摘要:
A wavelength tunable VCSEL is provided. The wavelength tunable VCSEL includes a current constricting layer which is formed on a lower distributed Bragg reflector, upper and lower electrodes for laser oscillation, and additional electrodes which are formed on a predetermined region of an upper distributed Bragg reflector from which light is emitted so as to vary a width of an effective resonance region. Compared to an existing VCSEL, the wavelength tunable VCSEL can rapidly change a wavelength of emitted light and prevent the deterioration of gain characteristics of laser oscillation due to variations in the width of the effective resonance region according to variations in a temperature. As a result, a wavelength tunable region of emitted laser can be increased.
摘要:
A long wavelength vertical cavity surface emitting laser (VCSEL) with a monolithically-grown photodetector is provided. The photodetector is installed in a middle portion of or on a bottom surface of a lower distributed Bragg reflector of the long wavelength VCSEL. The photodetector is integrated with the long wavelength VCSEL. A substrate on which the long wavelength VCSEL and the photodetector are crystal-grown does not absorb a laser beam emitted from the long wavelength VCSEL. Thus, the laser beam heading toward the substrate is accurately detected, and the gain of the laser beam is effectively controlled.
摘要:
Light-emitting devices (LED) and methods of manufacturing the same. A LED includes a first type semiconductor layer, a nano array layer that includes a plurality of nano structures each including a first type semiconductor nano core selectively grown from the first type semiconductor layer, and an active layer and a second type semiconductor layer sequentially grown from a side surface of the first type semiconductor nano core, and that is formed in a selective growth region formed in a surface of the first type semiconductor layer, a first electrode layer that is formed to be used when a voltage is applied to the first type semiconductor layer and formed in a predetermined pattern connecting regions that do not correspond to the selective growth region in the first type semiconductor layer, a second electrode layer formed to be used when a voltage is applied to the second type semiconductor layer on the plurality of nano structures, and an insulating layer formed between the first electrode layer and the second electrode layer so that the first electrode layer is insulated from the second electrode layer.
摘要:
A light-emitting diode and a method of manufacturing the light-emitting diode are provide, the light-emitting diode including a lower electrode on a substrate, a template layer on the lower electrode. The template layer may have a plurality of open regions. A plurality of nano-dashes may be formed in the plurality of open regions of the template layer. A transparent insulating layer may be formed between the nano-dashes. A transparent upper electrode may be formed on the nano-dashes and the transparent insulating layer.
摘要:
A multi-port light source of a photonic integrated circuit (PIC) may include a light emission portion for generating light; and a plurality of waveguides on opposite sides of the light emission portion to guide the light. A multi-port light source of a photonic integrated circuit (PIC) may include a first layer including a first pattern and a second pattern that are different from each other; an insulating layer on at least a region of the first layer; an active layer on at least a region of the insulating layer; and a reflective layer on the active layer.
摘要:
A semiconductor die includes at least one first region and at least one second region. The at least one first region is configured to emit light having at least a first wavelength. The at least one second region is configured to emit light having at least a second wavelength, which is different from the first wavelength.
摘要:
A semiconductor die includes at least one first region and at least one second region. The at least one first region is configured to emit light having at least a first wavelength. The at least one second region is configured to emit light having at least a second wavelength, which is different from the first wavelength.
摘要:
A light emitting device (LED) may include a first semiconductor layer; an active layer formed on the first semiconductor layer and configured to generate first light having a first wavelength; a second semiconductor layer, formed on the active layer; and a plurality of semiconductor nano-structures arranged apart from each other and formed on the second semiconductor layer. The nano-structures may be configured to at least partially absorb the first light and emit second light having a second wavelength different from the first wavelength.
摘要:
Provided are a laser module allowing direct light modulation and a laser display employing the laser module. The laser module may include a semiconductor chip, a Volume Bragg Grating (VBG), a pump laser and a non-linear optical element. The semiconductor chip includes an active layer generating light of primary wavelength and a reflective layer providing the generated light to a cavity and reflecting the light within the cavity. The VBG may output light repeatedly reflected between the reflective layer and the VBG. The non-linear optical element disposed outside a cavity between the semiconductor chip and the VBG may convert the light of a first wavelength emitted from the active layer into light of a second wavelength different from the first wavelength. The laser module having the above-mentioned construction uses an external cavity laser and a non-linear optical element to achieve direct light modulation.