the potential application of the above technique in building prototype optoelectronic devices and selecting suitable nanostructures for device purposes. In addition, the angular resolving power of the fiber probe detection is demonstrated to be useful for studying nanoscale waveguides.

Assessment of waveguiding properties of gallium oxide nanostructures by angle resolved cathodoluminescence in a scanning electron microscope

“…CL images show a marked dependence of the contrast on the detection angle. The capability of ARCL to characterize ZnO nanoscale waveguides by spectral measurements has been previously reported [15]. Also angular resolved photoluminescence has been used to study waveguide property of ZnO nanorods [16].…”

Growth and Structure of Pure ZnO Micro/Nanocombs

“…Cathodoluminescence spectrum of an individual comb-like structure was recorded using an in situ optical-electrical measurement system based on a Keithley 4200 semiconductor characterization system and an FEI XL30-SFEG SEM equipped with 4 Kleindiek MM3A nanomanipulators, and the current intensity of electron beam was less than 1nA. More details about the in situ optical-electrical measurement system can be found in [20].…”

An Integrated Photoluminescence Sensing Platform Using a Single-Multi-Mode Fiber Coupler-Based Probe

“…Previous optical fiber PL sensing systems required two optical paths, in which one optical fiber probe was used for excitation laser delivery and the other was used for PL signal collection [11,12]. In these systems, the PL signal was collected by an additional bulk microscopic objective lens system [11].…”