Abstract:
A device for monitoring brain-object interactions in a community includes a probe module attached to each individual and including a stimulation device, a specific wavelength emitting device, an infrared (IR) receiving device and a recording memory; a central controller to regulate a connection between the probe module and at least one object to control and monitor the probe module or the object; a plurality of IR emitters to transmit a time sync signal and a command to the probe module to monitor the individual; and a plurality of specific wavelength receivers to transmit the electrical signal received by the probe module to the central controller. Accordingly, it is possible to integratedly control the connection between the probe module and the object through the central controller and prevent confusion and loss of data transmission, thereby achieving efficient monitoring of the community.
Abstract:
Provided is a Group III-V compound semiconductor device. The device includes a substrate, a compound semiconductor layer provided on the substrate; and a buffer layer interposed between the compound semiconductor layer and the substrate. The compound semiconductor layer includes a first semiconductor area having a first conductivity type and a second semiconductor area having a second conductivity type. The buffer layer includes a high electron density area. In the buffer layer, an electron density of the high electron density area is higher than an electron density outside the high electron density area.
Abstract:
An optical phase shifter according to an embodiment for achieving the object of the present disclosure includes a first semiconductor layer formed on a substrate, a second semiconductor layer having opposite polarity to the first semiconductor layer, an insulating layer formed between the first semiconductor layer and the second semiconductor layer, and including ferroelectrics, a first electrode connected to the first semiconductor layer, and a second electrode connected to the second semiconductor layer. According to an embodiment, the introduction of ferroelectric materials to a semiconductor-insulator-semiconductor (SIS) optical phase shifter brings about improvement in charge collection efficiency resulting from the negative capacitance effect, thereby achieving higher phase modulation efficiency and lower power consumption. Additionally, it is possible to realize a new structure of optical switch or modulator device through design changes of the type of ferroelectrics and the structural variables.
Abstract:
In an aspect of the present disclosure, there is disclosed a manufacture method of an antireflection coating using a self-assembly nano structure, which includes forming a first metal droplet on a substrate by means of droplet epitaxy, depositing a first non-metal on the formed first metal droplet, and forming a first nano compound crystal by means of self-assembly of the deposited first non-metal and the first metal droplet.
Abstract:
A method for optical interconnection between semiconductor chips according to an embodiment include converting an electrical signal to an optical signal, transmitting the optical signal to a second substrate disposed above or below a first substrate using an optical transmitter provided on the first substrate, receiving the optical signal using an optical detector provided on the second substrate, and converting the received optical signal to an electrical signal. Accordingly, using a mid-infrared wavelength range of light that is transparent to semiconductor materials such as silicon and next-generation high-mobility materials, it is possible to enable interconnection between stacked semiconductor chips without using metal wiring. Using optical interconnection, it is possible to significantly reduce the bandwidth and power consumption, and overcome the limitations of TSV technology, and it is possible to extend the photonics technology and platform established in the existing Si Photonics, thereby reducing the cost required for design.
Abstract:
An underwater communication apparatus for performing an optical communication with an external device under water includes: a current control unit that modulates first data to be transmitted to the external device into a first current; and a light transmitting unit that transmits light with a wavelength of 450 to 500 nm corresponding to the first current to the external device.